Method and apparatus for treating gasoline vehicle particulate filter catalyst

Abstract

The application discloses a treatment method of a gasoline vehicle particle trap catalyst, and comprises the following steps: jet atomizing a mixed dispersion liquid to obtain atomized gas of the mixed dispersion liquid; heating the atomized gas to obtain heated atomized gas; drying and cooling the gasoline vehicle particle trap catalyst flowing into the heated atomized gas, weighing the gasoline vehicle particle trap catalyst after drying and cooling to obtain an original weight, drying and cooling the gasoline vehicle particle trap catalyst flowing into the heated atomized gas, and weighing the gasoline vehicle particle trap catalyst after drying and cooling to obtain a mixed weight; determining an increased weight of the mixed weight relative to the original weight in a unit volume; and in response to the increased weight in the unit volume being in a weight threshold interval, determining that sol micro-particles are attached to an inner pore wall of the gasoline vehicle particle trap catalyst. The application solves the problem that the PN capture rate of the gasoline vehicle particle trap catalyst needs to be improved.

Description

Technical Field

[0001] This invention relates to the field of exhaust aftertreatment technology, and more specifically, to a method and apparatus for treating the catalyst of a gasoline vehicle particulate filter. Background Technology

[0002] Compared to the current China VI(a) regulations, China VI(b) adds Real Drive Emission (RDE) testing and certification, and imposes strict limits on particulate number (PN) and NOx emissions in the RDE test. Unlike the conventional vehicle wheel test, the RDE test is conducted on actual roads, and the test conditions are uncertain, making pollutant emissions more difficult to control than in fixed-condition tests. Due to the increased control requirements for PN emissions in the China VI stage for gasoline vehicles, most OEMs have installed gasoline particulate filter catalysts (cGPF) in their vehicle exhaust aftertreatment systems to capture PN in the exhaust gases. In the China VI Type I test, the application of cGPF can control PN emissions to within 6E+11# / km. Based on margin and emission deviation considerations, the general engineering target for PN emissions is 2~4E+11# / km. However, RDE testing may result in the aforementioned margin and deviation being insufficient to cover the uncertainties of the operating conditions, thus leading to the technical problem that the PN capture rate of the particulate filter catalyst in gasoline vehicles needs to be improved.

[0003] There is currently no effective solution to the technical problem of improving the PN capture rate of the catalyst in the gasoline vehicle particulate filter. Summary of the Invention

[0004] This invention provides a method and apparatus for processing catalysts in gasoline vehicle particulate filters, thereby addressing at least the technical problem of the need to improve the PN capture rate of catalysts in gasoline vehicle particulate filters.

[0005] According to one aspect of the present invention, a method for processing a gasoline vehicle particulate filter catalyst is provided. The method may include: jet atomizing a mixed dispersion to obtain an atomized gas of the mixed dispersion; heating the atomized gas to obtain a heated atomized gas; drying and cooling the gasoline vehicle particulate filter catalyst to which the heated atomized gas is to be flowed, and weighing the dried and cooled gasoline vehicle particulate filter catalyst to obtain its original weight; flowing the heated atomized gas into the interior of the gasoline vehicle particulate filter catalyst fixed at the outlet of a conveying pipe; drying and cooling the gasoline vehicle particulate filter catalyst that has already flowed into the heated atomized gas, and weighing the dried and cooled gasoline vehicle particulate filter catalyst to obtain a mixed weight; determining the increase in mixed weight relative to the original weight per unit volume; and determining that, in response to the increase in weight per unit volume being within a weight threshold range, that sol particles are attached to the internal pore walls of the gasoline vehicle particulate filter catalyst.

[0006] Optionally, before jet atomizing the mixed dispersion to obtain the atomized gas of the mixed dispersion, the treatment method further includes: adding a regulator to the dispersion and uniformly stirring the dispersion to obtain the mixed dispersion, wherein the regulator includes at least one of ammonium oleate, ammonium acetate and ammonium aminosulfonate.

[0007] Optionally, before adding the regulator to the dispersion and stirring the dispersion uniformly to obtain a mixed dispersion, the treatment method further includes: dispersing the sol compound in deionized water to obtain a dispersion, wherein the sol compound includes at least one of aluminum sol, titanium sol, and zirconium sol.

[0008] Optionally, determining the increase in weight per unit volume of the mixed weight relative to the original weight includes: obtaining the difference between the mixed weight and the original weight; and determining the quotient between the difference and the volume of the gasoline vehicle particulate filter catalyst as the increase in weight per unit volume of the gasoline vehicle particulate filter catalyst.

[0009] Optionally, the processing method further includes: the average median diameter of the atomized particles of the atomized gas is within the threshold range of the average median diameter of the atomized particles.

[0010] According to one aspect of the present invention, a processing apparatus for a gasoline vehicle particulate filter catalyst is provided. The apparatus may include: an atomization unit for jet atomizing a mixed dispersion to obtain an atomized gas of the mixed dispersion; a heating unit for heating the atomized gas to obtain heated atomized gas; a weighing unit for drying and cooling the gasoline vehicle particulate filter catalyst to be fed into the heated atomized gas, and weighing the dried and cooled gasoline vehicle particulate filter catalyst to obtain an initial weight, and drying and cooling the gasoline vehicle particulate filter catalyst already fed into the heated atomized gas, and weighing the dried and cooled gasoline vehicle particulate filter catalyst to obtain a mixed weight; a determining unit for determining the increase in mixed weight relative to the initial weight per unit volume; and a response unit for determining that sol particles are attached to the internal pore walls of the gasoline vehicle particulate filter catalyst in response to the increase in weight per unit volume being within a weight threshold range.

[0011] In this embodiment of the invention, the mixed dispersion is atomized by an atomizer to obtain atomized gas of the mixed dispersion. The atomized gas is heated to obtain heated atomized gas. The gasoline particulate filter catalyst to be fed into the heated atomized gas is dried and cooled, and the dried and cooled gasoline particulate filter catalyst is weighed to obtain its original weight. The heated atomized gas is then fed into the gasoline particulate filter catalyst fixed at the outlet of the conveying pipe. The gasoline particulate filter catalyst that has been fed into the heated atomized gas is dried and cooled, and the dried and cooled gasoline particulate filter catalyst is weighed to obtain the mixed weight. The mass per unit volume of the gasoline particulate filter catalyst is determined based on the mixed weight and the original weight. By increasing the weight, the relationship between the increased weight per unit volume and the weight threshold range is judged. If the increased weight is not within the weight threshold range, heated atomized gas continues to flow into the gasoline vehicle particulate filter catalyst until the increased weight is within the weight threshold range. If the increased weight is within the weight threshold range, it is determined that sol particles are attached to the internal pore walls of the gasoline vehicle particulate filter catalyst. Thus, a gasoline vehicle particulate filter catalyst with sol particles attached to its pore walls can be obtained, thereby achieving a similar purpose to ash accumulation. This solves the technical problem of improving the PN capture rate of gasoline vehicle particulate filter catalysts and realizes the technical effect of improving the PN capture rate of gasoline vehicle particulate filter catalysts. Attached Figure Description

[0012] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0013] Figure 1This is a flowchart of a method for treating a catalyst in a gasoline vehicle particulate filter according to an embodiment of the present invention;

[0014] Figure 2 This is a flowchart of a treatment method for improving the PN capture performance of a catalyst in an existing gasoline vehicle particulate filter according to an embodiment of the present invention;

[0015] Figure 3 This is a schematic diagram of a catalyst treatment device for a gasoline vehicle particulate filter according to an embodiment of the present invention. Detailed Implementation

[0016] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0017] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0018] Example 1

[0019] According to an embodiment of the present invention, a method for processing a catalyst in a gasoline vehicle particulate filter is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0020] Figure 1 This is a flowchart of a method for treating a catalyst in a gasoline vehicle particulate filter according to an embodiment of the present invention. The method may include the following steps:

[0021] Step S101: The mixed dispersion is atomized by jet spraying to obtain the atomized gas of the mixed dispersion.

[0022] In the technical solution provided by step S101 of the present invention, the mixed dispersion can be placed in an atomizer, thereby performing jet atomization of the mixed dispersion through the atomizer to obtain atomized gas of the mixed dispersion, and the atomized gas of the mixed dispersion flows into a conveying pipe. The mixed dispersion can be obtained by adding a regulator to the dispersion. The forward speed of the atomized gas in the conveying pipe can be controlled between 1 m / s and 2 m / s. For example, the forward speed of the atomized gas in the conveying pipe can be 1.2 m / s, 1.3 m / s, 1.4 m / s and 1.5 m / s, etc. This is only an example and is not specifically limited.

[0023] Optionally, the atomized gas of the mixed dispersion is fed into the conveying pipe, and the forward speed of the atomized gas in the conveying pipe is controlled at 1 m / s to 2 m / s, which can ensure the technical effect of heating the atomized gas of the mixed dispersion.

[0024] Step S102: Heat the atomized gas to obtain heated atomized gas.

[0025] In the technical solution provided by step S102 of the present invention, after the mixed dispersion is jet-atomized to obtain the atomized gas of the mixed dispersion, the atomized gas of the mixed dispersion flowing into the conveying pipe is heated by electric heating. The heating temperature of the atomized gas of the mixed dispersion flowing into the conveying pipe can be controlled between 100°C and 150°C, and the residence time of the atomized gas of the mixed dispersion in the heating area can be controlled between 1s and 5s.

[0026] Optionally, the heating temperature for heating the atomized gas of the mixed dispersion flowing into the conveying pipe can be 110℃, 120℃, 130℃ and 140℃, etc., and the residence time of the atomized gas of the mixed dispersion in the heating zone can be 2s, 3s, 3.1s and 3.5s, etc., which are only examples and are not specifically limited.

[0027] Step S103: The gasoline particulate filter catalyst to be fed into the heated atomized gas is dried and cooled, and the dried and cooled gasoline particulate filter catalyst is weighed to obtain the original weight. The heated atomized gas is then fed into the gasoline particulate filter catalyst fixed at the outlet of the conveying pipe. The gasoline particulate filter catalyst that has been fed into the heated atomized gas is dried and cooled, and the dried and cooled gasoline particulate filter catalyst is weighed to obtain the mixed weight.

[0028] In the technical solution provided by step S103 of the present invention, after heating the atomizing gas to obtain heated atomizing gas, the gasoline vehicle particulate filter catalyst to be fed into the heated atomizing gas is dried at a high temperature for a certain period of time. Then, the dried gasoline vehicle particulate filter catalyst is placed in a desiccator and cooled to room temperature. The gasoline vehicle particulate filter catalyst cooled to room temperature is then weighed to obtain the original weight. The temperature during drying of the gasoline vehicle particulate filter catalyst to be fed into the heated atomizing gas can be controlled between 100°C and 120°C, and the drying time can be controlled between 1 minute and 1 second. From 1 to 2 hours, heated atomized gas is flowed into the gasoline vehicle particulate filter catalyst fixed at the outlet of the conveying pipe. The gasoline vehicle particulate filter catalyst that has been fed with heated atomized gas is dried at high temperature for a certain period of time. Then, the dried gasoline vehicle particulate filter catalyst is placed in a desiccant and cooled to room temperature. The gasoline vehicle particulate filter catalyst that has been cooled to room temperature is then weighed to obtain the mixed weight. The temperature during the drying of the gasoline vehicle particulate filter catalyst that has been fed with heated atomized gas can be controlled between 100°C and 120°C, and the drying time can be controlled between 1 hour and 2 hours.

[0029] Optionally, when the temperature for drying the gasoline vehicle particulate filter catalyst to be fed into the heated atomized gas is 110°C and the drying time is 1 hour, the gasoline vehicle particulate filter catalyst to be fed into the heated atomized gas is dried at 110°C for 1 hour. Then, the dried gasoline vehicle particulate filter catalyst is placed in a desiccator and cooled to room temperature. The gasoline vehicle particulate filter catalyst cooled to room temperature is then weighed to obtain the original weight. The original weight can be represented by m1. This is only an example and is not specifically limited.

[0030] Optionally, when the temperature for drying the gasoline vehicle particulate filter catalyst to be fed into the heated atomized gas is 120°C and the drying time is 1 hour, the gasoline vehicle particulate filter catalyst to be fed into the heated atomized gas is dried at 120°C for 1 hour. Then, the dried gasoline vehicle particulate filter catalyst is placed in a desiccator and cooled to room temperature. The gasoline vehicle particulate filter catalyst cooled to room temperature is then weighed to obtain the original weight. The original weight can be represented by m1. This is only an example and is not specifically limited.

[0031] Optionally, when the temperature for drying the gasoline vehicle particulate filter catalyst that has flowed into the heated atomized gas is 110°C and the drying time for the gasoline vehicle particulate filter catalyst that has flowed into the heated atomized gas is 1 hour, the gasoline vehicle particulate filter catalyst that has flowed into the heated atomized gas is dried at 110°C for 1 hour. Then, the dried gasoline vehicle particulate filter catalyst is placed in a desiccator and cooled to room temperature. The gasoline vehicle particulate filter catalyst that has cooled to room temperature is then weighed to obtain the mixed weight. The mixed weight can be expressed as m2. This is only an example and is not specifically limited.

[0032] Optionally, when the temperature for drying the gasoline vehicle particulate filter catalyst that has flowed into the heated atomized gas is 100°C and the drying time for the gasoline vehicle particulate filter catalyst that has flowed into the heated atomized gas is 2 hours, the gasoline vehicle particulate filter catalyst that has flowed into the heated atomized gas is dried at 100°C for 2 hours. Then, the dried gasoline vehicle particulate filter catalyst is placed in a desiccator and cooled to room temperature. The gasoline vehicle particulate filter catalyst that has cooled to room temperature is then weighed to obtain the mixed weight. The mixed weight can be expressed as m2. This is only an example and is not specifically limited.

[0033] Step S104: Determine the increase in weight per unit volume of the mixed weight relative to the original weight.

[0034] In the technical solution provided by step S104 of the present invention, after drying and cooling the gasoline vehicle particulate filter catalyst that has flowed into the heated atomizing gas, and weighing the dried and cooled gasoline vehicle particulate filter catalyst to obtain the mixed weight, the increase in weight per unit volume of the mixed weight relative to the original weight of the gasoline vehicle particulate filter catalyst can be determined based on the mixed weight of the gasoline vehicle particulate filter catalyst and the original weight of the gasoline vehicle particulate filter catalyst.

[0035] Alternatively, the increase in weight per unit volume of the mixed weight relative to the original weight can be determined by the following formula:

[0036] M = (m2 - m1) / V;

[0037] Where m1 can be used to represent the original weight of the catalyst in the gasoline vehicle particulate filter, m2 can be used to represent the mixed weight of the catalyst in the gasoline vehicle particulate filter, and V can be used to represent the volume of the catalyst in the gasoline vehicle particulate filter.

[0038] Step S105, in response to the increase in weight per unit volume being within the weight threshold range, it is determined that sol particles are attached to the internal pore walls of the gasoline vehicle particulate filter catalyst.

[0039] In the technical solution provided by step S105 of the present invention, after determining the increase in weight of the mixture relative to the original weight per unit volume, the relationship between the increase in weight per unit volume and the weight threshold range is judged. If the increase in weight per unit volume is not within the weight threshold range, the heated atomized gas continues to flow into the gasoline vehicle particulate filter catalyst until the increase in weight per unit volume is within the weight threshold range. If the increase in weight per unit volume is within the weight threshold range, it is determined that sol particles are attached to the internal pore walls of the gasoline vehicle particulate filter catalyst. Thus, a gasoline vehicle particulate filter catalyst with sol particles attached to its pore walls can be obtained. The weight threshold range can be 3 g / L to 5 g / L.

[0040] Optionally, when the weight increase is 3.3 g / L, the relationship between the weight increase per unit volume and the weight threshold range is determined. In response to the weight increase of 3.3 g / L being within the weight threshold range, it is determined that the internal pore walls of the gasoline vehicle particulate filter catalyst are coated with sol particles. Thus, a gasoline vehicle particulate filter catalyst with sol particles coated on its pore walls can be obtained. This is only an example and is not specifically limited.

[0041] Optionally, when the weight increase is 4.3 g / L, the relationship between the weight increase per unit volume and the weight threshold range is determined. In response to the weight increase of 4.3 g / L being within the weight threshold range, it is determined that the internal pore walls of the gasoline vehicle particulate filter catalyst are coated with sol particles. Thus, a gasoline vehicle particulate filter catalyst with sol particles coated on its pore walls can be obtained. This is only an example and is not specifically limited.

[0042] In steps S101 to S105 of this application, the mixed dispersion is atomized by an atomizer to obtain atomized gas of the mixed dispersion. The atomized gas is heated to obtain heated atomized gas. The gasoline vehicle particulate filter catalyst to which the heated atomized gas is to be flowed is dried and cooled, and the gasoline vehicle particulate filter catalyst after drying and cooling is weighed to obtain the original weight. The heated atomized gas is then flowed into the gasoline vehicle particulate filter catalyst fixed at the outlet of the conveying pipe, and the gasoline vehicle particulate filter catalyst that has flowed into the heated atomized gas is dried and cooled. The gasoline vehicle particulate filter catalyst after drying and cooling is weighed to obtain the mixed weight. Based on the mixed weight and the original weight, the mixed weight relative to the original weight is determined in terms of single... The increase in weight per unit volume is compared with the weight threshold range. If the increase in weight is not within the weight threshold range, heated atomized gas continues to flow into the gasoline vehicle particulate filter catalyst until the increase in weight is within the weight threshold range. If the increase in weight is within the weight threshold range, it is determined that sol particles are attached to the internal pore walls of the gasoline vehicle particulate filter catalyst. This results in a gasoline vehicle particulate filter catalyst with sol particles attached to its pore walls, achieving a similar purpose to ash accumulation. This solves the technical problem of improving the PN capture rate of gasoline vehicle particulate filter catalysts and achieves the technical effect of improving the PN capture rate of gasoline vehicle particulate filter catalysts.

[0043] The method described in this embodiment will be further described below.

[0044] As an optional embodiment, before jet atomization of the mixed dispersion in step S101 to obtain the atomized gas of the mixed dispersion, the processing method further includes: adding a regulator to the dispersion and uniformly stirring the dispersion to obtain the mixed dispersion.

[0045] In this embodiment, before jet atomization of the mixed dispersion to obtain the atomized gas of the mixed dispersion, a regulator of 1% to 5% relative to the mass of the sol compound is added to the dispersion, and the dispersion with added regulator is stirred uniformly to obtain the mixed dispersion. The dispersion can be formed by dispersing the sol compound in deionized water. The regulator can include at least one of ammonium oleate, ammonium acetate, and ammonium aminosulfonate. This is only an example and is not specifically limited.

[0046] Optionally, when the regulator is ammonium oleate, 5% of the mass of the sol compound is added to the dispersion, and the dispersion with added ammonium oleate is stirred evenly to obtain a mixed dispersion. This is only an example and is not specifically limited.

[0047] Optionally, when the regulator is ammonium acetate, 1% of the mass of the sol compound is added to the dispersion, and the dispersion with added ammonium acetate is stirred evenly to obtain a mixed dispersion. This is only an example and is not specifically limited.

[0048] Optionally, when the regulator is ammonium aminosulfonate, 3% of the mass of the sol compound is added to the dispersion, and the dispersion with added ammonium aminosulfonate is stirred evenly to obtain a mixed dispersion. This is only an example and is not specifically limited.

[0049] As an optional embodiment, before adding the regulator to the dispersion and uniformly stirring the dispersion to obtain a mixed dispersion, the treatment method further includes: dispersing the sol compound in deionized water to obtain a dispersion.

[0050] In this embodiment, before adding the regulator to the dispersion and stirring the dispersion uniformly to obtain a mixed dispersion, the dispersion can be formed by dispersing the sol compound in deionized water. The sol compound may include at least one of aluminum sol, titanium sol, and zirconium sol, and the mass fraction of the sol compound in the dispersion can be controlled between 20% and 30%.

[0051] Optionally, when the sol compound is aluminum sol, 30% by mass of aluminum sol is dispersed in deionized water to form a dispersion. This is only an example and is not a specific limitation.

[0052] Optionally, when the sol compound is titanium sol, a titanium sol with a mass fraction of 40% is dispersed in deionized water to form a dispersion. This is only an example and is not specifically limited.

[0053] Optionally, when the sol compound is zirconium sol, a zirconium sol with a mass fraction of 35% is dispersed in deionized water to form a dispersion. This is only an example and is not a specific limitation.

[0054] As an optional embodiment, step S104, determining the increase in weight per unit volume of the mixed weight relative to the original weight, includes: obtaining the difference between the mixed weight and the original weight; and determining the quotient between the difference and the volume of the gasoline vehicle particulate filter catalyst as the increase in weight per unit volume of the gasoline vehicle particulate filter catalyst.

[0055] In this embodiment, after obtaining the original weight and the mixed weight, a first calculation result can be obtained by calculating the difference between the mixed weight and the original weight. By calculating the quotient between the first calculation result and the volume of the catalyst of the gasoline vehicle particulate filter, the increase in weight per unit volume of the mixed weight relative to the original weight can be obtained.

[0056] Alternatively, the above difference calculation and quotient calculation can be obtained by the following formula:

[0057] M = (m2 - m1) / V;

[0058] Where m1 can be used to represent the original weight of the catalyst in the gasoline vehicle particulate filter, m2 can be used to represent the mixed weight of the catalyst in the gasoline vehicle particulate filter, and V can be used to represent the volume of the catalyst in the gasoline vehicle particulate filter.

[0059] As an optional embodiment, the processing method further includes: the average median diameter of the atomized particles of the atomized gas is within a threshold range of the average median diameter of the atomized particles.

[0060] In this embodiment, the average median diameter of the atomized particles of the atomized gas can be within the threshold range of the average median diameter of the atomized particles, wherein the threshold range of the average median diameter of the atomized particles can be 2μm to 3.5μm, and the proportion of particles smaller than 5μm in the atomized particles is greater than 70%.

[0061] Optionally, when the average median diameter of the atomized particles of the atomized gas is 2 μm, the proportion of particles smaller than 5 μm is 72%; when the average median diameter of the atomized particles of the atomized gas is 3.5 μm, the proportion of particles smaller than 5 μm is 75%; when the average median diameter of the atomized particles of the atomized gas is 3 μm, the proportion of particles smaller than 5 μm is 76%; and when the average median diameter of the atomized particles of the atomized gas is 2.5 μm, the proportion of particles smaller than 5 μm is 75%. These are merely illustrative examples and are not specifically limited.

[0062] In this embodiment, a jet atomization of the mixed dispersion is performed using an atomizer to obtain atomized gas. This atomized gas is then heated to obtain heated atomized gas. The catalyst of the gasoline vehicle particulate filter, into which the heated atomized gas is to be fed, is dried and cooled. The dried and cooled catalyst is then weighed to obtain its initial weight. The heated atomized gas is then fed into the gasoline vehicle particulate filter catalyst fixed at the outlet of the conveying pipe. The catalyst that has already received the heated atomized gas is dried and cooled again, and the dried and cooled catalyst is weighed to obtain the mixed weight. Based on the mixed weight and the initial weight, the increase in weight per unit volume of the mixed weight relative to the initial weight is determined. The method involves determining the relationship between the increase in weight per unit volume and a weight threshold range. If the increase in weight is not within the weight threshold range, heated atomized gas continues to flow into the gasoline vehicle particulate filter catalyst until the increase in weight falls within the weight threshold range. If the increase in weight is within the weight threshold range, it is determined that sol particles are attached to the internal pore walls of the gasoline vehicle particulate filter catalyst. This results in a gasoline vehicle particulate filter catalyst with sol particles attached to its pore walls, achieving a similar purpose to ash accumulation. This solves the technical problem of improving the PN capture rate of gasoline vehicle particulate filter catalysts and achieves the technical effect of improving the PN capture rate of gasoline vehicle particulate filter catalysts.

[0063] Example 2

[0064] The technical solutions of the embodiments of the present invention will be illustrated below with reference to preferred embodiments.

[0065] In current real-world vehicle emission tests, gasoline particulate filters (PN filters) are typically installed in the vehicle's exhaust aftertreatment system to capture particulate matter in the exhaust. However, the testing conditions on actual roads are uncertain, making it difficult to guarantee that the number of particles in the exhaust meets national emission standards. This leads to the technical problem of needing to improve the PN capture rate of gasoline particulate filter catalysts. Therefore, a method for treating gasoline particulate filter catalysts is needed to ensure an improvement in their PN capture rate.

[0066] One related technology discloses a catalyst coating method that balances low exhaust back pressure and high catalytic efficiency. This method involves taking a catalyst support divided axially into a front section and a rear section, coating the catalyst wall of the front section with a slurry containing a non-precious metal catalyst, and coating the catalyst interior of the rear section. Subsequent post-processing yields a particulate filter product loaded with a non-precious metal catalyst. However, this method only achieves the particulate filter product by simultaneously coating the wall and interior with non-precious metal catalysts. It cannot allow heated atomized gas to flow into the interior of the gasoline vehicle particulate filter catalyst, thus making it difficult to guarantee an improvement in the PN capture rate of the gasoline vehicle particulate filter catalyst.

[0067] However, this invention proposes a method to improve the PN collection performance of existing gasoline vehicle particulate filter catalysts. By atomizing and heating the modified sol compound solution, the sol compound is converted into corresponding oxide particulate aerosols, which then diffuse and uniformly accumulate on the internal pore walls of the gasoline vehicle particulate filter catalyst, achieving a similar purpose to ash accumulation. This solves the technical problem that the PN collection rate of gasoline vehicle particulate filter catalysts needs to be improved.

[0068] Figure 2 This is a flowchart of a treatment method for improving the PN trapping performance of catalysts in existing gasoline vehicle particulate filters according to an embodiment of the present invention, as shown below. Figure 2 As shown, the method for treating the catalyst in a gasoline vehicle particulate filter may include the following steps:

[0069] Step S201: The sol compound is dispersed in deionized water to form a dispersion, wherein the mass fraction of the sol compound in the dispersion is 20% to 30%.

[0070] In step S202, a regulator of 1% to 5% relative to the mass of the sol compound is added to the dispersion obtained in step S201, and the mixture is stirred until homogeneous.

[0071] Step S203: Place the dispersion obtained in step S202 into an atomizer and atomize the dispersion by jet atomization. Introduce the atomized gas into a conveying pipe, wherein the forward speed of the atomized gas in the conveying pipe is controlled between 1 m / s and 2 m / s.

[0072] Step S204: The atomized gas introduced into the delivery pipe is heated by electric heating, with the heating temperature controlled between 100°C and 150°C, and the residence time of the atomized gas in the heating area controlled between 1 second and 5 seconds.

[0073] Step S205: Dry the catalyst of the gasoline vehicle particulate filter at 100°C to 120°C for 1 to 2 hours, then place it in a desiccant to cool to room temperature and weigh it, recording the weight as m1. Then fix its intake end face to the outlet of the transmission pipe through an air seal device.

[0074] In step S206, the atomized gas, after being heated in step S204, flows into the catalyst of the gasoline vehicle particulate filter, which has been fixed in step S205.

[0075] Step S207: Remove the gasoline vehicle particulate filter catalyst after step S206 from the gas sealing device, dry it at 100°C to 120°C for 1 to 2 hours, then place it in a desiccator to cool to room temperature and weigh it. The weight is recorded as m2.

[0076] Step S208: Calculate the weight increase per unit volume M, where M = (m2 - m1) / V, and V can be the volume of the gasoline vehicle particulate filter catalyst. When the value of M is between 3 g / L and 5 g / L, the treatment of the gasoline vehicle particulate filter catalyst is complete.

[0077] Optionally, the sol compound in step S201 can be any one of aluminum sol, titanium sol, and zirconium sol, wherein the mass fraction of aluminum sol, titanium sol, and zirconium sol is 30% to 40%, the regulator in step S202 can be any one of ammonium oleate, ammonium acetate, and ammonium aminosulfonate, and the atomized gas in step S203 has an average median diameter of 2 μm to 3.5 μm, and the proportion of atomized particles smaller than 5 μm is greater than 70%.

[0078] For example, a gasoline vehicle particulate filter carrier with dimensions of 132.1mm × 127mm, a mesh size of 300 mesh, a pore wall thickness of 203.2μm, a porosity of 65%, an average pore diameter of 18μm, and a volume of 1.741L can be selected. This gasoline vehicle particulate filter carrier is coated with a catalytic coating at a concentration of 80g / L. The catalytic coating contains the noble metals Pt and Rh, with each content being 5g / ft. 3 and 2g / ft 3 .

[0079] The following four examples further illustrate the treatment methods for catalysts in gasoline vehicle particulate filters.

[0080] Example 1: The treatment method for the catalyst in a gasoline vehicle particulate filter can be achieved through the following steps:

[0081] Step 11: Disperse 30% by mass aluminum sol in deionized water to form a dispersion, wherein the mass fraction of aluminum sol in the dispersion is 30%.

[0082] Step 12: Add 5% (by mass) of ammonium oleate to the dispersion obtained in step 11, and stir until homogeneous.

[0083] Step 13: Place the dispersion obtained in Step 12 into an atomizer and atomize the dispersion by jet atomization. The average median diameter of the atomized particles is 2 μm, and the proportion of atomized particles smaller than 5 μm is 72%. The atomized gas is introduced into the conveying pipe, wherein the forward speed of the atomized gas in the conveying pipe is controlled at 1 m / s.

[0084] Step fourteen: Heat the atomized gas introduced into the delivery pipe by electric heating, with the heating temperature controlled at 100℃ and the residence time of the atomized gas in the heating area controlled at 5s.

[0085] Step 15: Dry the catalyst of the gasoline vehicle particulate filter at 100°C for 2 hours, then place it in a desiccator to cool to room temperature and weigh it. Record the weight as m1. Then fix its intake end face to the outlet of the transmission pipe through an air seal device.

[0086] Step 16: The atomized gas, after being heated in Step 14, flows into the catalyst of the gasoline vehicle particulate filter, which has been fixed in Step 15.

[0087] Step 17: Remove the catalyst from the gasoline vehicle particulate filter after step 16 from the gas seal device, dry it at 100°C for 2 hours, then place it in a desiccator to cool to room temperature and weigh it. The weight is recorded as m2.

[0088] Step 18: Calculate the increase in weight per unit volume M. After processing in steps 11 to 17 above, we get: M = (m2 - m1) / 1.741 = 3.3 g / L, thus completing the treatment of the catalyst in the gasoline vehicle particulate filter.

[0089] Example 2: The treatment method for the catalyst in a gasoline vehicle particulate filter can also be achieved through the following steps:

[0090] Step 21: Disperse 40% by mass of titanium sol in deionized water to form a dispersion, wherein the mass fraction of aluminum sol in the dispersion is 20%.

[0091] Step 22: Add ammonium acetate at a relative mass of 1% of the sol compound to the dispersion obtained in step 21, and stir until homogeneous;

[0092] Step 23: Place the dispersion obtained in step 22 into an atomizer and atomize the dispersion by jet atomization. The average median diameter of the atomized particles is 3.5 μm, and the proportion of atomized particles smaller than 5 μm is 75%. The atomized gas is introduced into the conveying pipe, wherein the forward speed of the atomized gas in the conveying pipe is controlled at 2 m / s.

[0093] Step 24: Heat the atomized gas introduced into the delivery pipe by electric heating, with the heating temperature controlled at 150℃ and the residence time of the atomized gas in the heating area controlled at 1 second.

[0094] Step 25: Dry the catalyst of the gasoline vehicle particulate filter at 120°C for 1 hour, then place it in a desiccator to cool to room temperature and weigh it, recording the weight as m1. Then fix its intake end face to the outlet of the transmission pipe through an air seal device.

[0095] Step 26: The atomized gas, after being heated in step 24, flows into the catalyst of the gasoline vehicle particulate filter, which has been fixed in step 25.

[0096] Step 27: Remove the catalyst from the gasoline vehicle particulate filter after step 26, dry it at 120°C for 1 hour, then place it in a desiccator to cool to room temperature and weigh it. The weight is recorded as m2.

[0097] Step 28: Calculate the increase in weight per unit volume M. After processing through steps 21 to 27 above, we get: M = (m2 - m1) / 1.741 = 4.2 g / L, thus completing the treatment of the catalyst in the gasoline vehicle particulate filter.

[0098] Example 3: The treatment method for the catalyst in a gasoline vehicle particulate filter can also be achieved through the following steps:

[0099] Step 31: Disperse 35% zirconium sol in deionized water to form a dispersion, wherein the mass fraction of aluminum sol in the dispersion is 30%.

[0100] Step 32: Add 3% (by mass) of ammonium aminosulfonate to the dispersion obtained in step 32 and stir until homogeneous.

[0101] Step 33: Place the dispersion obtained in step 32 into an atomizer and atomize the dispersion by jet atomization. The atomized particles have an average median diameter of 3 μm and the proportion of atomized particles smaller than 5 μm is 76%. The atomized gas is introduced into the conveying pipe, wherein the forward speed of the atomized gas in the conveying pipe is controlled at 2 m / s.

[0102] Step 34: Heat the atomized gas introduced into the delivery pipe by electric heating, with the heating temperature controlled at 120℃ and the residence time of the atomized gas in the heating area controlled at 3s.

[0103] Step 35: Dry the catalyst of the gasoline vehicle particulate filter at 120°C for 1 hour, then place it in a desiccator to cool to room temperature and weigh it. Record the weight as m1. Then fix its intake end face to the outlet of the transmission pipe through an air seal device.

[0104] Step 36: The atomized gas, after being heated in step 34, flows into the catalyst of the gasoline vehicle particulate filter, which has been fixed in step 35.

[0105] Step 37: Remove the catalyst from the gasoline vehicle particulate filter after step 36, dry it at 120°C for 1 hour, then place it in a desiccator to cool to room temperature and weigh it. The weight is recorded as m2.

[0106] Step 38: Calculate the increase in weight per unit volume M. After processing through steps 31 to 37 above, we get: M = (m2 - m1) / 1.741 = 3.8 g / L, thus completing the treatment of the catalyst in the gasoline vehicle particulate filter.

[0107] Example 4: The treatment method for the catalyst in a gasoline vehicle particulate filter can also be achieved through the following steps:

[0108] Step 41: Disperse 40% by mass aluminum sol in deionized water to form a dispersion, wherein the mass fraction of aluminum sol in the dispersion is 30%.

[0109] Step 42: Add ammonium aminosulfonate at a mass of 2% relative to the sol compound to the dispersion obtained in step 41, and stir until homogeneous.

[0110] Step 43: Place the dispersion obtained in step 42 into an atomizer and atomize the dispersion by jet atomization. The average median diameter of the atomized particles is 2.5 μm, and the proportion of atomized particles smaller than 5 μm is 75%. The atomized gas is introduced into the conveying pipe, wherein the forward speed of the atomized gas in the conveying pipe is controlled at 2 m / s.

[0111] Step 44: Heat the atomized gas introduced into the delivery pipe by electric heating, with the heating temperature controlled at 130℃ and the residence time of the atomized gas in the heating area controlled at 2s.

[0112] Step 45: Dry the catalyst of the gasoline vehicle particulate filter at 120°C for 1 hour, then place it in a desiccant to cool to room temperature and weigh it, recording the weight as m1. Then fix its intake end face to the outlet of the transmission pipe through an air seal device.

[0113] Step 46: The atomized gas, after being heated in step 44, flows into the catalyst of the gasoline vehicle particulate filter, which has been fixed in step 45.

[0114] Step 47: Remove the catalyst from the gasoline vehicle particulate filter after step 46, dry it at 120°C for 1 hour, then place it in a desiccator to cool to room temperature and weigh it. The weight is recorded as m2.

[0115] Step 48: Calculate the increase in weight per unit volume M. After processing through steps 41 to 47 above, we get: M = (m2 - m1) / 1.741 = 4.3 g / L, thus completing the treatment of the catalyst in the gasoline vehicle particulate filter.

[0116] Optionally, the comparative example is a gasoline vehicle particulate filter catalyst that has not been treated by the method of this application, and its parameters are the same as the catalyst parameters of the four examples above before treatment.

[0117] Optionally, the gasoline vehicle particulate filter catalysts obtained through the above four examples and comparative examples were installed in the exhaust pipes of the test vehicles. The placement was a close-coupled configuration. The test vehicles were 1.5L light-duty vehicles meeting China VI emission standards (Category I vehicles). A three-way catalyst was installed at the front end of each gasoline vehicle particulate filter catalyst, and the three-way catalyst configurations were identical for all test schemes. Vehicle pollutant emission tests were conducted according to the Type I test requirements specified in GB18352.6-2016. The test results for PN emissions and typical gaseous pollutants (CO, THC, and NOx) emitted by each scheme are shown in Table 1 below.

[0118] Table 1. Emissions Test Table for China VI Type I

[0119]

[0120] As shown in Table 1 above, the PN capture efficiency of the gasoline vehicle particulate filter catalyst is significantly improved by applying the treatment method proposed in this application. The PN emissions of the Type I test of each example scheme are all below 1.0E+11 # / km, which is about 70.4% lower than the PN emissions of the comparative example scheme on average. Furthermore, the treatment method provided by this invention does not have a negative impact on catalytic performance. The typical gaseous pollutant emissions of each example scheme are comparable to those of the comparative example scheme.

[0121] Optionally, the gasoline vehicle particulate filter catalysts obtained through the above four examples and comparative examples were installed in the exhaust pipes of the test vehicles. The placement was a tight coupling position. The test vehicles were 1.5L light-duty vehicles meeting China VI emission standards (Category I vehicles). A three-way catalyst was installed at the front end of each gasoline vehicle particulate filter catalyst, and the three-way catalyst schemes were identical for all test schemes. The vehicle PN emission test was conducted according to the RDE test requirements specified in GB18352.6-2016. The total stroke PN emission test results for each scheme are shown in Table 2 below.

[0122] Table 2 Emission Test Table for China VI II Type Test (RDE)

[0123]

[0124] As shown in Table 2 above, the application of the treatment method proposed in this application significantly improves the PN capture efficiency of the gasoline vehicle particulate filter catalyst. The PN emissions of the Type II test of each example scheme are all below 1.0E+12 # / km, which is about 66.4% lower than the PN emissions of the comparative example on average. The PN emissions of the Type II test of each example scheme are all below the China VI (b) limit, while the PN emissions of the Type II test of the comparative example scheme slightly exceed the China VI (b) limit.

[0125] In this embodiment, a sol compound is dispersed in deionized water to form a dispersion. A regulator, at a relative mass of 1% to 5% of the sol compound, is added to the dispersion and stirred until homogeneous. The resulting mixture is placed in an atomizer and atomized using a jet atomization method. The atomized gas is then introduced into a delivery pipe and heated electrically. The gasoline particulate filter catalyst, which is to be fed into the heated atomized gas, is dried and cooled. The dried and cooled catalyst is then weighed to obtain its original weight. The heated atomized gas flows into the gasoline vehicle particulate filter catalyst fixed at the outlet of the transmission pipe. The gasoline vehicle particulate filter catalyst that has been fed with heated atomized gas is dried and cooled, and the dried and cooled gasoline vehicle particulate filter catalyst is weighed to obtain the mixed weight. Based on the mixed weight and the original weight, the increase in weight per unit volume of the mixed weight relative to the original weight is determined. This solves the technical problem that the PN capture rate of gasoline vehicle particulate filter catalyst needs to be improved, and achieves the technical effect of improving the PN capture rate of gasoline vehicle particulate filter catalyst.

[0126] Example 3

[0127] According to an embodiment of the present invention, a processing apparatus for a gasoline vehicle particulate filter catalyst is also provided. It should be noted that this processing apparatus for a gasoline vehicle particulate filter catalyst can be used to perform a processing method for a gasoline vehicle particulate filter catalyst as described in Example 1.

[0128] Figure 3 This is a schematic diagram of a catalyst treatment device for a gasoline vehicle particulate filter according to an embodiment of the present invention. Figure 3 As shown, the processing device 300 for the catalyst of the gasoline vehicle particulate filter may include: an atomization unit 301, a heating unit 302, a weighing unit 303, a determination unit 304, and a response unit 305.

[0129] The atomizing unit 301 is used to perform jet atomization on the mixed dispersion to obtain the atomized gas of the mixed dispersion.

[0130] Heating unit 302 is used to heat the atomized gas to obtain heated atomized gas.

[0131] Weighing unit 303 is used to dry and cool the gasoline vehicle particulate filter catalyst that is to be flowed into the heated atomized gas, and to weigh the gasoline vehicle particulate filter catalyst after drying and cooling to obtain the original weight. It is also used to dry and cool the gasoline vehicle particulate filter catalyst that has flowed into the heated atomized gas, and to weigh the gasoline vehicle particulate filter catalyst after drying and cooling to obtain the mixed weight.

[0132] The determining unit 304 is used to determine the increase in weight per unit volume of the mixed weight relative to the original weight.

[0133] The response unit 305 is used to determine that sol particles are attached to the internal pore walls of the gasoline vehicle particulate filter catalyst in response to the fact that the increase in weight per unit volume is within the weight threshold range.

[0134] Optionally, the processing device 300 for the gasoline vehicle particulate filter catalyst may further include: a mixing unit for adding a regulator to a dispersion and uniformly stirring the dispersion to obtain a mixed dispersion, wherein the regulator includes at least one of ammonium oleate, ammonium acetate and ammonium aminosulfonate.

[0135] Optionally, the processing device 300 for the gasoline vehicle particulate filter catalyst may further include: a dispersion unit for dispersing the sol compound in deionized water to obtain a dispersion, wherein the sol compound includes at least one of aluminum sol, titanium sol and zirconium sol.

[0136] Optionally, the determining unit 304 may include: a first calculation module for obtaining the difference between the mixed weight and the original weight; and a second calculation module for determining the quotient between the difference and the volume of the gasoline vehicle particulate filter catalyst as the increase in weight of the gasoline vehicle particulate filter catalyst per unit volume.

[0137] Optionally, the processing device 300 for the gasoline vehicle particulate filter catalyst may further include: a limiting unit for ensuring that the average median diameter of the atomized particles of the atomized gas is within a threshold range of the average median diameter of the atomized particles.

[0138] In this embodiment, an atomization unit is used to atomize the mixed dispersion liquid in a jet manner to obtain atomized gas of the mixed dispersion liquid; a heating unit is used to heat the atomized gas to obtain heated atomized gas; a weighing unit is used to dry and cool the gasoline vehicle particulate filter catalyst to be fed into the heated atomized gas, and weigh the dried and cooled gasoline vehicle particulate filter catalyst to obtain the original weight, and dry and cool the gasoline vehicle particulate filter catalyst that has been fed into the heated atomized gas, and weigh the dried and cooled gasoline vehicle particulate filter catalyst to obtain the mixed weight; a determination unit is used to determine the increase in weight of the mixed weight relative to the original weight per unit volume; a response unit is used to determine that the internal pore walls of the gasoline vehicle particulate filter catalyst are adhered with sol particles in response to the increase in weight per unit volume being within the weight threshold range, thereby solving the technical problem that the PN capture rate of the gasoline vehicle particulate filter catalyst needs to be improved, and achieving the technical effect of improving the PN capture rate of the gasoline vehicle particulate filter catalyst.

[0139] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0140] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0141] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual couplings, direct couplings, or communication connections may be through some interfaces; indirect couplings or communication connections between units or modules may be electrical or other forms.

[0142] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0143] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0144] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0145] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method of treating a gasoline particulate filter catalyst, characterized by, The method comprises: performing jet atomization on the mixed dispersion liquid to obtain atomized gas of the mixed dispersion liquid, wherein an average median diameter of atomized particles of the atomized gas is within a threshold interval of the average median diameter of the atomized particles, the threshold interval of the average median diameter of the atomized particles is 2 μm to 3.5 μm, and a proportion of particles with a size less than 5 μm in the atomized particles is greater than 70%; and heating the atomized gas to obtain heated atomized gas, wherein a heating temperature of the atomized gas is controlled to be 100°C to 150°C, and a residence time of the atomized gas in a heating area is 1 s to 5 s; drying and cooling the gasoline vehicle particulate filter catalyst to be flowed into the heated atomized gas, and weighing the dried and cooled gasoline vehicle particulate filter catalyst to obtain an original weight; flowing the heated atomized gas into the gasoline vehicle particulate filter catalyst fixed at an outlet of a conveying pipeline, drying the gasoline vehicle particulate filter catalyst having flowed into the heated atomized gas at a temperature of 100°C to 120°C, then cooling the gasoline vehicle particulate filter catalyst, and weighing the dried and cooled gasoline vehicle particulate filter catalyst to obtain a mixed weight; determining an increase weight of the mixed weight relative to the original weight per unit volume; in response to the increase weight per unit volume being within a weight threshold interval, determining that sol micro-particles are attached to an inner channel wall of the gasoline vehicle particulate filter catalyst.

2. The method of claim 1, wherein, Before performing jet atomization on the mixed dispersion liquid to obtain atomized gas of the mixed dispersion liquid, the method further comprises: adding an adjusting agent to the dispersion liquid and uniformly stirring the dispersion liquid to obtain the mixed dispersion liquid, wherein the adjusting agent comprises at least one of ammonium oleate, ammonium acetate, and ammonium sulfamate.

3. The method of claim 2, wherein, Before adding an adjusting agent to the dispersion liquid and uniformly stirring the dispersion liquid to obtain the mixed dispersion liquid, the method further comprises: dispersing a sol compound in deionized water to obtain the dispersion liquid, wherein the sol compound comprises at least one of an aluminum sol, a titanium sol, and a zirconium sol.

4. The method of claim 1, wherein, Determining the increase weight of the mixed weight relative to the original weight per unit volume comprises: obtaining a difference between the mixed weight and the original weight; determining a quotient between the difference and a volume of the gasoline vehicle particulate filter catalyst as the increase weight of the gasoline vehicle particulate filter catalyst per unit volume.

5. A gasoline particulate filter catalyst treatment device characterized by, The method comprises: an atomization unit configured to perform jet atomization on a mixed dispersion liquid to obtain atomized gas of the mixed dispersion liquid, wherein an average median diameter of atomized particles of the atomized gas is within a threshold interval of the average median diameter of the atomized particles, the threshold interval of the average median diameter of the atomized particles is 2 μm to 3.5 μm, and a proportion of particles with a size less than 5 μm in the atomized particles is greater than 70%; a heating unit configured to heat the atomized gas to obtain heated atomized gas, wherein a heating temperature of the atomized gas is controlled to be 100°C to 150°C, and a residence time of the atomized gas in a heating area is 1 s to 5 s; and a weighing unit configured to dry and cool the gasoline vehicle particulate filter catalyst to be flowed into the heating atomization gas, and to weigh the dried and cooled gasoline vehicle particulate filter catalyst to obtain an original weight, dry the gasoline vehicle particulate filter catalyst that has been flowed into the heating atomization gas at a temperature of 100-120°C, then cool the gasoline vehicle particulate filter catalyst, and weigh the dried and cooled gasoline vehicle particulate filter catalyst to obtain a mixed weight; a determination unit configured to determine an increase in weight per unit volume of the mixed weight relative to the original weight; a response unit configured to determine that sol micro-particles are attached to an inner pore wall of the gasoline vehicle particulate filter catalyst in response to the increase in weight per unit volume being within a weight threshold interval.

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