Monolithic catalyst and granular catalyst equivalent test method and device

Abstract

The invention belongs to the field of catalyst testing, and particularly relates to an equivalent testing method and device for a monolithic catalyst and a granular catalyst, and the method comprises the following steps: S1, obtaining the monolithic catalyst and the granular catalyst with the same active component loading capacity; s2, obtaining a fully equivalent granular catalyst; and S3, carrying out catalytic performance test on the monolithic catalyst and the fully-equivalent particle type catalyst, and comparing the performance of the monolithic catalyst and the performance of the particle type catalyst. According to the equivalent test method for the monolithic catalyst and the granular catalyst, the fully-equivalent granular catalyst which is consistent with the monolithic catalyst in active ingredient loading capacity, flow resistance, filling height and substrate contact duration is obtained through the steps, and finally, the performance of the fully-equivalent granular catalyst and the performance of the monolithic catalyst are compared. And the efficiency evaluation on the monolithic catalyst and the granular catalyst under the same condition is realized.

Description

Technical Field

[0001] The invention belongs to the field of catalyst testing, and in particular relates to a method and a device for equivalent testing of an integral catalyst and a particle-type catalyst. Background Art

[0002] When comparing the catalytic performance of granular catalysts and monolithic catalysts, due to the inconsistent carrier morphology, there are large differences in the filling height, porosity, etc. of the two filled in the catalytic test device, which in turn causes problems such as the gas pressure drop generated by the test gas in different bed layers and the different contact time with the active ingredients. Without a unified evaluation standard, it is impossible to judge the catalytic performance of the two types of catalysts.

[0003] Specifically, if the mass of active metals is used as a uniform standard, when the loading amount is the same, since the granular catalyst is arranged more densely, the height of the particles after arrangement is much lower than that of the monolithic catalyst, the contact time is shortened, and the airflow resistance will also increase due to the dense arrangement; if the same filling height is used as the standard, the amount of granular catalyst used will be much higher than that of the monolithic catalyst.

[0004] It can be seen that there are still certain difficulties in comparing the catalytic performance of different types of catalysts, and there is still a lack of a method to evaluate the performance of two types of catalysts under equal conditions. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a method and device for equivalent testing of integral catalysts and granular catalysts for testing integral catalysts and granular catalysts under equal conditions.

[0006] The present invention provides a method for testing the equivalence of a monolithic catalyst and a granular catalyst, comprising the following steps: S1, obtaining a monolithic catalyst and a granular catalyst with the same active component loading; S2, obtaining a fully equivalent granular catalyst; S21, using a flow resistance testing device to test the flow resistance of the monolithic catalyst to obtain the flow resistance of the monolithic catalyst; S22, placing the granular catalyst into the inner cavity of a catalyst installation sleeve whose inner cavity size is consistent with the outer size of the monolithic catalyst, and adding hollow filling bodies and solid filling bodies into the inner cavity of the catalyst installation sleeve until the granular catalyst, the hollow filling bodies and the solid filling bodies fill the catalyst installation sleeve, and the catalyst installation sleeve, the granular catalyst, the hollow filling bodies and the solid filling bodies form a granular catalyst with equivalent size; S23, using a flow resistance testing device to test the flow resistance of the size-equivalent granular catalyst, adjusting the ratio of the hollow filler body to the solid filler body until the flow resistance of the size-equivalent granular catalyst is consistent with the flow resistance of the monolithic catalyst, and obtaining a fully equivalent granular catalyst; S3, catalytic performance tests are conducted on the monolithic catalyst and the fully equivalent granular catalyst to compare the performance of the monolithic catalyst with that of the granular catalyst.

[0007] Furthermore, the S21 further includes: Placing the monolithic catalyst into the inner cavity of a catalyst installation sleeve whose inner cavity size is consistent with the outer size of the monolithic catalyst; Obtaining the flow resistance of the monolithic catalyst includes the flow resistance of the catalyst mounting sleeve.

[0008] Furthermore, the S23 further includes: Obtaining the flow resistance of the catalyst mounting sleeve; The flow resistance of the size-equivalent particle-type catalyst is the total flow resistance minus the flow resistance of the catalyst mounting sleeve.

[0009] Furthermore, the monolithic catalyst and the granular catalyst for obtaining the same active ingredient loading amount include: Calculating the active component loading of the monolithic catalyst according to the mass and loading rate of the monolithic catalyst; The mass of the particle-type catalyst is calculated based on the loading rate of a single particle in the particle-type catalyst and the loading amount of the active component of the monolithic catalyst; The active component loading amount of the pelletized catalyst and the monolithic catalyst is the same as that of the monolithic catalyst.

[0010] Furthermore, the catalytic performance test of the monolithic catalyst and the fully equivalent granular catalyst includes: The N2O decomposition tests were carried out on the monolithic catalyst and the fully equivalent pellet-type catalyst.

[0011] The present invention also provides an integral catalyst and granular catalyst equivalent testing device for performing the above-mentioned integral catalyst and granular catalyst equivalent testing method, comprising a catalyst mounting sleeve, a hollow filling body, a solid filling body, a flow resistance testing device and a catalytic performance testing device.

[0012] Furthermore, the catalyst installation sleeve is hollow inside and has an inner cavity, and the size of the inner cavity is consistent with the outer size of the monolithic catalyst; At least one end wall of the catalyst installation sleeve is provided with a mesh plate for air permeability.

[0013] Furthermore, the outer dimensions of the hollow filler and the solid filler are consistent with the outer dimensions of a single particle of the particle-type catalyst.

[0014] Furthermore, the hollow filling body includes two circular rings arranged opposite to each other and a plurality of connecting columns arranged in a circular array between the two circular rings and connecting the two circular rings.

[0015] Furthermore, the catalytic performance testing device includes a reactor for installing the integral catalyst or the fully equivalent granular catalyst, a gas supply device is arranged on one side of the reactor, and a gas chromatograph is arranged on the other side.

[0016] The beneficial effect of the present invention is that the equivalent testing method of the monolithic catalyst and the granular catalyst of the present invention obtains a fully equivalent granular catalyst having the same active ingredient loading, flow resistance, filling height, and substrate contact time as the monolithic catalyst through the above steps, and finally compares the performance of the fully equivalent granular catalyst and the monolithic catalyst, thereby achieving the performance evaluation of the monolithic catalyst and the granular catalyst under the same conditions. The problem of the current lack of a method for evaluating the performance of monolithic catalysts and granular catalysts under equal conditions is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Attached Figure 1 It is a schematic diagram of the flow chart of the testing method in the present invention; Attached Figure 2 It is a schematic diagram of the catalytic performance testing device in the present invention; Attached Figure 3 It is a schematic diagram of the structure of the integral catalyst in the present invention; Attached Figure 4 is a front cross-sectional view of the integral catalyst of the present invention (the dimensions in the figure are in mm); Attached Figure 5 This is a schematic diagram of the structure of the catalyst installation sleeve in the present invention; Attached Figure 6 This is a front cross-sectional view of the catalyst installation sleeve in the present invention (the dimensions in the figure are in mm) Attached Figure 7 It is a schematic diagram of the structure of the hollow filling body in the present invention; Attached Figure 8 A top view of the hollow filling body of the present invention (the dimensions in the figure are in mm); Attached Fig. 9 This is a front view of the hollow filling body of the present invention (the dimensions in the figure are in mm); Attached Fig.10 It is a schematic diagram of the structure of the solid filling body or particles in the present invention; Attached Fig.11A top view of a solid filler or particle in the present invention (the dimensions in the figure are in mm); Attached Fig.12 This is a front view of a solid filler or particle in the present invention (the dimensions in the figure are in mm); Attached Fig.13 This is a schematic diagram of the monolithic catalyst of the present invention after being loaded into the catalyst installation sleeve; Attached Fig.14 It is a schematic diagram of a fully equivalent particle-type catalyst in the present invention; Attached Fig.15 This is a comparison chart of the N2O catalytic decomposition performance of a monolithic catalyst, a fully equivalent granular catalyst, a pure filler, and an unloaded monolithic catalyst as the temperature changes.

[0018] In the figure, 1-catalyst mounting sleeve; 11-mesh plate; 2-hollow filling body; 21-ring; 22-connecting column; 3-solid filling body; 4-catalytic performance testing device; 41-gas cylinder; 42-flow meter; 43-reactor; 44-gas chromatograph; 45-heating furnace; 46-computer; 5-integral catalyst; 6-granular catalyst; 61-granules. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0021] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0022] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, a physical connection, or a wireless communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0024] As attached Figure 1 -Attached Fig.15 As shown, the present invention provides a method for testing the equivalence of a monolithic catalyst and a granular catalyst, comprising the following steps: S1, obtaining a monolithic catalyst 5 and a granular catalyst 6 with the same active component loading, wherein the granular catalyst 6 is composed of a plurality of granules 61; S2, obtaining a fully equivalent granular catalyst, wherein the active component loading, flow resistance, filling height, and substrate contact time of the fully equivalent granular catalyst and the integral catalyst 5 are all kept consistent, thereby achieving catalytic performance testing and comparison of different types of catalysts under the same conditions and the same standard, which facilitates the performance evaluation of different types of catalysts under equal conditions; The steps of obtaining a fully equivalent granular catalyst include: S21, using a flow resistance testing device to test the flow resistance of the monolithic catalyst 5 to obtain the flow resistance of the monolithic catalyst 5; S22, placing the granular catalyst 6 into the inner cavity of the catalyst mounting sleeve 1 whose inner cavity size is consistent with the outer size of the integral catalyst 5. Since the volume of the granular catalyst 6 in the integral catalyst 5 and the granular catalyst 6 with the same active ingredient loading is much smaller than that of the integral catalyst 5, there is still a lot of remaining space in the inner cavity after the granular catalyst 6 is filled into the inner cavity. At this time, add the hollow filling body 2 and the solid filling body 3 into the inner cavity of the catalyst mounting sleeve 1 until the granular catalyst 6, the hollow filling body 2 and the solid filling body 3 fill the catalyst mounting sleeve 1. The catalyst installation sleeve 1, the granular catalyst 6, the hollow filler 2 and the solid filler 3 form a size-equivalent granular catalyst, wherein the hollow filler 2 and the solid filler 3 are used to supplement the space in the inner cavity, and after being mixed with the granular catalyst 6, the particles 61 of the granular catalyst 6 are evenly distributed in the inner cavity, ensuring that the granular catalyst 6 has the same active ingredient loading as the integral catalyst 5, and its filling height and substrate contact time are also consistent. In addition, the ratio of the hollow filler 2 and the solid filler 3 can be adjusted to ultimately ensure that the flow resistance of the two is consistent. At this time, the active ingredient loading, filling height, and substrate contact time of the size-equivalent granular catalyst and the integral catalyst 5 are consistent, and the flow resistance may also be different; S23, using a flow resistance testing device to test the flow resistance of the size-equivalent granular catalyst; at this time, if the flow resistance of the size-equivalent granular catalyst may be significantly different from that of the integral catalyst 5, when there is a significant difference, the ratio of the hollow filler 2 and the solid filler 3 is adjusted until the flow resistance of the size-equivalent granular catalyst is consistent with that of the integral catalyst 5, that is, the catalyst installation sleeve 1, the granular catalyst 6, and a specific ratio of the hollow filler 2 and the solid filler 3 form a fully equivalent granular catalyst. At this time, the active ingredient loading, flow resistance, filling height, and substrate contact time of the fully equivalent granular catalyst and the integral catalyst 5 are all consistent, and the standards of the two are consistent; S3, catalytic performance tests are performed on the integral catalyst 5 and the fully equivalent granular catalyst, the performance of the integral catalyst 5 is compared with that of the granular catalyst 6, and then the performance of the integral catalyst 5 and the granular catalyst 6 is evaluated under the same conditions.

[0025] It should be noted that the flow resistance of the size-equivalent granular catalyst is preferably completely equal to the flow resistance of the integral catalyst 5, but considering that it is difficult to adjust the flow resistance of the size-equivalent granular catalyst to be consistent with the flow resistance of the integral catalyst 5 during the actual experiment, therefore, when the flow resistance of the size-equivalent granular catalyst differs from the flow resistance of the integral catalyst 5 by a set value, it can be determined that the flow resistances of the two are consistent, and a fully equivalent granular catalyst is obtained.

[0026] The method for testing the equivalence of the monolithic catalyst and the granular catalyst of the present invention obtains a fully equivalent granular catalyst having the same active ingredient loading, flow resistance, filling height, and substrate contact time as the monolithic catalyst 5 through the above steps, and finally compares the performance of the fully equivalent granular catalyst and the monolithic catalyst, thereby achieving the performance evaluation of the monolithic catalyst 5 and the granular catalyst 6 under the same conditions. The problem of the current lack of a method for evaluating the performance of the monolithic catalyst 5 and the granular catalyst 6 under equal conditions is solved.

[0027] Since the fully equivalent granular catalyst needs to be supported by the catalyst installation sleeve 1, and the catalyst installation sleeve 1 needs the mesh plate 11 to provide ventilation while holding the granular catalyst 6, the hollow filler 2 and the solid filler 3, the flow resistance of the catalyst installation sleeve 1 is included when obtaining the flow resistance of the fully equivalent granular catalyst. In order to avoid the flow resistance of the mesh plate 11 on the catalyst installation sleeve 1 interfering with the consistency of the experimental conditions.

[0028] In one embodiment, the S21 further includes: The monolithic catalyst 5 is placed in the inner cavity of a catalyst installation sleeve 1 whose inner cavity size is consistent with the outer size of the monolithic catalyst 5; The flow resistance of the integral catalyst 5 obtained includes the flow resistance of the catalyst installation sleeve 1. At this time, the flow resistance of the integral catalyst 5 also includes the flow resistance of the mesh plate 11 of the catalyst installation sleeve 1, so that the flow resistance of the fully equivalent granular catalyst is consistent with the flow resistance of the integral catalyst 5, ensuring the consistency of the test conditions. In this embodiment, when the catalytic performance test of the integral catalyst 5 is performed, the integral catalyst 5 is also installed in the catalyst installation sleeve 1.

[0029] In another embodiment, the catalyst installation sleeve 1 is not used in the flow resistance test and the catalytic performance test of the monolithic catalyst 5. In this case, the S23 further includes: Obtaining the flow resistance of the catalyst installation sleeve 1; The flow resistance of the size-equivalent granular catalyst is the total flow resistance minus the flow resistance of the catalyst installation sleeve 1, wherein the total flow resistance is the flow resistance of the granular catalyst 6, the hollow filler 2 and the solid filler 3 plus the flow resistance of the catalyst installation sleeve 1. In this embodiment, by subtracting the flow resistance of the catalyst installation sleeve 1, the flow resistance of the fully equivalent granular catalyst is kept consistent with the flow resistance of the integral catalyst 5, ensuring consistent test conditions.

[0030] In one embodiment, the method of obtaining the same active ingredient loading amount of the monolithic catalyst 5 and the particle-type catalyst 6 comprises: According to the mass and loading rate of the monolithic catalyst 5, wherein the mass can be directly weighed and the loading rate is a known quantity, the loading amount of the active component of the monolithic catalyst 5 is calculated. Specifically, in the monolithic catalyst 5, the mass multiplied by the loading rate equals the loading amount of the active component; According to the loading rate of the single particle 61 in the particle-type catalyst 6 and the active component loading amount of the monolithic catalyst 5, wherein the active component loading amount of the monolithic catalyst 5 is calculated in the previous step and the loading rate of the single particle 61 is a known quantity, the mass of the particle-type catalyst 6 is calculated. Specifically, the mass of the particle-type catalyst 6 is equal to the active component loading amount of the monolithic catalyst 5 divided by the loading rate; The mass of the granular catalyst 6 has the same active component loading as the monolithic catalyst 5. It should be noted that when obtaining a granular catalyst 6 with the same active component loading as the monolithic catalyst 5, there is a certain error between the mass of the operating granular catalyst 6 and the theoretically required mass.

[0031] In one embodiment, the catalytic performance test of the monolithic catalyst 5 and the fully equivalent granular catalyst includes: The N2O decomposition test is performed on the monolithic catalyst 5 and the fully equivalent granular catalyst, and then the N2O decomposition rates of the monolithic catalyst 5 and the granular catalyst 6 can be obtained.

[0032] The present invention also provides an integral catalyst and granular catalyst equivalent testing device for performing the above-mentioned integral catalyst and granular catalyst equivalent testing method, comprising a catalyst mounting sleeve 1, a hollow filling body 2, a solid filling body 3, a flow resistance testing device and a catalytic performance testing device 4.

[0033] In one embodiment, the catalyst installation sleeve 1 is hollow inside and has an inner cavity, the size of the inner cavity is consistent with the outer size of the monolithic catalyst 5, the monolithic catalyst 5 preferably adopts a cylindrical structure, and similarly, the inner cavity preferably adopts a cylindrical cavity, so that the inner cavity is adapted to the monolithic catalyst 5; At least one end wall of the catalyst installation sleeve 1 is provided with a mesh plate 11 for ventilation, and the mesh plate 11 is used to hold the integral catalyst 5 or the granular catalyst 6, the hollow filler 2 and the solid filler 3 to prevent them from slipping out from the end of the catalyst installation sleeve 1.

[0034] In one of the embodiments, the outer dimensions of the hollow filling body 2 and the solid filling body 3 are consistent with the outer dimensions of a single particle 61 of the granular catalyst 6. Such a configuration can, on the one hand, facilitate mixing of the hollow filling body 2, the solid filling body 3, and the particles 61 of the granular catalyst 6 so that several particles 61 of the granular catalyst 6 are evenly distributed in the inner cavity of the catalyst mounting sleeve 1; on the other hand, it can effectively simulate the intervals between the particles 61 while ensuring the size, thereby facilitating the accuracy of flow resistance adjustment.

[0035] In one embodiment, the hollow filling body 2 includes two oppositely disposed circular rings 21 and a plurality of connecting columns 22 arranged in a circular array between the two circular rings 21 and connecting the two circular rings 21. Such a configuration can ensure that the hollow filling body 2 can effectively circulate gas while ensuring a simple structure.

[0036] In one of the embodiments, the flow resistance testing device includes a hollow cylinder, one end of the cylinder is provided with a gas injection device, the other end is provided with a gas outlet, and a pressure sensor is provided at the gas outlet. When testing the flow resistance of the integral catalyst 5, the integral catalyst 5 is embedded and placed in the hollow, and the gas injection device is used to inject gas, and the pressure sensor detects the pressure at the gas outlet. Finally, the flow resistance of the integral catalyst 5 can be calculated based on the pressure difference between the gas injection device and the pressure sensor. When testing the flow resistance of a size-equivalent granular catalyst, the catalyst mounting sleeve 1 of the size-equivalent granular catalyst is embedded and placed in the hollow, and the gas injection device is used to inject gas, and the pressure sensor detects the pressure at the gas outlet. Finally, the flow resistance of the size-equivalent granular catalyst can be calculated based on the pressure difference between the gas injection device and the pressure sensor.

[0037] In one embodiment, the catalytic performance testing device 4 includes a reactor 43 for installing the integral catalyst 5 or the fully equivalent granular catalyst, the reactor 43 is used to form a gas decomposition site, a gas flow channel is arranged inside the reactor 43, the integral catalyst 5 or the fully equivalent granular catalyst is detachably arranged in the gas flow channel, a gas supply device is arranged on one side of the reactor 43, which is used to inject gas, such as N2O, into one end of the flow channel, and a gas chromatograph 44 is arranged on the other side, which is used to detect the residual content of the gas, such as the residual content of N2O, and then test the decomposition performance of the integral catalyst 5 or the fully equivalent granular catalyst on N2O, and obtain the catalytic performance of the integral catalyst 5 and the granular catalyst 6.

[0038] Preferably, the gas supply device includes a gas cylinder 41 and a flow meter 42, the gas cylinder 41 is used to provide test gas, such as N2O, and the flow meter 42 is used to control the gas flow. Preferably, the reactor 43 is arranged in a heating furnace 45, and the heating furnace 45 is used to heat the reactor 43 to decompose the gas. Preferably, the gas chromatograph 44 is connected to a computer 46 for processing test data.

[0039] The following test is conducted using the N2O decomposition test as an example: The size of the monolithic catalyst 5 is as follows Figure 4 As shown, its mass is 1.4538 g, the loading rate is 2.93%, and the calculated loading amount is 0.0422 g. The flow resistance of the integral catalyst 5 is 3.87 KPa as tested by the flow resistance testing device.

[0040] The size of the particles 61 of the granular catalyst 6 is as follows: Fig.10 and Fig.11 As shown, the loading rate is 15.04%, the loading amount of the integral catalyst 5 is 0.0422 g, and the required mass of the particle-type catalyst 6 is calculated to be 0.2806 g.

[0041] 0.2695 g of granular catalyst 6 was actually weighed, and finally 0.2014 g of hollow filler 2 and 0.2076 g of solid filler 3 were added into the catalyst installation sleeve 1, and finally the flow resistance of the fully equivalent granular catalyst was 3.59 KPa. The size of the hollow filler 2 is as follows: Figure 8 and Fig. 9 As shown, the size of the solid filling body 3 is as follows Fig.11 and Fig.12 As shown, the size of the catalyst installation sleeve 1 is as follows Figure 6 shown.

[0042] Gas flow rate of the gas supply device: 20L / min.

[0043] The catalytic performance test device 4 was used to test the fully equivalent granular catalyst and the integral catalyst 5, and the results were obtained. Fig.15 The shown data are comparative data of N2O catalytic decomposition performance of monolithic catalyst, fully equivalent granular catalyst, pure filler and unloaded monolithic catalyst as the temperature changes.

[0044] The above is only an embodiment and does not limit the present invention in any way. Any person skilled in the art can use the above disclosed technical contents to make many possible changes, modifications or modifications to the technical solutions of the present invention into equivalent embodiments of equivalent changes without departing from the scope of the technical solutions of the present invention. Therefore, any simple modification, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall fall within the scope of protection of the technical solutions of the present invention.

Claims

1. A method for testing the equivalence of monolithic catalysts and granular catalysts, characterized in that: The steps include: S1, obtaining a monolithic catalyst (5) and a granular catalyst (6) having the same active component loading amount; S2, obtaining a fully equivalent granular catalyst; S21, using a flow resistance testing device to test the flow resistance of the monolithic catalyst (5) to obtain the flow resistance of the monolithic catalyst (5); S22, placing the granular catalyst (6) into the inner cavity of a catalyst installation sleeve (1) whose inner cavity size is consistent with the outer size of the integral catalyst (5), and adding a hollow filler (2) and a solid filler (3) into the inner cavity of the catalyst installation sleeve (1), until the granular catalyst (6), the hollow filler (2) and the solid filler (3) fill the catalyst installation sleeve (1), and the catalyst installation sleeve (1), the granular catalyst (6), the hollow filler (2) and the solid filler (3) form a granular catalyst of equivalent size; S23, using a flow resistance testing device to test the flow resistance of the size-equivalent granular catalyst, adjusting the ratio of the hollow filler (2) to the solid filler (3) until the flow resistance of the size-equivalent granular catalyst is consistent with the flow resistance of the monolithic catalyst (5), thereby obtaining a fully equivalent granular catalyst; S3, catalytic performance tests are performed on the integral catalyst (5) and the fully equivalent granular catalyst, and the performance of the integral catalyst (5) is compared with that of the granular catalyst (6).

2. The method for testing the equivalence between a monolithic catalyst and a granular catalyst as claimed in claim 1, characterized in that: The S21 further includes: The monolithic catalyst (5) is placed in the inner cavity of a catalyst installation sleeve (1) whose inner cavity size is consistent with the outer size of the monolithic catalyst (5); The flow resistance of the monolithic catalyst (5) is obtained including the flow resistance of the catalyst mounting sleeve (1).

3. The method for testing the equivalence between a monolithic catalyst and a granular catalyst as claimed in claim 1, characterized in that: The S23 further includes: Obtaining the flow resistance of the catalyst installation sleeve (1); The flow resistance of the size-equivalent particle-type catalyst is the total flow resistance minus the flow resistance of the catalyst mounting sleeve (1).

4. The method for testing the equivalence between a monolithic catalyst and a granular catalyst according to any one of claims 1 to 3, characterized in that: The method for obtaining the monolithic catalyst (5) and the particle-type catalyst (6) with the same active component loading comprises: Calculating the active component loading of the monolithic catalyst (5) according to the mass and loading rate of the monolithic catalyst (5); The mass of the particle-type catalyst (6) is calculated based on the loading rate of a single particle (61) in the particle-type catalyst (6) and the loading amount of active components in the monolithic catalyst (5); The active component loading amount of the particle-type catalyst (6) of this mass is the same as that of the monolithic catalyst (5).

5. The method for testing the equivalence between a monolithic catalyst and a granular catalyst according to any one of claims 1 to 3, characterized in that: The catalytic performance test of the monolithic catalyst (5) and the fully equivalent granular catalyst comprises: The monolithic catalyst (5) and the fully equivalent granular catalyst were tested for N2O decomposition.

6. A test device for the equivalence of monolithic catalysts and granular catalysts, characterized in that: A method for testing the equivalence of a monolithic catalyst and a granular catalyst as claimed in any one of claims 1 to 5 comprises a catalyst mounting sleeve (1), a hollow filling body (2), a solid filling body (3), a flow resistance testing device and a catalytic performance testing device (4).

7. The device for testing the equivalence between monolithic catalyst and granular catalyst as claimed in claim 6, characterized in that: The catalyst installation sleeve (1) is hollow inside and has an inner cavity, the size of the inner cavity being consistent with the outer dimensions of the monolithic catalyst (5); At least one end wall of the catalyst installation sleeve (1) is provided with a mesh plate (11) for air permeability.

8. The device for testing the equivalence between monolithic catalyst and granular catalyst as claimed in claim 7, characterized in that: The outer dimensions of the hollow filling body (2) and the solid filling body (3) are consistent with the outer dimensions of a single particle (61) of the particle-type catalyst (6).

9. The device for testing the equivalence between monolithic catalyst and granular catalyst as claimed in claim 8, characterized in that: The hollow filling body (2) comprises two circular rings (21) arranged opposite to each other and a plurality of connecting columns (22) arranged in an annular array between the two circular rings (21) and connecting the two circular rings (21).

10. The device for testing the equivalence between monolithic catalyst and granular catalyst according to any one of claims 6 to 9, characterized in that: The catalytic performance testing device (4) comprises a reactor (43) for installing the integral catalyst (5) or the fully equivalent particle-type catalyst, a gas supply device is arranged on one side of the reactor (43), and a gas chromatograph (44) is arranged on the other side.

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