Normal-temperature oxygen and hydrogen removal bifunctional catalyst as well as preparation method and application thereof

Abstract

The invention discloses a bifunctional catalyst for removing oxygen and hydrogen at normal temperature and a preparation method and application thereof, and relates to the technical field of catalysts.The preparation method comprises the following steps that a carrier material is soaked in a solution containing a cerium source, drying and calcining are conducted after a solvent is evaporated through negative pressure rotary evaporation, and a CeO2 oxygen adjusting layer modified carrier material is obtained; dipping the CeO2 oxygen regulation layer modified carrier material in a solution containing a platinum source, a palladium source and a nickel source, carrying out negative pressure rotary evaporation to remove the solvent, drying, and carrying out a reduction reaction in a hydrogen atmosphere to obtain a PtPdNi / CeO2 / carrier; and dipping the PtPdNi / CeO2 / carrier in a water repellent agent solution to obtain the normal-temperature oxygen and hydrogen removal bifunctional catalyst. The invention provides a deoxidizing and dehydrogenating bifunctional catalyst which can be operated at normal temperature, can obviously reduce energy consumption, reduce cost, improve catalytic efficiency and the like, and has excellent impurity gas poisoning resistance.

Description

Technical Field

[0001] The present invention relates to the technical field of catalysts, and in particular to a room-temperature deoxygenation and dehydrogenation dual-function catalyst, a preparation method thereof, and applications thereof. Background Art

[0002] In the field of modern industrial production and energy conversion, deoxygenation and dehydrogenation technologies are one of the key links to ensure production safety, improve product quality, and achieve efficient energy utilization. At present, the deoxygenation and dehydrogenation catalysts commonly used in the industry mainly use spherical fillers such as molecular sieves and alumina as carrier materials. The preparation process is usually as follows: the carrier material is impregnated in a solution of platinum (Pt) or palladium (Pd) compounds to uniformly load the active components on the carrier surface, followed by drying. The metal compound is then converted into a catalytically active metal element or low-valent compound through chemical reduction or atmospheric reduction, thereby obtaining the final catalyst product.

[0003] After years of development and practice, the above-mentioned preparation processes have become relatively mature and easy to implement in large-scale industrial production, thus occupying a dominant position in industrial applications. However, there are many problems that need to be solved in the actual application of this type of catalyst.

[0004] First, the catalyst is extremely sensitive to water produced during the catalytic oxidation process. Water molecules are easily adsorbed on the surface of the catalyst, occupying active sites and hindering the contact between the reactant molecules and the active centers, thereby significantly reducing the catalytic efficiency of the catalyst. In order to maintain a high catalytic activity, this type of catalyst usually needs to operate at a temperature above 100°C. This high-temperature use requirement not only increases energy consumption and increases production costs, but also requires a special cooling link in the subsequent process flow to remove water from the reaction system, further increasing the process complexity and cost investment of the system.

[0005] Secondly, in the existing technical cognition system, there is a lack of comprehensive and in-depth understanding of the overall process of catalytic oxidation reactions for oxygen removal and hydrogen removal. In particular, the key role played by the oxygen reduction process in the entire catalytic oxidation reaction process, namely the rate-determining step, has not been fully understood. Due to the failure to carry out targeted optimization and improvement of the oxygen reduction process, the rate of the entire catalytic oxidation reaction is severely limited and the catalytic efficiency is low. In order to compensate for this shortcoming, the use of precious metal catalysts has to be increased to increase the reaction rate, but this further increases the cost of the catalyst and also puts greater pressure on the environment.

[0006] Therefore, developing a dual-functional catalyst for deoxygenation and dehydrogenation that can operate efficiently at room temperature and exploring its preparation method and application process are of great practical significance for reducing energy consumption, reducing costs, improving catalytic efficiency and promoting the sustainable development of related industries. Summary of the Invention

[0007] In order to solve the above problems, the present invention provides a dual-function catalyst for deoxygenation and dehydrogenation at room temperature, and a preparation method and application thereof.

[0008] In a first aspect, the present invention provides a method for preparing a dual-function catalyst for deoxygenation and dehydrogenation at room temperature, the preparation method comprising the following steps:

[0009] The support material is immersed in a cerium source solution, the solvent is evaporated off by rotary evaporation under negative pressure, and then dried and calcined to obtain a support material modified with a CeO2 oxygen regulating layer;

[0010] The CeO2 oxygen regulating layer-modified support material is immersed in a solution containing a platinum source, a palladium source, and a nickel source, and the solvent is evaporated by rotary evaporation under negative pressure, followed by drying and reduction reaction under a hydrogen atmosphere to obtain PtPdNi / CeO2 / support;

[0011] The PtPdNi / CeO2 / support is immersed in a hydrophobic agent solution, allowed to stand at room temperature for more than 1 hour, filtered, and dried to obtain the room-temperature deoxygenation and dehydrogenation bifunctional catalyst.

[0012] Furthermore, the weight ratio of the carrier material to the cerium source is (10-100):(0.1-10); the carrier material includes at least one of a molecular sieve carrier, an alumina carrier, a mesoporous material carrier and a porous ceramic spherical carrier; the cerium source includes at least one of cerium nitrate, cerium chloride, ammonium cerium nitrate, cerium iodide, cerium bromide, cerium oxalate, cerium sulfate, cerium acetate, cerium carbonate, cerium isopropionate, and cerium acetylacetonate.

[0013] Furthermore, the calcination working condition parameters include: temperature of 350 to 1000° C. and time of 0.1 to 12 hours.

[0014] Furthermore, the weight ratio of the CeO2 oxygen regulating layer modified support material, the platinum source, the palladium source and the nickel source is (10-100):(0.01-1):(0.01-1):(0.01-1); the platinum source includes platinum chloride, chloroplatinic acid, sodium chloroplatinate, potassium chloroplatinate, platinum nitrate, acetylacetonate platinum, and dinitrosodiammineplatinum; the palladium source includes palladium chloride, palladium nitrate, palladium acetate, palladium sulfate, and acetylacetonate palladium; and the nickel source includes nickel chloride, nickel nitrate, nickel acetate, nickel sulfate, and nickel acetylacetonate.

[0015] Furthermore, the working condition parameters of the reduction reaction under the hydrogen atmosphere include: temperature of 150 to 800° C. and time of 0.1 to 12 hours.

[0016] Furthermore, the weight ratio of the PtPdNi / CeO2 / carrier and the hydrophobic agent is (10-100): (0.001-1); the hydrophobic agent includes alkyl silanes and fluorosilanes, the alkyl silanes include octadecyltrimethoxysilane, hexadecyltriethoxysilane, dodecyltrimethoxysilane, n-octyltriethoxysilane, methyltrimethoxysilane, methyltriethoxysilane, octadecyldimethylmethoxysilane, methoxytrimethylsilane, methoxytriphenylsilane, the fluorosilanes include triethoxy-1H,1H,2H,2H-tridecafluoro-n-octylsilane, 1 H,1H,2H,2H-Perfluorodecyltriethoxysilane, trimethoxy(1H,1H,2H,2H-tridecafluorooctyl)silane, trimethoxy(1H,1H,2H,2H-nonafluorohexyl)silane, trimethoxy(1H,1H,2H,2H-heptadecafluorodecyl)silane, triethoxy(1H,1H,2H,2H-nonafluorohexyl)silane, 1H,1H,2H,2H-perfluorooctyldimethylchlorosilane, 3,3,3-trifluoropropyltriethoxysilane, 1H,1H,2H,2H-perfluorododecyltrichlorosilane, 1H,1H,2H,2H-perfluorodecyltrichlorosilane.

[0017] In the second aspect, based on the same inventive concept, the present invention provides a bifunctional catalyst for deoxygenation and dehydrogenation at room temperature, which is prepared by the preparation method of the bifunctional catalyst for deoxygenation and dehydrogenation at room temperature described in any one of the first aspects.

[0018] In the third aspect, based on the same inventive concept, the present invention provides an application of a room temperature deoxygenation and dehydrogenation bifunctional catalyst prepared by the preparation method of the room temperature deoxygenation and dehydrogenation bifunctional catalyst described in any one of the second aspects in deoxygenation and dehydrogenation.

[0019] The above technical solution provided by the embodiment of the present invention has at least the following advantages compared with the prior art:

[0020] The embodiments of the present invention provide a room-temperature dual-function catalyst for oxygen and hydrogen removal, its preparation method, and application. The present invention provides a dual-function catalyst for oxygen and hydrogen removal that can operate at room temperature, comprising a hydrophobic layer, a PtPdNi catalytic layer, a CeO2 oxygen regulating layer, and a filler carrier main structure. This catalyst can significantly reduce energy consumption, reduce costs, and improve catalytic efficiency, thereby overcoming the shortcomings of the prior art. Specifically:

[0021] 1. Adding an oxygen regulating layer accelerates the reaction rate of the rate-determining oxygen reduction process, thereby achieving a more efficient hydrogen-oxygen catalytic reaction.

[0022] 2. The catalyst components are optimized, and the palladium-platinum dual high-activity catalytic site design can flexibly respond to various impurity content (CO, NO, NO2, CO2, CH4, SO2, etc.) working conditions, reducing the risk of catalyst poisoning. The addition of nickel components can effectively reduce the amount of precious metals used and improve the utilization rate of precious metals.

[0023] 3. Hydrophobic layer modification prevents water generated by catalytic oxidation from covering the active sites of the catalyst, ensuring the performance and stability of the catalyst. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0026] Figure 1 This is a comparison of the catalytic performance of various catalysts at room temperature before modification of the hydrophobic layer in the present invention.

[0027] Figure 2 This is a comparison of the catalytic performance of the PtPdNi / CeO2 / Al2O3 catalyst at room temperature before and after hydrophobic modification with methylsilane in the present invention.

[0028] Figure 3 This is a comparison of the catalytic performance of the methylsilane hydrophobically modified PtPdNi / CeO2 / Al2O3 catalyst and the Pt / Al2O3 catalyst in different impurity gases at room temperature in the present invention. DETAILED DESCRIPTION

[0029] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 making creative efforts shall fall within the scope of protection of the present invention.

[0030] Unless otherwise specified, various raw materials, reagents, instruments and equipment used in the present invention can be purchased from the market or prepared by existing methods.

[0031] The present invention will be further described below in conjunction with specific examples. It should be understood that these examples are intended to illustrate the present invention only and are not intended to limit the scope of the invention. The experimental methods in the following examples where specific conditions are not specified are generally measured in accordance with national standards. If there are no corresponding national standards, then the methods are carried out in accordance with general international standards, conventional conditions, or the conditions recommended by the manufacturer.

[0032] Example 1

[0033] This example provides a room temperature deoxygenation and dehydrogenation dual-function catalyst, and the preparation method of the room temperature deoxygenation and dehydrogenation dual-function catalyst comprises the following steps:

[0034] Step (1): Immersing the carrier material in a cerium source solution, rotary evaporating the solvent under negative pressure, drying (drying in an oven at 120°C for 2 hours) and calcining to obtain a CeO2 oxygen adjustment layer-modified carrier material; wherein the weight ratio of the carrier material to the cerium source is 100:1, the carrier material is specifically Al2O3, the cerium source is specifically cerium nitrate, the mass concentration of the cerium source solution is 5wt%, and the calcination working condition parameters include: temperature of 600°C and time of 2 hours.

[0035] Step (2): immersing the CeO2 oxygen regulating layer modified carrier material in a solution containing a platinum source, a palladium source, and a nickel source, and then drying (drying in an oven at 120°C for 2 hours) and reducing the material under a hydrogen atmosphere to obtain PtPdNi / CeO2 / carrier; wherein the weight ratio of the CeO2 oxygen regulating layer modified carrier material, the platinum source, the palladium source, and the nickel source is 1000:2:1:1, the platinum source is platinum chloride, the palladium source is palladium chloride, and the nickel source is nickel chloride; and the working condition parameters of the reduction reaction under the hydrogen atmosphere include: temperature of 500°C, time of 2 hours, and hydrogen flow rate of 500 mL / min;

[0036] Step (3): Immerse the PtPdNi / CeO2 / support in a hydrophobic agent solution, let it stand at room temperature for more than 1 hour, filter, and dry in an oven at 120°C for 2 hours to obtain the room temperature deoxygenation and dehydrogenation bifunctional catalyst; wherein the weight ratio of the PtPdNi / CeO2 / support and the hydrophobic agent is 10000:1; the hydrophobic agent is an alkyl silane, the alkyl silane is methyltrimethoxysilane, and the mass concentration of the hydrophobic agent solution is 1wt%.

[0037] The catalyst obtained in this example is recorded as PtPdNi / CeO2 / Al2O3-methylsilane.

[0038] Comparative Example 1

[0039] This example provides a Pt / Al2O3 catalyst, and the preparation method of the Pt / Al2O3 catalyst comprises the following steps:

[0040] An Al2O3 carrier material is immersed in a solution containing a platinum source, and the solvent is evaporated by rotary evaporation under negative pressure, followed by drying (dried in an oven at 120°C for 2 hours) and reduction reaction under a hydrogen atmosphere to obtain Pt / Al2O3; wherein the weight ratio of the Al2O3 carrier material to the platinum source is 1000:3, the platinum source is platinum chloride, and the working condition parameters of the reduction reaction under the hydrogen atmosphere include: temperature of 500°C, time of 2 hours, and hydrogen flow rate of 500 mL / min.

[0041] Comparative Example 2

[0042] This example provides a Pd / Al2O3 catalyst, and the preparation method of the Pd / Al2O3 catalyst comprises the following steps:

[0043] An Al2O3 carrier material is immersed in a solution containing a palladium source, and the solvent is evaporated by rotary evaporation under negative pressure, followed by drying (dried in an oven at 120°C for 2 hours) and reduction reaction under a hydrogen atmosphere to obtain Pd / Al2O3; wherein the weight ratio of the Al2O3 carrier material to the palladium source is 1000:3, the palladium source is platinum chloride, and the working conditions parameters of the reduction reaction under the hydrogen atmosphere include: temperature of 500°C, time of 2 hours, and hydrogen flow rate of 500 mL / min.

[0044] Comparative Example 3

[0045] This example provides a PtPdNi / Al2O3 catalyst, and the preparation method of the PtPdNi / Al2O3 catalyst comprises the following steps:

[0046] The Al2O3 carrier material is immersed in a solution containing a platinum source, a palladium source, and a nickel source, and the solvent is evaporated by rotary evaporation under negative pressure, followed by drying (dried in an oven at 120°C for 2 hours) and reduction reaction under a hydrogen atmosphere to obtain PtPdNi / Al2O3; wherein the weight ratio of the Al2O3 carrier material, the platinum source, the palladium source, and the nickel source is 1000:2:1:1, the platinum source is platinum chloride, the palladium source is palladium chloride, and the nickel source is nickel chloride. The working condition parameters of the reduction reaction under the hydrogen atmosphere include: temperature of 500°C, time of 2 hours, and hydrogen flow rate of 500 mL / min.

[0047] Comparative Example 4

[0048] This example provides a Pt / CeO2 / Al2O3 catalyst, and the preparation method of the Pt / CeO2 / Al2O3 catalyst comprises the following steps:

[0049] The carrier material is immersed in a cerium source solution, and the solvent is evaporated by negative pressure rotary evaporation, followed by drying (dried in an oven at 120°C for 2 hours) and calcination to obtain a carrier material modified with a CeO2 oxygen adjustment layer; wherein the weight ratio of the carrier material to the cerium source is 100:1, the carrier material is specifically Al2O3, the cerium source is specifically cerium nitrate, the mass concentration of the cerium source solution is 5wt%, and the working conditions parameters of the calcination include: temperature of 600°C and time of 2 hours.

[0050] The CeO2 oxygen adjustment layer-modified carrier material is immersed in a solution containing a platinum source, and the solvent is evaporated by vacuum rotary evaporation, followed by drying (dried in an oven at 120°C for 2 hours) and reduction reaction under a hydrogen atmosphere to obtain Pt / CeO2 / carrier; wherein the weight ratio of the CeO2 oxygen adjustment layer-modified carrier material and the platinum source is 1000:3, the platinum source is platinum chloride, and the working condition parameters of the reduction reaction under the hydrogen atmosphere include: temperature of 500°C, time of 2 hours, and hydrogen flow rate of 500mL / min.

[0051] Comparative Example 5

[0052] This example provides a Pd / CeO2 / Al2O3 catalyst, and the preparation method of the Pd / CeO2 / Al2O3 catalyst comprises the following steps:

[0053] The carrier material is immersed in a cerium source solution, and the solvent is evaporated by negative pressure rotary evaporation, followed by drying (dried in an oven at 120°C for 2 hours) and calcination to obtain a carrier material modified with a CeO2 oxygen adjustment layer; wherein the weight ratio of the carrier material to the cerium source is 100:1, the carrier material is specifically Al2O3, the cerium source is specifically cerium nitrate, the mass concentration of the cerium source solution is 5wt%, and the working conditions parameters of the calcination include: temperature of 600°C and time of 2 hours.

[0054] The CeO2 oxygen adjustment layer-modified carrier material is immersed in a solution containing a palladium source, and the solvent is evaporated by negative pressure rotary evaporation, followed by drying (dried in an oven at 120°C for 2 hours) and reduction reaction under a hydrogen atmosphere to obtain Pd / CeO2 / carrier; wherein the weight ratio of the CeO2 oxygen adjustment layer-modified carrier material and the palladium source is 1000:3, the palladium source is palladium chloride, and the working condition parameters of the reduction reaction under the hydrogen atmosphere include: temperature of 500°C, time of 2 hours, and hydrogen flow rate of 500mL / min.

[0055] Comparative Example 6

[0056] This example provides a PtPdNi / CeO2 / Al2O3 catalyst, and the preparation method of the PtPdNi / CeO2 / Al2O3 catalyst comprises the following steps:

[0057] The carrier material is immersed in a cerium source solution, and the solvent is evaporated by negative pressure rotary evaporation, followed by drying (dried in an oven at 120°C for 2 hours) and calcination to obtain a carrier material modified with a CeO2 oxygen adjustment layer; wherein the weight ratio of the carrier material to the cerium source is 100:1, the carrier material is specifically Al2O3, the cerium source is specifically cerium nitrate, the mass concentration of the cerium source solution is 5wt%, and the working conditions parameters of the calcination include: temperature of 600°C and time of 2 hours.

[0058] The CeO2 oxygen adjustment layer modified carrier material is immersed in a solution containing a platinum source, a palladium source, and a nickel source, and the solvent is evaporated by vacuum rotary evaporation, followed by drying (dried in an oven at 120°C for 2 hours) and reduction reaction under a hydrogen atmosphere to obtain PtPdNi / CeO2 / carrier; wherein the weight ratio of the CeO2 oxygen adjustment layer modified carrier material, the platinum source, the palladium source and the nickel source is 1000:2:1:1, the platinum source is platinum chloride, the palladium source is palladium chloride, and the nickel source is nickel chloride, and the working condition parameters of the reduction reaction under the hydrogen atmosphere include: temperature of 500°C, time of 2 hours, and hydrogen flow rate of 500mL / min.

[0059] Comparative Example 7

[0060] This example provides a Pt / Al2O3-methylsilane catalyst, and the preparation method of the Pt / Al2O3-methylsilane catalyst comprises the following steps:

[0061] An Al2O3 carrier material is immersed in a solution containing a platinum source, and the solvent is evaporated by rotary evaporation under negative pressure, followed by drying (dried in an oven at 120°C for 2 hours) and reduction reaction under a hydrogen atmosphere to obtain Pt / Al2O3; wherein the weight ratio of the Al2O3 carrier material to the platinum source is 1000:3, the platinum source is platinum chloride, and the working condition parameters of the reduction reaction under the hydrogen atmosphere include: temperature of 500°C, time of 2 hours, and hydrogen flow rate of 500 mL / min.

[0062] The Pt / Al2O3 was immersed in a hydrophobic agent solution, allowed to stand at room temperature for more than 1 hour, filtered, and dried in an oven at 120°C for 2 hours; wherein the weight ratio of the Pt / Al2O3 to the hydrophobic agent was 10000:1; the hydrophobic agent was an alkyl silane, the alkyl silane was methyltrimethoxysilane, and the mass concentration of the hydrophobic agent solution was 1wt%.

[0063] Test Example 1

[0064] This example tests the catalytic performance of the catalysts provided in Comparative Examples 1 to 6: Pt / Al2O3 catalyst, Pd / Al2O3 catalyst, PtPdNi / Al2O3 catalyst, Pt / CeO2 / Al2O3 catalyst, Pd / CeO2 / Al2O3 catalyst and PtPdNi / CeO2 / Al2O3 catalyst at room temperature.

[0065] Test method: 50 mg of catalyst was loaded into a fixed-bed reaction column. Hydrogen-containing air was introduced at room temperature with a hydrogen concentration of 3000 ppm and a space velocity of 30,000 mL / (g·h). The hydrogen concentration in the gas flowing out of the reaction bed was measured by gas chromatography.

[0066] The test results are as follows Figure 1 As shown by Figure 1 It can be seen that at room temperature, the catalytic efficiency of Pd / Al2O3 supported on a pure Al2O3 carrier is better than that of Pt / Al2O3, but lower than that of PtPdNi / Al2O3. After adding a CeO2 oxygen regulating layer, the catalytic efficiency of all three catalysts is greatly improved, but generally follows the same order: PtPdNi / CeO2 / Al2O3>Pd / CeO2 / Al2O3>Pt / CeO2 / Al2O3.

[0067] Furthermore, in this example, the catalytic performance of the catalyst obtained in Example 1 - PtPdNi / CeO2 / Al2O3-methylsilane and the PtPdNi / CeO2 / Al2O3 catalyst provided in Comparative Example 6 at room temperature was compared.

[0068] Test method: 50 mg of catalyst was loaded into a fixed-bed reaction column. Hydrogen-containing air was introduced at room temperature with a hydrogen concentration of 3000 ppm and a space velocity of 30,000 mL / (g·h). The hydrogen concentration in the gas flowing out of the reaction bed was measured by gas chromatography.

[0069] The test results are as follows Figure 2 As shown by Figure 2 It can be seen that before hydrophobic modification, the catalytic performance of the PtPdNi / CeO2 / Al2O3 catalyst decreased by about 5% within 200 hours, indicating that the water produced by catalytic oxidation has a certain effect on the stability of the catalyst. However, after hydrophobic modification with methylsilane, the catalytic performance remained almost unchanged within 200 hours, showing excellent stability.

[0070] Test Example 2

[0071] In this example, the catalytic performance of the catalysts obtained from Example 1 (PtPdNi / CeO2 / Al2O3-methylsilane) and Comparative Example 7 (Pt / Al2O3-methylsilane) in different impurity gases at room temperature was compared.

[0072] Test method: 50 mg of catalyst was loaded into a fixed-bed reaction column. Hydrogen-containing air was introduced at room temperature with a hydrogen concentration of 3000 ppm and 100 ppm of impurity gas was added. The air velocity was 30,000 mL / (g·h). The hydrogen concentration in the gas flowing out of the reaction bed was measured by gas chromatography.

[0073] The test results are as follows Figure 3 As shown ( Figure 3 The catalytic performance test results of PtPdNi / CeO2 / Al2O3-methylsilane catalyst in CO and SO2 impurity gases overlap). Figure 3 The results show that the PtPdNi / CeO2 / Al2O3 catalyst hydrophobically modified with methylsilane exhibited stable catalytic efficiency in 100 ppm CO and 100 ppm SO2 impurity gases, with no degradation after 20 hours. However, the Pt / Al2O3 catalyst hydrophobically modified with methylsilane had difficulty maintaining high catalytic efficiency in 100 ppm CO and 100 ppm SO2 impurity gases, and experienced severe degradation.

[0074] The foregoing description is intended only to provide specific embodiments of the present invention, which will enable those skilled in the art to understand and implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not intended to be limited to the embodiments shown herein, but is intended to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for preparing a dual-function catalyst for deoxygenation and dehydrogenation at room temperature, characterized in that: The preparation method comprises the following steps: The support material is immersed in a cerium source solution, the solvent is evaporated off by rotary evaporation under negative pressure, and then dried and calcined to obtain a support material modified with a CeO2 oxygen regulating layer; The CeO2 oxygen regulating layer-modified support material is immersed in a solution containing a platinum source, a palladium source, and a nickel source, and the solvent is evaporated by rotary evaporation under negative pressure, followed by drying and reduction reaction under a hydrogen atmosphere to obtain PtPdNi / CeO2 / support; The PtPdNi / CeO2 / support is immersed in a hydrophobic agent solution, allowed to stand at room temperature for more than 1 hour, filtered, and dried to obtain the room-temperature deoxygenation and dehydrogenation bifunctional catalyst.

2. The preparation method of the room temperature deoxygenation and dehydrogenation bifunctional catalyst according to claim 1, characterized in that: The weight ratio of the carrier material to the cerium source is (10-100):(0.1-10); the carrier material includes at least one of a molecular sieve carrier, an alumina carrier, a mesoporous material carrier and a porous ceramic spherical carrier; the cerium source includes at least one of cerium nitrate, cerium chloride, ammonium cerium nitrate, cerium iodide, cerium bromide, cerium oxalate, cerium sulfate, cerium acetate, cerium carbonate, cerium isopropionate and cerium acetylacetonate.

3. The preparation method of the room temperature deoxygenation and dehydrogenation bifunctional catalyst according to claim 1, characterized in that: The calcination working condition parameters include: temperature of 350 to 1000° C. and time of 0.1 to 12 hours.

4. The preparation method of the room temperature deoxygenation and dehydrogenation bifunctional catalyst according to claim 1, characterized in that: The weight ratio of the CeO2 oxygen regulating layer modified carrier material, the platinum source, the palladium source and the nickel source is (10-100):(0.01-1):(0.01-1):(0.01-1); the platinum source includes platinum chloride, chloroplatinic acid, sodium chloroplatinate, potassium chloroplatinate, platinum nitrate, acetylacetonate platinum, and dinitrosodiammine platinum; the palladium source includes palladium chloride, palladium nitrate, palladium acetate, palladium sulfate, and acetylacetonate palladium; and the nickel source includes nickel chloride, nickel nitrate, nickel acetate, nickel sulfate, and nickel acetylacetonate.

5. The preparation method of the room temperature deoxygenation and dehydrogenation dual-function catalyst according to claim 1, characterized in that: The working condition parameters of the reduction reaction under the hydrogen atmosphere include: temperature of 150 to 800° C. and time of 0.1 to 12 hours.

6. The method for preparing a dual-function catalyst for deoxygenation and dehydrogenation at room temperature according to claim 1, wherein: The weight ratio of the PtPdNi / CeO2 / carrier and the hydrophobic agent is (10-100): (0.001-1); the hydrophobic agent includes alkylsilanes and fluorosilanes, the alkylsilanes include octadecyltrimethoxysilane, hexadecyltriethoxysilane, dodecyltrimethoxysilane, n-octyltriethoxysilane, methyltrimethoxysilane, methyltriethoxysilane, octadecyldimethylmethoxysilane, methoxytrimethylsilane, methoxytriphenylsilane, the fluorosilanes include triethoxy-1H,1H,2H,2H-tridecafluoro-n-octylsilane, 1H,1 H,2H,2H-Perfluorodecyltriethoxysilane, trimethoxy(1H,1H,2H,2H-tridecafluorooctyl)silane, trimethoxy(1H,1H,2H,2H-nonafluorohexyl)silane, trimethoxy(1H,1H,2H,2H-heptadecafluorodecyl)silane, triethoxy(1H,1H,2H,2H-nonafluorohexyl)silane, 1H,1H,2H,2H-perfluorooctyldimethylchlorosilane, 3,3,3-trifluoropropyltriethoxysilane, 1H,1H,2H,2H-perfluorododecyltrichlorosilane, 1H,1H,2H,2H-perfluorodecyltrichlorosilane.

7. A room temperature deoxygenation and dehydrogenation dual-function catalyst, characterized in that: The room temperature deoxygenation and dehydrogenation bifunctional catalyst is prepared by the preparation method according to any one of claims 1 to 6.

8. Use of the room temperature deoxygenation and dehydrogenation bifunctional catalyst according to claim 7 in deoxygenation and dehydrogenation.

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