Normal-temperature deoxygenation and dehydrogenation bifunctional catalyst, preparation method and application thereof

Abstract

The application discloses a normal-temperature oxygen-removing and hydrogen-removing bifunctional catalyst and a preparation method and application thereof, relates to the technical field of catalysts, and comprises the following steps: dipping a carrier material into a cerium source solution, drying and calcining after negative pressure rotary evaporation of the solvent to obtain a CeO2 oxygen regulation layer modified carrier material; dipping the CeO2 oxygen regulation layer modified carrier material into a solution containing a platinum source, a palladium source and a nickel source, drying and reducing under a hydrogen atmosphere after negative pressure rotary evaporation of the solvent to obtain PtPdNi / CeO2 / carrier; and dipping the PtPdNi / CeO2 / carrier into a hydrophobic agent solution to obtain the normal-temperature oxygen-removing and hydrogen-removing bifunctional catalyst. The application provides a normal-temperature oxygen-removing and hydrogen-removing bifunctional catalyst which can run at normal temperature, can significantly reduce energy consumption, reduce cost, improve catalytic efficiency and has excellent anti-pollutant gas poisoning performance.

Description

Technical Field

[0001] This invention relates to the field of catalyst technology, and in particular to a bifunctional catalyst for deoxygenation and dehydrogenation at room temperature, its preparation method, and its application. Background Technology

[0002] In modern industrial production and energy conversion, deoxygenation and dehydrogenation technologies are crucial for ensuring production safety, improving product quality, and achieving efficient energy utilization. Currently, the deoxygenation and dehydrogenation catalysts commonly used in the industry primarily employ spherical packing materials such as molecular sieves and alumina as support materials. The preparation process typically involves immersing the support material in a platinum (Pt) or palladium (Pd) compound solution, ensuring the active component is uniformly loaded onto the support surface. Following drying, the metal compound is then converted into a catalytically active elemental metal or a low-valence compound through chemical reduction or atmospheric reduction, thus obtaining the final catalyst product.

[0003] The aforementioned preparation process has matured through long-term development and practice, and is easily applicable to large-scale industrial production, thus dominating industrial applications. However, this type of catalyst faces numerous unresolved issues in practical applications.

[0004] First, the catalyst is extremely sensitive to water generated during catalytic oxidation. Water molecules readily adsorb onto the catalyst surface, occupying active sites and hindering the contact between reactant molecules and active centers, thus significantly reducing the catalyst's catalytic efficiency. To maintain high catalytic activity, these catalysts typically need to operate at temperatures above 100°C. This high-temperature requirement not only increases energy consumption and production costs but also necessitates dedicated cooling processes in subsequent steps to remove moisture from the reaction system, further increasing the system's complexity and cost.

[0005] Secondly, the existing technological understanding lacks a comprehensive and in-depth grasp of the overall process of deoxygenation and dehydrogenation catalytic oxidation reactions. In particular, the crucial role of the oxygen reduction process in the entire catalytic oxidation process—the rate-determining step—is not fully recognized. The failure to specifically optimize and improve the oxygen reduction process severely limits the rate of the entire catalytic oxidation reaction, resulting in low catalytic efficiency. To compensate for this deficiency, it is necessary to increase the amount of precious metal catalysts used to improve the reaction rate, but this further increases the cost of the catalyst and also puts greater pressure on the environment.

[0006] Therefore, developing a bifunctional catalyst for deoxygenation and dehydrogenation that can operate efficiently at room temperature, and exploring its preparation methods and application processes, is 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] To address the above problems, this invention provides a bifunctional catalyst for deoxygenation and dehydrogenation at room temperature, its preparation method, and its application.

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

[0009] The carrier material was immersed in a cerium source solution, the solvent was evaporated under negative pressure, and then dried and calcined to obtain a carrier material modified with a CeO2 oxygen regulation layer.

[0010] The support material modified with the CeO2 oxygen regulation layer was immersed in a solution containing platinum, palladium and nickel sources. After the solvent was evaporated by rotary evaporation under negative pressure, it was dried and reduced under a hydrogen atmosphere to obtain PtPdNi / CeO2 / support.

[0011] The PtPdNi / CeO2 / support was impregnated 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] Further, 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 molecular sieve carrier, alumina carrier, mesoporous material carrier and porous ceramic spherical carrier; the cerium source includes at least one of cerium nitrate, cerium chloride, cerium ammonium nitrate, cerium iodide, cerium bromide, cerium oxalate, cerium sulfate, cerium acetate, cerium carbonate, cerium isopropionate and cerium acetylacetonate.

[0013] Furthermore, the working conditions for calcination include: a temperature of 350–1000°C and a time of 0.1–12 hours.

[0014] Further, the weight ratio of the CeO2 oxygen regulation 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, platinum acetylacetonate, and dinitrosodiamineplatinum; the palladium source includes palladium chloride, palladium nitrate, palladium acetate, palladium sulfate, and palladium acetylacetonate; and the nickel source includes nickel chloride, nickel nitrate, nickel acetate, nickel sulfate, and nickel acetylacetonate.

[0015] Furthermore, the operating conditions for the reduction reaction under a hydrogen atmosphere include: a temperature of 150–800°C and a time of 0.1–12 hours.

[0016] Further, the weight ratio of the PtPdNi / CeO2 / support to 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, and methoxytriphenylsilane, and the fluorosilanes include triethoxy-1H,1H,2H,2H-tridecylfluoron-octylsilane, 1 H,1H,2H,2H-perfluorodecyltriethoxysilane, trimethoxy(1H,1H,2H,2H-tridecylfluorooctyl)silane, trimethoxy(1H,1H,2H,2H-nonafluorohexyl)silane, trimethoxy(1H,1H,2H,2H-heptafluorodecyl)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] Secondly, based on the same inventive concept, the present invention provides a room-temperature deoxygenation and dehydrogenation bifunctional catalyst, which is prepared by the preparation method of the room-temperature deoxygenation and dehydrogenation bifunctional catalyst described in any one of the first aspects.

[0018] Thirdly, based on the same inventive concept, the present invention provides the application of the room-temperature deoxygenation and dehydrogenation bifunctional catalyst prepared by the preparation method of any one of the second aspects in the deoxygenation and dehydrogenation process.

[0019] The technical solutions provided in the embodiments of the present invention have at least the following advantages compared with the prior art:

[0020] This invention provides a room-temperature oxygen and hydrogen removal bifunctional catalyst, its preparation method, and its application. This invention provides a bifunctional catalyst capable of operating at room temperature, comprising a hydrophobic layer, a PtPdNi catalyst layer, a CeO2 oxygen regulating layer, and a packing support structure. It significantly reduces energy consumption, lowers costs, and improves catalytic efficiency, overcoming the shortcomings of existing technologies. Specifically:

[0021] 1. Adding an oxygen regulation 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 composition is optimized, and the design of the palladium-platinum dual high-activity catalytic sites can flexibly cope with various impurity contents (CO, NO, NO2, CO2, CH4, SO2, etc.) to reduce the risk of catalyst poisoning. The addition of nickel 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 during catalytic oxidation from covering the active sites of the catalyst, ensuring catalyst performance and stability. Attached Figure Description

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

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a comparison of the catalytic performance of each catalyst at room temperature before hydrophobic layer modification in this invention.

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

[0028] Figure 3 This figure shows 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 this invention. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

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

[0031] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Experimental methods in the following embodiments that do not specify specific conditions are generally determined according to national standards. If no corresponding national standard exists, then generally accepted international standards, conventional conditions, or conditions recommended by the manufacturer are followed.

[0032] Example 1

[0033] This example provides a room-temperature deoxygenation and dehydrogenation bifunctional catalyst, the preparation method of which includes the following steps:

[0034] Step (1): The carrier material is immersed in a cerium source solution, the solvent is evaporated under negative pressure, and then dried (dried in an oven at 120°C for 2 hours) and calcined to obtain a carrier material modified with a CeO2 oxygen regulation 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 for calcination include: temperature of 600°C and time of 2 hours.

[0035] Step (2): The CeO2 oxygen regulation layer modified support material is immersed in a solution containing platinum source, palladium source and nickel source. After the solvent is evaporated by rotary evaporation under negative pressure, it is dried (dried in an oven at 120°C for 2 hours) and reduced under a hydrogen atmosphere to obtain PtPdNi / CeO2 / support; wherein, the weight ratio of the CeO2 oxygen regulation layer modified support 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, the nickel source is nickel chloride, and the working conditions of the reduction reaction under a hydrogen atmosphere include: temperature of 500°C, time of 2 hours and hydrogen flow rate of 500 mL / min;

[0036] Step (3): The PtPdNi / CeO2 / support is immersed in a hydrophobic agent solution, left to stand at room temperature for more than 1 hour, filtered, and dried 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 to the hydrophobic agent is 10000:1; the hydrophobic agent is an alkylsilane, the alkylsilane is methyltrimethoxysilane, and the mass concentration of the hydrophobic agent solution is 1wt%.

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

[0038] Comparative Example 1

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

[0040] An Al2O3 support material was immersed in a solution containing a platinum source. After the solvent was evaporated by rotary evaporation under negative pressure, the material was dried (drying at 120°C in an oven for 2 hours) and then reduced under a hydrogen atmosphere to obtain Pt / Al2O3. The weight ratio of the Al2O3 support material to the platinum source was 1000:3, and the platinum source was platinum chloride. The working conditions for the reduction reaction under a hydrogen atmosphere included: a temperature of 500°C, a time of 2 hours, and a hydrogen flow rate of 500 mL / min.

[0041] Comparative Example 2

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

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

[0044] Comparative Example 3

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

[0046] The Al2O3 support material was immersed in a solution containing a platinum source, a palladium source, and a nickel source. After the solvent was evaporated by rotary evaporation under negative pressure, it was dried (drying at 120°C in an oven for 2 hours) and then reduced under a hydrogen atmosphere to obtain PtPdNi / Al2O3. The weight ratio of the Al2O3 support material, the platinum source, the palladium source, and the nickel source was 1000:2:1:1. The platinum source was platinum chloride, the palladium source was palladium chloride, and the nickel source was nickel chloride. The working conditions for the reduction reaction under a hydrogen atmosphere included: a temperature of 500°C, a time of 2 hours, and a hydrogen flow rate of 500 mL / min.

[0047] Comparative Example 4

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

[0049] The carrier material is immersed in a cerium source solution, the solvent is evaporated under negative pressure, and then dried (drying at 120°C for 2 hours in an oven) and calcined to obtain a carrier material modified with a CeO2 oxygen regulation 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 calcination working conditions include: temperature of 600°C and time of 2 hours.

[0050] The CeO2 oxygen regulation layer modified support material was immersed in a solution containing a platinum source, and the solvent was evaporated under negative pressure. After drying (drying at 120°C in an oven for 2 hours) and reduction reaction under a hydrogen atmosphere, Pt / CeO2 / support was obtained. The weight ratio of the CeO2 oxygen regulation layer modified support material to the platinum source was 1000:3, and the platinum source was platinum chloride. The working conditions of the reduction reaction under a hydrogen atmosphere included: temperature of 500°C, time of 2 hours, and hydrogen flow rate of 500 mL / min.

[0051] Comparative Example 5

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

[0053] The carrier material is immersed in a cerium source solution, the solvent is evaporated under negative pressure, and then dried (drying at 120°C for 2 hours in an oven) and calcined to obtain a carrier material modified with a CeO2 oxygen regulation 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 calcination working conditions include: temperature of 600°C and time of 2 hours.

[0054] The CeO2 oxygen regulation layer modified support material was immersed in a solution containing a palladium source, and the solvent was evaporated under negative pressure. After drying (drying at 120°C in an oven for 2 hours) and reduction reaction under a hydrogen atmosphere, Pd / CeO2 / support was obtained. The weight ratio of the CeO2 oxygen regulation layer modified support material to the palladium source was 1000:3, and the palladium source was palladium chloride. The working conditions of the reduction reaction under a hydrogen atmosphere included: temperature of 500°C, time of 2 hours, and hydrogen flow rate of 500 mL / min.

[0055] Comparative Example 6

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

[0057] The carrier material is immersed in a cerium source solution, the solvent is evaporated under negative pressure, and then dried (drying at 120°C for 2 hours in an oven) and calcined to obtain a carrier material modified with a CeO2 oxygen regulation 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 calcination working conditions include: temperature of 600°C and time of 2 hours.

[0058] The CeO2 oxygen regulation layer modified support material was immersed in a solution containing a platinum source, a palladium source, and a nickel source. After the solvent was evaporated by rotary evaporation under negative pressure, it was dried (drying at 120°C in an oven for 2 hours) and then reduced under a hydrogen atmosphere to obtain PtPdNi / CeO2 / support. The weight ratio of the CeO2 oxygen regulation layer modified support material, the platinum source, the palladium source, and the nickel source was 1000:2:1:1. The platinum source was platinum chloride, the palladium source was palladium chloride, and the nickel source was nickel chloride. The working conditions for the reduction reaction under a hydrogen atmosphere included: temperature of 500°C, time of 2 hours, and hydrogen flow rate of 500 mL / min.

[0059] Comparative Example 7

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

[0061] An Al2O3 support material was immersed in a solution containing a platinum source. After the solvent was evaporated by rotary evaporation under negative pressure, the material was dried (drying at 120°C in an oven for 2 hours) and then reduced under a hydrogen atmosphere to obtain Pt / Al2O3. The weight ratio of the Al2O3 support material to the platinum source was 1000:3, and the platinum source was platinum chloride. The working conditions for the reduction reaction under a hydrogen atmosphere included: a temperature of 500°C, a time of 2 hours, and a 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 alkylsilane, the alkylsilane was methyltrimethoxysilane, and the mass concentration of the hydrophobic agent solution was 1 wt%.

[0063] Test Example 1

[0064] This example tests the catalytic performance at room temperature 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.

[0065] Test method: 50 mg of catalyst was packed into a fixed-bed reaction column, and air containing hydrogen was introduced at room temperature with a hydrogen concentration of 3000 ppm and a space velocity of 30000 mL / (g·h). The hydrogen concentration in the gas flowing out of the reaction bed was tested by gas chromatography.

[0066] 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 support is better than that of Pt / Al2O3, but both are lower than that of PtPdNi / Al2O3 catalysts. After adding a CeO2 oxygen conditioning layer, the catalytic efficiency of all three catalysts is significantly improved, but in general, they still follow the same order: PtPdNi / CeO2 / Al2O3 > Pd / CeO2 / Al2O3 > Pt / CeO2 / Al2O3.

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

[0068] Test method: 50 mg of catalyst was packed into a fixed-bed reaction column, and air containing hydrogen was introduced at room temperature with a hydrogen concentration of 3000 ppm and a space velocity of 30000 mL / (g·h). The hydrogen concentration in the gas flowing out of the reaction bed was tested by gas chromatography.

[0069] Test results are as follows Figure 2 As shown, by Figure 2 It can be seen that before hydrophobic modification, the catalytic performance of PtPdNi / CeO2 / Al2O3 catalyst decreased by about 5% within 200 hours, indicating that the water generated by catalytic oxidation has a certain impact 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] This example compares the catalytic performance of the catalysts obtained in Example 1 (PtPdNi / CeO2 / Al2O3-methylsilane) and Comparative Example 7 (Pt / Al2O3-methylsilane) under different impurity gases at room temperature.

[0072] Test method: 50 mg of catalyst was packed into a fixed bed reaction column, and air containing hydrogen was introduced at room temperature with a hydrogen concentration of 3000 ppm. 100 ppm of impurity gas was added separately. The space velocity was 30000 mL / (g·h). The hydrogen concentration in the gas flowing out of the reaction bed was tested by gas chromatography.

[0073] Test results are as follows Figure 3 As shown ( Figure 3 The catalytic performance test results of the PtPdNi / CeO2 / Al2O3-methylsilane catalyst in CO and SO2 impurity gases overlapped. Figure 3 It can be seen that the methylsilane hydrophobically modified PtPdNi / CeO2 / Al2O3 catalyst exhibits stable catalytic efficiency in both 100 ppm CO and 100 ppm SO2 impurity gases, with no degradation after 20 hours. However, the methylsilane hydrophobically modified Pt / Al2O3 catalyst struggles to maintain high catalytic efficiency in both 100 ppm CO and 100 ppm SO2 impurity gases, showing significant degradation.

[0074] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the 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 invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for preparing a room-temperature deoxygenation and dehydrogenation bifunctional catalyst, characterized in that, The preparation method includes the following steps: The carrier material was immersed in a cerium source solution, the solvent was evaporated under negative pressure, and then dried and calcined to obtain a carrier material modified with a CeO2 oxygen regulation layer. The support material modified with the CeO2 oxygen regulation layer was immersed in a solution containing platinum, palladium and nickel sources. After the solvent was evaporated by rotary evaporation under negative pressure, it was dried and reduced under a hydrogen atmosphere to obtain PtPdNi / CeO2 / support. The PtPdNi / CeO2 / support was impregnated 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 molecular sieve carrier, alumina carrier, mesoporous material carrier and porous ceramic spherical carrier; the cerium source includes at least one of cerium nitrate, cerium chloride, cerium ammonium 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 working conditions for calcination include: a temperature of 350–1000℃ and a time of 0.1–12 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 regulation 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, platinum acetylacetonate, and dinitrosodiamineplatinum; the palladium source includes palladium chloride, palladium nitrate, palladium acetate, palladium sulfate, and palladium acetylacetonate; 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 bifunctional catalyst according to claim 1, characterized in that, The operating conditions for the reduction reaction under a hydrogen atmosphere include: a temperature of 150–800°C and a time of 0.1–12 hours.

6. The preparation method of the room-temperature deoxygenation and dehydrogenation bifunctional catalyst according to claim 1, characterized in that, The weight ratio of the PtPdNi / CeO2 / support to 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, and methoxytriphenylsilane, and the fluorosilanes include triethoxy-1H,1H,2H,2H-tridecylfluoron-octylsilane, 1H,1 H,2H,2H-perfluorodecyltriethoxysilane, trimethoxy(1H,1H,2H,2H-tridecylfluoron-octyl)silane, trimethoxy(1H,1H,2H,2H-nonafluorohexyl)silane, trimethoxy(1H,1H,2H,2H-heptafluorodecyl)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 bifunctional catalyst for deoxygenation and dehydrogenation at room temperature, characterized in that, The ambient temperature deoxygenation and dehydrogenation bifunctional catalyst is prepared by the preparation method described in any one of claims 1 to 6.

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

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