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Mesoporous silica coated platinum-copper alloy catalyst and preparation method thereof

A technology of mesoporous silica and microporous silica, which is applied in the field of mesoporous silica-coated platinum-copper alloy ethanol steam reforming hydrogen production catalyst and its preparation, can solve the problem of unsatisfactory catalyst stability, Catalytic performance reduction, reduction of catalyst active site contact surface and other problems, to achieve the effect of reducing content, reducing by-products and reducing carbon deposition

Inactive Publication Date: 2019-03-29
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the catalytic active sites of ethanol steam reforming catalysts for hydrogen production are mainly loaded on the surface of the carrier by impregnation method, co-precipitation method and deposition precipitation method. Due to the high surface energy of small metal particles, they are easy to migrate during the catalytic reaction. Agglomeration and sintering form large metal particles, reduce the contact surface of the active site of the catalyst, and significantly reduce the catalytic performance, so that the stability of the catalyst cannot meet the needs of the industry

Method used

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  • Mesoporous silica coated platinum-copper alloy catalyst and preparation method thereof
  • Mesoporous silica coated platinum-copper alloy catalyst and preparation method thereof
  • Mesoporous silica coated platinum-copper alloy catalyst and preparation method thereof

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Embodiment 1

[0029] A preparation method of a mesoporous silica-coated platinum-copper alloy ethanol steam reforming hydrogen production catalyst, comprising the following steps:

[0030] 1) Dissolve 0.04g of polyvinylpyrrolidone (molecular weight: 30,000) in 2mL of deionized water, stir at room temperature for 30min, and ultrasonicate for 10min; then add 0.02g of glycine to the mixed solution, stir at room temperature for 10min; then add 1mL to the mixed solution Chloroplatinic acid hexahydrate aqueous solution (30mM) and 1mL copper nitrate aqueous solution (30mM), stirred at room temperature for 30min; then put the mixed solution into a stainless steel reaction kettle lined with polytetrafluoroethylene, and react statically in a thermostat at 200°C 6h: After the reaction is over, take out the reaction kettle and place it in the quenching tank, and quickly cool it to 20℃ in deionized water at 10°C; open the reaction kettle, take out the polytetrafluoroethylene container, and crystallize th...

Embodiment 2

[0040] A preparation method of a mesoporous silica-coated platinum-copper alloy ethanol steam reforming hydrogen production catalyst, comprising the following steps:

[0041] 1) Dissolve 0.05g of polyvinylpyrrolidone in 3mL of deionized water, stir at room temperature for 30min, and ultrasonicate for 10min; then add 0.04g of tryptophan to the mixed solution, stir at room temperature for 10min; then add 0.5mL of tetrachloride to the mixed solution Platinum chloride aqueous solution (30mM) and 1.5mL copper nitrate aqueous solution (30mM), stirred at room temperature for 30min; then put the mixed solution into a stainless steel reactor with a polytetrafluoroethylene liner, and statically reacted in a 200°C thermostat for 6h: After the reaction is over, take out the reaction kettle and place it in a quenching tank, and quickly cool it to 20°C in deionized water at 10°C; open the reaction kettle, take out the polytetrafluoroethylene container, and place the crystallization solution ...

Embodiment 3

[0048] A preparation method of a mesoporous silica-coated platinum-copper alloy ethanol steam reforming hydrogen production catalyst, comprising the following steps:

[0049] 1) Dissolve 0.04g of polyvinylpyrrolidone in 3mL of deionized water, stir at room temperature for 30min, and ultrasonicate for 10min; then add 0.04g of glycine to the mixed solution, and stir at room temperature for 10min; then add 0.8mL of chloroplatinum hexahydrate to the mixed solution Acid aqueous solution (30mM) and 1.2mL cupric chloride aqueous solution (30mM), stirred at room temperature for 30min; then put the mixed solution into a stainless steel reactor with a polytetrafluoroethylene liner, and statically reacted in a 200°C thermostat for 6h: After the reaction is over, take out the reaction kettle and place it in a quenching tank, and quickly cool it to 20°C in deionized water at 10°C; open the reaction kettle, take out the polytetrafluoroethylene container, and place the crystallization solutio...

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Abstract

The invention relates to the field of hydrogen production catalysts, and concretely relates to a mesoporous silica coated platinum-copper alloy catalyst for ethanol steam reforming for generating hydrogen, and a preparation method thereof. The catalyst is composed of a core phase platinum-copper alloy structure and a shell layer mesoporous silica structure. Catalytically active sites are wrapped within a mesoporous material in an alloy form. The catalyst plays a great role in improving the catalytic reaction performance and the structural stability. The alloy is conducive to the synergistic effect of bimetals in an ethanol steam reforming reaction, so the content of byproducts is reduced, and carbon deposit is reduced; the shell layer can well stabilize and protect catalytically active components; the catalyst having the above structure can effectively avoid migration and agglomeration of the active components; and the mesoporous structure of the shell layer facilitates the effective diffusion of reaction molecules and product molecules. The activity, the selectivity and the stability of the catalyst for the ethanol steam reforming reaction are improved.

Description

technical field [0001] The invention relates to the field of hydrogen production catalysts, in particular to a mesoporous silica-coated platinum-copper alloy ethanol steam reforming hydrogen production catalyst and a preparation method thereof. Background technique [0002] The three fossil fuels of oil, coal and natural gas are still the most important energy consumption resources in the world today. The use of traditional energy is increasing year by year, and we are facing the cruel reality of energy depletion and environmental pollution. Hydrogen energy is known as the most ideal clean energy in the 21st century, and has advantages that other energy sources cannot match. Among them, hydrogen production by steam reforming of biomass ethanol does not rely on traditional fossil energy, and has the advantages of non-toxicity, easy storage and transportation, high unit energy, and high hydrogen content, which has become a hot spot in recent years. [0003] At present, the ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J35/02C01B3/32B01J35/00
CPCC01B3/326B01J23/8926C01B2203/0233C01B2203/1229C01B2203/1076C01B2203/1088B01J35/398
Inventor 谢鲜梅代蓉郑子良连晨帅王诗瑶
Owner TAIYUAN UNIV OF TECH