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Reverse water gas shift catalyst, preparation method and application thereof

A reverse water gas and catalyst technology, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, heterogeneous catalyst chemical elements, etc., can solve the problems of low conversion rate of carbon dioxide and poor thermal stability of catalysts, etc. Poor stability and water resistance, high industrial application value, high activity effect

Pending Publication Date: 2022-01-11
源创核新(北京)新材料科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The technical problem to be solved by the present invention is that the conversion rate of carbon dioxide is not high and the thermal stability of the catalyst is not good in the existing non-noble metal catalytic process

Method used

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  • Reverse water gas shift catalyst, preparation method and application thereof
  • Reverse water gas shift catalyst, preparation method and application thereof
  • Reverse water gas shift catalyst, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] 1) make 0.5mol / L solution with zirconium oxynitrate and water, measure 500mL above-mentioned zirconium oxynitrate solution and add in the hydrothermal still of 1L polytetrafluoroethylene lining, add 150g urea to it again, the system is at 120 ℃ Treated under hydrothermal conditions for 48 hours, the obtained solid was washed with water until neutral, and then vacuum-dried at 120 °C to obtain ZrO z (OH) 4-2z (The number of hydroxyl groups on the zirconium hydroxide gel can be adjusted depending on the dry contrast, so the subscript z of the O atom indicates a variable value).

[0053] 2) The obtained zirconium hydroxide precursor ZrO z (OH) 4-2z Disperse in 1000ml of anhydrous toluene solvent, in N 2 Under the protection, 200g of 3-aminopropyltriethoxysilane was heated and stirred under reflux for 8h, filtered and dried under vacuum at 60°C to obtain 90g of solid carrier.

[0054] 3) 60 g of the solid carrier obtained in the above step 2) was placed in N 2 Disperse ...

Embodiment 2

[0056] 1) zirconium oxynitrate and cerium nitrate are made into 0.5mol / L (Zr / Ce mol ratio is 8:2) aqueous solution, measure 500mL of above-mentioned solution and add in the hydrothermal still of 1L polytetrafluoroethylene lining, then to wherein 200g of urea was added, the system was treated under hydrothermal conditions at 120°C for 48 hours, the obtained solid was washed with water until neutral, and then vacuum-dried at 120°C to obtain Zr 0.8 Ce 0.2 O z (OH) 4-2z (According to the degree of drying, the number of hydroxyl groups on the zirconium hydroxide gel can be adjusted, so the subscript z of the O atom represents a variable value).

[0057] 2) Disperse the obtained zirconium hydroxide precursor in 1000 ml of anhydrous toluene solvent, under N 2 Under the protection, 200 g of 3-aminopropyltriethoxysilane was heated and stirred under reflux for 8 h, filtered and dried under vacuum at 60 °C to obtain 90 g of a solid carrier.

[0058] 3) 60 g of the solid carrier obtai...

Embodiment 3

[0060] The preparation process is the same as in Example 2, except that the active metal precursor is selected from bissalicylaldehyde ethylenediamine nickel (II), and the obtained catalyst is 10% Ni / Zr 0.8 Ce 0.2 O z @SiO 2 , the pre-reduction temperature of the catalyst before use was 450 °C.

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Abstract

The invention discloses a reverse water gas shift catalyst and a preparation method thereof and application in reverse water gas shift. The catalyst is a supported catalyst, wherein the active metal center contains one, two or three metal simple substances or oxides selected from Ni, Cu and Co, the carrier comprises a carrier main component and a surface coating layer, the surface coating layer modulates the surface pore structure of the catalyst, the active metal center is immobilized on the carrier through a chemical bonding anchoring technology, and then the high-dispersion catalyst is formed through Si or Al hydroxide deposition and a roasting reduction process. According to the invention, the preparation method of the catalyst overcomes the defects that a traditional copper-based catalyst is poor in thermal stability and water resistance; and in a reaction process, the generation of by-products methane and methanol is inhibited, and the catalyst is high in selectivity, is a non-noble metal reverse water gas shift catalyst with high activity and good stability, and has extremely high industrial application value.

Description

[0001] This application claims the priority right of the Chinese invention patent with the title of "a reverse water gas shift catalyst and its preparation method and application" submitted on October 23, 2020, and the application number is 202011143838.8, the entire content of this application is taken as reference All incorporated herein. technical field [0002] The invention belongs to the field of catalytic chemical industry, and in particular relates to a catalyst for reverse water gas shift and a preparation method and application thereof, in particular to a single-site component catalyst catalyzing the selective hydrogenation of carbon dioxide to prepare carbon monoxide. Background technique [0003] With the emergence of the industrial revolution and the advancement of industrial technology, the consumption rate of fossil energy has increased sharply, resulting in the decomposition and release of carbon in petrochemical resources much faster than the rate of carbon d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/72B01J23/83B01J37/10C01B32/40
CPCB01J23/72B01J23/83B01J23/002B01J37/10C01B32/40B01J2523/00B01J2523/3712B01J2523/41B01J2523/48B01J2523/47Y02P20/52
Inventor 牟新东张新志王文久尹斌石健刘涛
Owner 源创核新(北京)新材料科技有限公司
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