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Catalyst for synthesizing methanol through carbon dioxide hydrogenation as well as preparation method and application thereof

A technology for synthesizing methanol and carbon dioxide, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, hydroxyl compound preparation, etc., can solve the problem of methanol selectivity and low yield, and low carbon dioxide conversion rate and other problems, to achieve the effect of easy industrial amplification, large number of strong alkaline sites, and stable performance

Inactive Publication Date: 2013-08-28
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the main problems of copper-based catalysts for the hydrogenation of carbon dioxide to methanol are the low conversion rate of carbon dioxide and the low selectivity and yield of methanol.

Method used

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  • Catalyst for synthesizing methanol through carbon dioxide hydrogenation as well as preparation method and application thereof
  • Catalyst for synthesizing methanol through carbon dioxide hydrogenation as well as preparation method and application thereof
  • Catalyst for synthesizing methanol through carbon dioxide hydrogenation as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1. Prepare the mixed solution according to the molar ratio of metal atoms as follows: Cu2Zn1Al0.9La0.1 (each element is dissolved in the middle of deionized water in the form of nitrate to form a mixed solution), in addition, sodium hydroxide and sodium carbonate molar ratio It is 10:1 to make a mixed precipitant solution. At 60 °C, the two mixed solutions were co-precipitated. The precipitation process needs to be fully stirred to maintain pH = 13, aged for 36 h under stirring conditions at 40 °C, and the precipitate was washed with deionized water until no sodium ions were detected. At 160 °C dried at 700 °C for 2 h to obtain CuO / ZnO / Al 2 o 3 / La 2 o 3Metal oxide catalyst, the metal atom molar ratio of this catalyst is: n(Cu):n(Zn):n(Al):n(La) = 2:1:0.9:0.1, it is crushed to 40-60 mesh . The reaction of hydrogenation of carbon dioxide to methanol was carried out in a fixed-bed reactor. After reduction with pure hydrogen at 250 °C for 15 h, it was coole...

Embodiment 2

[0019] Embodiment 2. The mixed solution is prepared according to the molar ratio of metal atoms as follows: Cu1Zn1Al0.9Ga0.1 (each element is dissolved in the middle of deionized water in the form of nitrate to form a mixed solution), in addition, sodium hydroxide and sodium carbonate molar ratio It is 2:1 to make a mixed precipitant solution. At 10 °C, the two mixed solutions were co-precipitated. The precipitation process required sufficient stirring to maintain pH = 13. Aging was carried out at 100 °C for 1 h, and the precipitate was washed with deionized water until no sodium ions were detected. dried at 400 °C for 8 h to obtain CuO / ZnO / Al 2 o 3 / Ga 2 o 3 Metal oxide catalyst, the molar ratio of metal atoms of the catalyst is: n(Cu):n(Zn):n(Al):n(Ga) = 1:1:0.9:0.1, which is crushed to 40-60 mesh . The reaction of hydrogenation of carbon dioxide to methanol was carried out in a fixed-bed reactor. The pure hydrogen was reduced at 350 °C for 4 h and then cooled to room t...

Embodiment 3

[0021] Example 3. A mixed solution was prepared according to the molar ratio of metal atoms as follows: Cu2Zn1Al0.8Y0.1Zr0.1 (except that Zr is in the form of zirconyl nitrate, and all other elements are dissolved in deionized water in the form of nitrate to form a mixed solution), In addition, the molar ratio of sodium hydroxide and sodium carbonate is 5:1 to form a mixed precipitant solution. At 25 °C, the two mixed solutions were co-precipitated. The precipitation process required sufficient stirring to maintain pH = 10. Aging was carried out at 60 °C for 15 h under stirring conditions. The precipitate was washed with deionized water until no sodium ions were detected. dried at 500 °C for 4 h to obtain CuO / ZnO / Al 2 o 3 / Y 2 o 3 / ZrO 2 Metal oxide catalyst, the metal atom molar ratio of this catalyst is: n(Cu):n(Zn):n(Al):n(Y):n(Zr)=2:1:0.8:0.1:0.1, will It is crushed to 40-60 mesh. The reaction of hydrogenation of carbon dioxide to methanol was carried out in a fixed-...

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Abstract

The invention discloses a catalyst for synthesizing methanol through carbon dioxide hydrogenation, which is composed of oxides, wherein measured by metals, the mole ratio of various metals is as follows: [n(Cu)+n(Zn)+n(MA)]:[n(Al)+n(MB)]=2-15, n(Cu):n(Zn)=0.5-4, n(MA):n(Zn)=0-1, and n(MB):n(Al)=0-9, MA represents monovalent or divalent metal ions, and MB represents trivalent or tetravalent metal ions. The catalyst has the advantages of high carbon dioxide conversion ratio, good methanol selectivity and high methanol yield.

Description

technical field [0001] The invention belongs to a catalyst and a preparation method, in particular to a carbon dioxide hydrogenation methanol catalyst, a preparation method and an application. Background technique [0002] In order to alleviate or even eliminate excessive CO 2 The harm caused by emissions to the environment, and to solve the problem of carbon resources, it is necessary to develop 2 Technologies that transform into valuable materials. In view of the fact that methanol is not only an important raw material for the chemical industry and petrochemical industry, but also a clean fuel, CO 2 The process of hydrogenation to methanol has received extensive attention. However, CO 2 Very stable, activation is difficult, so catalyst development for this process is key. [0003] Due to the advantages of low cost and high low-pressure activity, copper-based catalysts have become the most studied catalyst system, and the development of improved copper-based cataly...

Claims

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Application Information

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IPC IPC(8): B01J23/83B01J23/825B01J23/80B01J23/889C07C31/04C07C29/154
CPCY02P20/52
Inventor 肖福魁高鹏赵宁李枫王峰
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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