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Copper based catalyst used for hydrogenating carbon dioxide to synthesize methanol, and preparation method and application thereof

A copper-based catalyst, carbon dioxide technology, used in the preparation of metal/metal oxide/metal hydroxide catalysts, organic compounds, catalyst activation/preparation, etc., can solve problems such as poor methanol selectivity and achieve mutual synergy The effect of strong, long operating life and simple preparation method

Active Publication Date: 2015-04-01
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the methanol selectivity of this catalyst is not good

Method used

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  • Copper based catalyst used for hydrogenating carbon dioxide to synthesize methanol, and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Synthesize the copper-based catalyst according to the mole percentage of the following metal elements: Cu:Zn:Al:Zr=30:40:20:10. Weigh 72.48g of copper nitrate, 119g of zinc nitrate, 75.03g of aluminum nitrate and 23.12g of zirconyl nitrate according to the molar percentage of 30:40:20:10.

[0035] Firstly, zinc nitrate, aluminum nitrate and zirconyl nitrate were dissolved in 1L of deionized water successively to prepare mixed solution 1.

[0036] (2) Weigh 105.99g of sodium carbonate and 40g of sodium hydroxide at a molar ratio of 1:1, mix and dissolve them in deionized water to prepare an alkaline precipitation solution 2 with a molar concentration of 1mol / L.

[0037] Under the conditions of a reaction temperature of 25°C and mechanical stirring, the above 1L solution 1 and 1.8L solution 2 were co-precipitated by co-precipitation method, and the pH of the precipitation was controlled at pH=8 to form a co-precipitation solution.

[0038] (3) Dissolve the copper nit...

Embodiment 2

[0040] (1) Synthesize the copper-based catalyst according to the mole percentage of the following metal elements: Cu:Zn:Al:Zr=35:40:15:10. Weigh 62.17g of copper sulfate, 119g of zinc nitrate, 20g of aluminum chloride, 23.12g of zirconyl nitrate and 10g of polyvinylpyrrolidone according to the molar percentage of 35:40:15:10:1.

[0041] First, zinc nitrate, aluminum chloride, zirconyl nitrate and polyvinylpyrrolidone were dissolved in 1L of deionized water in sequence to prepare mixed solution 1.

[0042](2) Weigh 138.21g of potassium carbonate and 40g of sodium hydroxide at a molar ratio of 1:1, dissolve them in deionized water, and prepare an alkaline precipitation solution 2 with a molar concentration of 1mol / L.

[0043] Under the conditions of a reaction temperature of 25°C and mechanical stirring, the co-precipitation method was used to co-precipitate the above 1L solution 1 and 1.7L solution 2, and control the pH of the precipitate to pH=9 to form a co-precipitation solu...

Embodiment 3

[0046] (1) Synthesize the copper-based catalyst according to the mole percentage of the following metal elements: Cu:Zn:Al:Zr=40:40:10:10. First weigh 96.64g of copper nitrate, 54.52g of zinc chloride, 37.51g of aluminum nitrate, 32.23g of zirconium oxychloride and 20g of polyvinylpyrrolidone according to the molar percentage of 40:40:10:10:2.

[0047] First, zinc chloride, aluminum nitrate, zirconium oxychloride and polyvinylpyrrolidone were dissolved in 1L of deionized water in sequence to prepare mixed solution 1.

[0048] (2) Weigh 121.89g of sodium carbonate and 64.53g of potassium hydroxide at a molar ratio of 1:1, dissolve them in deionized water, and prepare an alkaline precipitation solution 2 with a molar concentration of 1mol / L.

[0049] Under the conditions of a reaction temperature of 25°C and mechanical stirring, the co-precipitation method was used to co-precipitate the above 1L solution 1 and 1.65L solution 2, and control the pH of the precipitate to pH=10 to f...

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Abstract

The invention discloses a copper based catalyst used for hydrogenating carbon dioxide to synthesize methanol, and a preparation method and an application thereof. The preparation method of the catalyst comprises the following steps: 1, processing a zinc salt, an aluminum salt, a zirconium salt and a stabilizer to prepare a first solution, or processing the zinc salt, the aluminum salt and the zirconium salt to prepare a second solution; 2, processing carbonate and hydroxide to prepare a third solution; 3, processing a copper salt to prepare a fourth solution; 4, processing the first solution and the third solution to form a first precipitation solution, or processing the second solution and the third solution to form a second precipitation solution; 5, adding the fourth solution to the first precipitation solution to form a third precipitation solution or adding the fourth solution to the second precipitation solution to form a fourth precipitation solution, ageing after Cu in the precipitation solution precipitates, and washing; and 6, drying, and calcining. The catalyst contains 30-50% of Cu, 20-40% of Zn, 10-20% of Al, and 5-20% of Zr. The catalyst is used for a reaction for hydrogenating carbon dioxide to synthesize methanol.

Description

technical field [0001] The invention relates to a copper-based catalyst, in particular to a copper-based catalyst for hydrogenation of carbon dioxide to synthesize methanol, its preparation method and application. Background technique [0002] Methanol is a widely used chemical basic raw material and environmentally friendly power fuel, widely used in organic synthesis, fuel, medicine and national defense industry and other fields. by CO 2 Hydrogenation of methanol can not only reduce the greenhouse gas CO 2 emissions, improve the living environment of human beings, and also solve the demand for methanol in the chemical and energy fields, and realize the combustion of carbon-containing energy→CO 2 →Methanol→Carbon-containing energy combustion is an effective cycle of carbon resources. Currently, research CO 2 The focus of methanol hydrogenation is to improve catalyst activity and methanol selectivity, and the key to solving this problem is the development of high-perform...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/80C07C31/04C07C29/154B01J37/03
CPCY02P20/52
Inventor 孙予罕魏伟解荣永夏林王慧
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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