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Catalyst for preparing methanol through hydrogenation of carbon dioxide and preparation method and application thereof

A carbon dioxide and catalyst technology, which is applied to the catalyst and preparation field of carbon dioxide hydrogenation to prepare methanol, can solve the problem that the carbon dioxide conversion rate of the catalyst cannot meet the requirements of commercialization, and achieves easy adsorption and activation of carbon dioxide conversion, improved catalytic performance, and high performance. The effect of methanol selectivity

Active Publication Date: 2019-10-15
甄崇礼
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the carbon dioxide conversion rate of these catalysts still cannot meet the requirements of commercialization.

Method used

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  • Catalyst for preparing methanol through hydrogenation of carbon dioxide and preparation method and application thereof
  • Catalyst for preparing methanol through hydrogenation of carbon dioxide and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023]Take by weighing 241.6 grams of copper nitrate trihydrate, 148.7 grams of zinc nitrate hexahydrate, 1775.5 grams of aluminum nitrate nonahydrate, be dissolved in 10000 grams of deionized water, the mol ratio of the three metals is 1:0.5:2.5, stir evenly, Preparation of 5% sodium carbonate solution can be completely precipitated. Add the mixed metal salt solution and sodium carbonate solution dropwise into the round bottom flask at the same time, stir well, control the temperature of the system to 70°C, pH at 8, continue stirring for 2 hours after the precipitation is complete, then filter, the filter cake is deionized Wash with water until the pH of the effluent is 7, and dry the filter cake in an oven at 105°C for 1 hour. The resulting product is placed in a pressure-bearing container, filled with carbon dioxide gas, and roasted at 600°C. Pressurize the pressure in the vessel to keep the pressure at 2 MPa, and roast for 10 hours, and after the temperature and pressure d...

Embodiment 2

[0025] Take by weighing 241.6 grams of copper nitrate trihydrate, 148.7 grams of zinc nitrate hexahydrate, and 1775.5 grams of aluminum nitrate nonahydrate, which are dissolved in 10000 grams of deionized water. The mol ratio of the three metals is 1:0.5:2.5, stirred evenly, and prepared 5% sodium carbonate solution can be completely precipitated. Add the mixed metal salt solution and sodium carbonate solution dropwise into the round-bottomed flask at the same time, stir well, control the temperature of the system at 80°C, and the pH at 9. After the precipitation is complete, continue to stir for 2 hours for aging, then filter, and the filter cake is deionized Wash with water until the pH of the effluent is 7, and dry the filter cake in an oven at 105°C for 1 hour. The obtained product is placed in a pressure-bearing container, filled with carbon dioxide gas, and roasted at 700°C. Pressurize the pressure in the vessel to keep the pressure at 4MPa, roast for 12 hours, and then ...

Embodiment 3

[0027] Take by weighing 241.6 grams of copper nitrate trihydrate, 297.4 grams of zinc nitrate hexahydrate, and 2130.6 grams of aluminum nitrate nonahydrate, which are dissolved in 10,000 grams of deionized water. The mol ratio of the three metals is 1:1:3, stirred evenly, and prepared 5% sodium carbonate solution can be completely precipitated. Add the mixed metal salt solution and sodium carbonate solution dropwise into the round-bottomed flask at the same time, stir well, control the temperature of the system at 80°C, and the pH at 8. After the precipitation is complete, continue to stir for 2 hours for aging, then filter, and the filter cake is deionized Wash with water until the pH of the effluent is 7, and dry the filter cake in an oven at 105°C for 1 hour. The resulting product is placed in a pressure-bearing container, filled with carbon dioxide gas, and roasted at 600°C. Pressurize the pressure in the vessel to keep the pressure at 2 MPa, roast for 12 hours, and then o...

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Abstract

The invention relates to a catalyst for preparing methanol, in particular to a catalyst for preparing the methanol through hydrogenation of carbon dioxide and a preparation method and application thereof. The preparation method comprises the following steps: mixing a mixed metal salt solution of copper salt, zinc salt and aluminum salt with a sodium carbonate solution, stirring for precipitating,then aging, filtering, drying a filter cake, then placing in a container, inflating carbon dioxide gas, calcining, keeping the pressure at 2-4 MPa during calcination, reducing the temperature and thepressure after completion of the calcination to obtain a catalyst precursor, and moulding to obtain the catalyst. The catalyst has high activity and high methanol selectivity, and at relatively low reaction temperature (a 200 DEG C condition), the carbon dioxide conversion rate reaches 25% or above and the methanol selectivity reaches 85% or above. By the preparation method provided by the invention, the crystal form of the catalyst is converted so as to facilitate adsorption and activation of the carbon dioxide, so that the catalytic performance of the catalyst is greatly improved.

Description

technical field [0001] The invention relates to a catalyst for preparing methanol, in particular to a catalyst for preparing methanol by hydrogenation of carbon dioxide, a preparation method and application thereof. Background technique [0002] The massive use of fossil fuels since the Industrial Revolution has brought about the rapid development of the human economy, but at the same time excessive CO 2 Emissions have also brought about a series of global environmental problems such as the greenhouse effect, climate warming, glacier melting, and climate anomalies. Reasonable use of CO 2 As a carbon source, it can be regenerated by chemical and chemical means to form the recycling of carbon resources, which will not only reduce the dependence on traditional fossil energy, but also have important practical significance for improving the environment and ensuring the sustainable development of human beings. Among them, CO 2 The use of hydrogenation to synthesize methanol is th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/80C07C31/04C07C29/154
CPCB01J23/80B01J23/002C07C29/154B01J2523/00B01J2523/27B01J2523/17C07C31/04Y02P20/52
Inventor 张傑赵宏甄崇礼梁鑫
Owner 甄崇礼