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Catalyst for preparing methanol through CO2 hydrogenation as well as preparation method and application of catalyst

A catalyst and hydrogen production technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve emissions and environmental pollution, catalysts are easy to sinter, methanol selectivity It can improve the reaction activity, good CO2 conversion and methanol yield, and high methanol selectivity.

Pending Publication Date: 2022-03-11
上海簇睿低碳能源技术有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditionally, methanol is produced in the industry through the conversion of synthesis gas, but it is mainly faced with the catalyst (Cu / ZnO / Al 2 o 3 ) Active sites are easy to sinter under the reaction conditions, resulting in poor stability. In addition, the output of raw material synthesis gas in this process is often accompanied by the consumption of fossil resources such as coal and natural gas and the CO caused by the conversion process. 2 Emissions and Environmental Pollution
[0004] Currently CO 2 Hydrogenation of methanol mainly uses supported metal or metal oxide catalysts, such as traditional Cu / ZnO / Al 2 o 3 ,Cu / ZrO 2 , traditional Cu-based catalysts show very low methanol selectivity above 300 °C

Method used

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  • Catalyst for preparing methanol through CO2 hydrogenation as well as preparation method and application of catalyst
  • Catalyst for preparing methanol through CO2 hydrogenation as well as preparation method and application of catalyst
  • Catalyst for preparing methanol through CO2 hydrogenation as well as preparation method and application of catalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] ZnCe oxide solid solution was prepared by co-precipitation method (Zn x Ce 1-x O). Dissolve zinc nitrate and cerous nitrate at a molar ratio of 0.05:0.95 in 240 mL of deionized water to form salt solution A (add two kinds of nitrates with a mass of 0.5 g and 14 g respectively), and stir at 30°C for 1 h. Then 6.660g of ammonium carbonate was dissolved in 220mL of deionized water and fully stirred and dissolved to form alkaline solution B. Transfer solution A to a round-bottomed flask and preheat it in an oil bath at 70°C, then add solution B to the round-bottomed flask at a rate of 3ml / min with a peristaltic pump under nitrogen purging, and then continue stirring at 70°C 3h. The resulting precipitate was cooled to room temperature, and the precipitate and the solution were separated under high-speed centrifugation. The precipitate was washed with deionized water and then centrifuged again. After repeating three times, the precipitate was dried at 60°C for 12h, and the...

Embodiment 2

[0048] ZnCe oxide solid solution was prepared by co-precipitation method (Zn x Ce 1-x O). Dissolve zinc nitrate and cerous nitrate at a molar ratio of 0.1:0.9 in 240 mL of deionized water to form salt solution A (the mass of the two nitrates added is 1 g and 13.3 g respectively), and stir at 30°C for 1 h. Then 6.660g of ammonium carbonate was dissolved in 220mL of deionized water and fully stirred and dissolved to form alkaline solution B. Transfer solution A to a round-bottomed flask and preheat it in an oil bath at 70°C, then add solution B to the round-bottomed flask at a rate of 3ml / min with a peristaltic pump under nitrogen purging, and then continue stirring at 70°C 3h. The resulting precipitate was cooled to room temperature, and the precipitate and the solution were separated under high-speed centrifugation. The precipitate was washed with deionized water and then centrifuged again. After repeating three times, the precipitate was dried at 60°C for 12h, and then bak...

Embodiment 3

[0051] ZnCe oxide solid solution was prepared by co-precipitation method (Zn x Ce 1-x O). Dissolve zinc nitrate and cerous nitrate at a molar ratio of 0.15:0.85 in 240 mL of deionized water to form salt solution A (add two nitrates with a mass of 1.5 g and 12.5 g respectively), and stir at 30°C for 1 h. Then 6.660g of ammonium carbonate was dissolved in 220mL of deionized water and fully stirred and dissolved to form alkaline solution B. Transfer solution A to a round-bottomed flask and preheat it in an oil bath at 70°C, then add solution B to the round-bottomed flask at a rate of 3ml / min with a peristaltic pump under nitrogen purging, and then continue stirring at 70°C 3h. The resulting precipitate was cooled to room temperature, and the precipitate and the solution were separated under high-speed centrifugation. The precipitate was washed with deionized water and then centrifuged again. After repeating three times, the precipitate was dried at 60°C for 12h, and then baked...

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Abstract

The invention provides a catalyst for preparing methanol through CO2 hydrogenation as well as a preparation method and application of the catalyst. The catalyst is a metal oxide solid solution, the general formula of the metal oxide solid solution is ZnxM1-xO, x is 0.05-0.3, and M is selected from at least one of Ce, Cr and Ga. The preparation method comprises the following steps: 1) co-precipitating a zinc salt and a salt of an element M; and 2) filtering and roasting the product obtained in the step 1) to obtain the catalyst. The catalyst is used for preparing methanol through carbon dioxide hydrogenation. CO2 and H2 react in the presence of the catalyst to obtain methanol. The catalyst disclosed by the invention can be operated at a high temperature, namely higher than 300 DEG C, has relatively high methanol selectivity, and provides a wide prospect for subsequent industrial application and coupled methanol subsequent conversion processes (MTO and MTG).

Description

technical field [0001] The present invention relates to CO 2 Hydrogenation catalytic conversion technical field, especially related to a kind of CO 2 Catalyst for preparing methanol by hydrogenation, its preparation method and application. Background technique [0002] The combustion of carbon-based fossil fuels (oil, coal, and natural gas) for electricity generation is accompanied by the emission of large amounts of anthropogenic greenhouse gases (GHGs) into the atmosphere, mainly in the form of CO 2 form of emission. 2018 Global CO 2 Emissions are about 3.3 billion tons, CO 2 Atmospheric concentrations have increased from 280ppm before the Industrial Revolution to 410ppm. The resulting greenhouse effect leads to major environmental impacts such as global warming, ocean acidification, sea level rise and climate change. Therefore, green carbon science, including efficient carbon resource processing, utilization, and recycling, is of great significance for closing the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/10C07C29/153C07C31/04
CPCB01J23/10C07C29/153C07C31/04Y02P20/52
Inventor 孙予罕王慧吴兆萱王浩渺黄超杰夏林
Owner 上海簇睿低碳能源技术有限公司
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