Catalyst for directly preparing dimethyl ether using carbon dioxide and use method thereof

A carbon dioxide and catalyst technology, which is applied in the field of catalysts for the preparation of dimethyl ether, can solve the problems of low conversion rate of carbon dioxide and poor selectivity of dimethyl ether, etc., and achieve the effect of overcoming the low conversion rate of carbon dioxide

Inactive Publication Date: 2009-03-25
SHANGHAI INSTITUTE OF TECHNOLOGY
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of low carbon dioxide conversion rate and/or poor selectivity of dimethyl ether in bifunctional

Method used

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  • Catalyst for directly preparing dimethyl ether using carbon dioxide and use method thereof

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Experimental program
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Effect test

Embodiment 1

[0021] Dissolve 12.2 grams of copper nitrate, 7.3 grams of zinc nitrate, 7.0 grams of zirconium nitrate and 4.6 grams of titanium tetrachloride in 200 milliliters of distilled water to make a mixed solution, and add sodium carbonate with a concentration of 1 mol / L to the above mixed solution under stirring The solution was precipitated, and the obtained sediment was aged at room temperature for 1 hour, then filtered, dried, and then calcined at 350° C. for 6 hours to obtain catalyst powder. Finally, tablet, pulverize and sieve 20-40 mesh particles to obtain methanol synthesis active component A, wherein the weight percentage of each component is CuO 40%, ZnO 20%, TiO 2 20%, ZrO 2 20%.

Embodiment 2

[0023] Adopt the method identical with embodiment 1 to make CuO-ZnO-TiO 2 -ZrO 2 Methanol synthesis active component B, wherein the weight percentage of each component is CuO 40%, ZnO 2 30%, TiO 2 10%, ZrO 2 20%.

Embodiment 3

[0025] Adopt the method identical with embodiment 1 to make CuO-ZnO-TiO 2 -ZrO 2 Methanol synthesis active component C, wherein the weight percentage of each component is CuO 50%, ZnO 20%, TiO 2 10%, ZrO 2 20%.

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Abstract

The invention discloses a bi-functional catalyst for directly preparing dimethyl ether by carbon dioxide, which is composed of a methanol synthesis active component and a methanol dehydration active component, and the core is to take a composite oxide Cu-Zn-Ti-Zr as the methanol synthesis active component, wherein, the content of CuO is between 10 and 90 percent, 30 to 70 percent preferred; the content of ZnO is 5 to 50 percent, 10 to 40 percent preferred; the molar ratio of Ti/Zr is 0.2 to 6, 0.4 to 4 preferred, the methanol dehydration active component is one or more than one mixture in molecular sieves of HZSM-5, HY, HBeta and HMCM-22, and the methanol synthesis active component and the methanol dehydration active component are mixed through a mechanical mixing method, an impregnation method, a coprecipitation method or a precipitation-deposition method, so as to obtain the catalyst. The prepared bi-functional catalyst has the advantages of high conversion of carbon dioxide and good dimethyl ether selectivity.

Description

technical field [0001] The invention relates to a catalyst for preparing dimethyl ether, in particular to a catalyst for directly preparing dimethyl ether from carbon dioxide. Background technique [0002] carbon dioxide (CO 2 ) is the most important greenhouse gas that causes global warming. In order to make atmospheric CO 2 In order to avoid catastrophic changes in the climate, in addition to taking measures to increase the efficiency of energy conversion and utilization, and to replace high-carbon fuels with low-carbon fuels or non-carbon fuels, the CO 2 Recycling and utilizing it has become a very important method. Among them, the relevant CO 2 The research on catalytic activation has been paid more and more attention by governments and researchers of various countries. On the other hand, with the continuous depletion of fossil resources such as coal, oil and natural gas, the prices of energy, chemical raw materials and products have risen rapidly, while CO 2 As a ...

Claims

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Application Information

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IPC IPC(8): B01J29/42B01J29/064C07C43/04C07C41/01
Inventor 毛东森王嵩卢冠忠王蓉吴燕
Owner SHANGHAI INSTITUTE OF TECHNOLOGY
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