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A high temperature resistant carbon dioxide hydrogenation methanol synthesis catalyst and its preparation and application

A technology for carbon dioxide and methanol synthesis, which is applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, hydroxyl compound preparation, etc. Good sintering performance, no decrease in space-time yield, and the effect of improving selectivity

Active Publication Date: 2019-04-09
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the hydrogenation of carbon dioxide to methanol is an exothermic reaction, and a large amount of heat will be released during the reaction, while the copper-based catalyst has poor heat resistance and is easy to sinter.

Method used

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  • A high temperature resistant carbon dioxide hydrogenation methanol synthesis catalyst and its preparation and application
  • A high temperature resistant carbon dioxide hydrogenation methanol synthesis catalyst and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Weigh 5mmol Zn(NO 3 ) 2 ·6H 2 O, 10mmol Zr(NO 3 ) 4 ·5H 2 O is configured into 100mL aqueous solution and placed in a 500mL beaker, weigh 27.5mmol (NH 4 ) 2 CO 3 Configured into 100mL aqueous solution, at 70℃, stirring speed 600r / min, the prepared (NH 4 ) 2 CO 3 The solution is dropped into the metal salt solution, the dropping rate is about 3mL / min, and the (NH 4 ) 2 CO 3 After the solution is consumed, the resulting precipitation mother liquor is aged for 2 hours at 70°C, cooled, filtered naturally, washed 3 times with deionized water, filtered with suction, dried at 60°C, and calcined in air at 500°C for 3 hours to obtain the catalyst oxidation state precursor. Tablets were pressed at 10MPa, crushed, and screened from 40 to 80 meshes for evaluation.

[0014] Weigh 0.15g of the selected catalyst into a reaction tube with an inner diameter of 6mm. 2 Reduce at 300℃ for 2h at a flow rate of 30mL / min, and then introduce feed gas n(H 2 ):n(CO 2 )=3, the reaction was carried out...

Embodiment 2

[0016] The metal salt used in the preparation of the catalyst is 5mmol In(NO 3 ) 3 ·5H 2 O, 10mmol Zr(NO 3 ) 4 ·5H 2 O, the precipitant used is 30.3mmol(NH 4 ) 2 CO 3 . Other preparation and evaluation steps are the same as in Example 1, and the catalyst evaluation results are shown in Table 1.

Embodiment 3

[0018] The metal salt used in the preparation of the catalyst is 5mmol Cd(NO 3 ) 2 ·4H 2 O, 10mmol Zr(NO 3 ) 4 ·5H 2 O, the precipitant used is 27.5mmol (NH 4 ) 2 CO 3 . Other preparation and evaluation steps are the same as in Example 1, and the catalyst evaluation results are shown in Table 1.

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Abstract

Provided are a metal oxide catalyst for methanol synthesis from CO 2 hydrogenation and a preparation method of the catalyst. The catalyst for methanol synthesis from CO 2 hydrogenation is composed of two kinds of metal oxides, denoted as M AO x-M BO y, which is prepared by the method of coprecipitation, wherein M A represents Zn, Cd, In, M B represents Zr, Cr. The catalyst can obviously increase the selectivity of methanol from CO 2 hydrogenation than CuZnO-based catalyst. The selectivity of methanol on the ZnO-ZrO 2 catalyst can reach 80％on the conditions of 5MPa, 330℃, 24000 mL / (g h).

Description

Technical field [0001] The invention belongs to the field of catalysts, and specifically relates to a high-temperature resistant carbon dioxide hydrogenation catalyst for synthesizing methanol, and a preparation method and application thereof. Background technique [0002] Carbon dioxide (CO 2 The global climate change brought about by the massive emissions of) has attracted great attention from the international community. In many solutions CO 2 In the solution to the problem, the catalytic conversion of CO 2 Fuels and chemicals needed by humans can not only alleviate CO 2 Bringing problems, but also getting useful substances, can be described as killing two birds with one stone, and it is one of the routes of sustainable development. Use solar energy to split water and other renewable energy to electrolyze water to produce hydrogen, and use CO 2 Hydrogenation technology catalyzes the synthesis of fuels and chemicals, which is the most typical catalytic conversion of CO 2 exampl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/06B01J23/08C07C31/04C07C29/153
CPCB01J23/06B01J23/002B01J23/08B01J23/26B01J23/80B01J37/031B01J37/16B01J37/18C07C29/153Y02P20/52C07C31/04
Inventor 李灿王集杰李泽龙汤驰洲卢胜梅李军
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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