Preparation method of catalyst for carbon dioxide hydrogenation methyl alcohol production

A carbon dioxide and catalyst technology, which is applied in the field of preparation of catalysts for hydrogenation of carbon dioxide to methanol, can solve the problem that the generation of high active sites cannot be promoted in a targeted manner, the specific surface of the carrier is difficult to fully utilize, and the loading of active components is difficult, etc. problem, to achieve the effect of improved reusability, easy recovery, and simple preparation method

Inactive Publication Date: 2019-05-21
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the various processes of the preparation method of the prior art, it is difficult to adjust and control the loading of the active components, and it is difficult to achieve high dispersion of the loading of the active components on the carrier. The a

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Preparation method, operating conditions, performance index and catalytic effect of the catalyst for carbon dioxide hydrogenation to methanol:

[0027] 1. Preparation of catalyst:

[0028] (1) Weigh 4g of polyethylene glycol-polypropylene glycol-polyethylene glycol triblock polymer (P123) into a 250mL beaker, add 100mL of deionized water, and stir at room temperature until P123 is completely dissolved to obtain a transparent solution;

[0029] (2) add the concentrated hydrochloric acid 8g of mass fraction 37% to above-mentioned solution, Cu(NO 3 ) 2 and Zn(NO 3 ) 2 The solid powders are 0.94g and 1.89g respectively, heated in a water bath to 40°C, and stirred at 600rpm for 60 minutes;

[0030] (3) drop 8g tetraethyl orthosilicate (TEOS) into the above-mentioned stirring solution to obtain the precursor system of mesoporous silica loaded metal active component catalyst;

[0031] (4) After sealing the above solution and continuing to stir vigorously for 24 hours, the...

Embodiment 2

[0038] Preparation method, operating conditions, performance index and catalytic effect of the catalyst for carbon dioxide hydrogenation to methanol:

[0039] 1. Preparation of catalyst:

[0040] (1) Weigh 6g of polyethylene glycol-polypropylene glycol-polyethylene glycol triblock polymer (P123) into a 250mL beaker, add 150mL of deionized water, and stir at room temperature until P123 is completely dissolved to obtain a transparent solution;

[0041](2) Add 12.6g of concentrated hydrochloric acid of mass fraction 37% to above-mentioned solution, Cu(NO 3 ) 2 and Zn(NO 3 ) 2 The solid powders were 1.88g and 3.78g respectively, heated in a water bath to 40°C, and stirred at 650rpm for 60 minutes;

[0042] (3) 12.5g tetraethyl orthosilicate (TEOS) was dropped into the above-mentioned stirring solution to obtain a precursor system of mesoporous silica loaded metal active component catalyst;

[0043] (4) After sealing the above solution and continuing to stir vigorously for 24 ...

Embodiment 3

[0050] Preparation method, operating conditions, performance index and catalytic effect of the catalyst for carbon dioxide hydrogenation to methanol:

[0051] 1. Preparation of catalyst:

[0052] (1) Weigh 8g of polyethylene glycol-polypropylene glycol-polyethylene glycol triblock polymer (P123) into a 250mL beaker, add 200mL of deionized water, and stir at room temperature until P123 is completely dissolved to obtain a transparent solution;

[0053] (2) add the concentrated hydrochloric acid 17g of massfraction 37% to above-mentioned solution, Cu(NO 3 ) 2 and Zn(NO 3 ) 2 The solid powders were 3.76g and 1.89g respectively, heated in a water bath to 60°C, and stirred at 700rpm for 60 minutes;

[0054] (3) drop 16.8g tetraethyl orthosilicate (TEOS) into the above-mentioned stirring solution to obtain the precursor system of mesoporous silica loaded metal active component catalyst;

[0055] (4) After sealing the above solution and continuing to stir vigorously for 24 hours,...

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Abstract

The invention discloses a preparation method of a catalyst for carbon dioxide hydrogenation methyl alcohol production. The catalyst prepared through the method can sufficiently utilize the high specific surface area and the unique duct structure of mesoporous silicon dioxide, ultrahigh dispersion of active components is achieved, and generation of high-activity loci is promoted. The method comprises the following steps that 1, a polymer is weighed to be added into deionized water, stirring is performed to achieve complete dissolution; 2, concentrated hydrochloric acid, Cu(NO3)2 and Zn(NO3)2 solid powder are added, and heating and stirring are performed; 3, a silicon source is dropped in, and a precursor system solution is obtained; 4, sealing is performed for continuous stirring for 24-28h or longer, and the reaction solution is poured into a self-pressure reaction kettle for crystallization; 5, the crystallized solution is subjected to washing and suction filtering, and obtained filter cakes are dried; 6, the dried product is calcinated; 7, the calcinated product is placed into a tube furnace to be reduced in hydrogen airflow, and the catalyst for carbon dioxide hydrogenation methyl alcohol production is obtained.

Description

technical field [0001] The invention relates to a method for preparing a catalyst, in particular to a method for preparing a catalyst for hydrogenation of carbon dioxide to methanol. Background technique [0002] Methanol is an important chemical intermediate and an ideal liquid fuel additive. It is in great demand in industry. The process of carbon dioxide hydrogenation to methanol is one of the important sources of industrial methanol, and it can greatly increase the concentration of carbon atoms. utilization rate. For the hydrogenation of carbon dioxide to methanol process, the copper-zinc-based catalysts commonly used in industry are copper-zinc oxide bimetallic catalysts supported on alumina. The main preparation methods include sol-gel method, impregnation method and co-precipitation method. (1) The sol-gel method uses Na 2 CO 3 with Cu(NO 3 ) 2 , Zn(NO 3 ) 2 The prepared mixed solution reacts to form a transparent sol system, and then the obtained gel is dried,...

Claims

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Application Information

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IPC IPC(8): B01J23/80B01J37/08B01J37/10B01J37/18B01J35/10C07C29/154C07C31/04
CPCY02P20/52
Inventor 亓士超朱蓉蓉喻国兴周睿孙林兵刘晓勤
Owner NANJING UNIV OF TECH
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