Catalyst for preparing methyl alcohol by carbon dioxide catalytic hydrogenation and preparing method thereof

A technology for catalytic hydrogenation and carbon dioxide, applied in the direction of catalyst activation/preparation, preparation of organic compounds, physical/chemical process catalysts, etc., can solve problems such as waste of carbon resources and environmental problems

Inactive Publication Date: 2011-04-06
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The random emission of carbon dioxide gas not only causes serious environmental problems, but also causes serious waste of carbon resources

Method used

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  • Catalyst for preparing methyl alcohol by carbon dioxide catalytic hydrogenation and preparing method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Weigh 4.55gCu(NO 3 ) 2 ·3H 2 O, 10.95gZn(NO 3 ) 2 ·6H 2 O, 3.68gAl(NO 3 ) 3 9H 2 O, 0.64gMg(NO 3 ) 2 ·6H 2 O was dissolved in 100ml ethanol, the solution was recorded as A solution, and 8.91gH was weighed 2 C 2 o 4 ·H 2 O is dissolved in 50ml of ethanol, and the solution is recorded as solution B. At 70°C and stirring, drop liquid B into liquid A for a coprecipitation reaction to obtain a precipitation solution (1). Keep stirring at 70°C until the ethanol is completely evaporated , then dry the obtained catalyst precursor at 110°C for 12 hours, heat up to 350°C at a rate of 3.0°C / min and roast for 4 hours, then cool down to room temperature, grind, tablet, crush, and sieve to obtain particles with a certain particle size , that is, a catalyst for catalytic hydrogenation of carbon dioxide to methanol is obtained.

Embodiment 2

[0019] Weigh 4.55gCu(NO 3 ) 2 ·3H 2 O, 10.95gZn(NO 3 ) 2 ·6H 2 O, 3.68gAl(NO 3 ) 3 9H 2 O, 0.64gMg(NO 3 ) 2 ·6H 2 O was dissolved in 100ml of water, the solution was recorded as liquid A, and 8.91gH was weighed 2 C 2 o 4 ·H 2 O was dissolved in 50ml of water, and the solution was recorded as solution B. Under stirring conditions at 70°C, drop liquid B into liquid A for co-precipitation reaction to obtain a precipitate (1), react at 70°C and stirring conditions for 4 hours, and age 1 hour, then filter and wash the obtained catalyst precursor precipitation, control the pH value of the filtrate between 7 and 8, dry the filter cake at 110°C for 12 hours, and heat up to 350°C at a rate of 3.0°C / min for roasting After 4 hours, cool down to room temperature, grind, tablet, crush, and sieve to obtain particles with a certain particle size, that is, a catalyst for catalytic hydrogenation of carbon dioxide to methanol is obtained.

Embodiment 3

[0021] Weigh 4.55gCu(NO 3 ) 2 ·3H 2 O, 10.95gZn(NO 3 ) 2 ·6H 2 O, 3.68gAl(NO 3 ) 3 9H 2 O, 0.64gMg(NO 3 ) 2 ·6H 2 O was dissolved in 100ml of water, the solution was recorded as solution A, and 8.22gNa was weighed 2 C0 3 Dissolve in 50ml of water, and record the solution as B solution. Drop B solution into A solution for co-precipitation reaction at 70°C and stirring condition to obtain precipitation solution (1), react at 70°C and stirring condition for 4 hours, and age for 1 hour, then the obtained catalyst precursor precipitation was filtered and washed, the pH value of the filtrate was controlled between 7 and 8, the filter cake was dried at 110°C for 12 hours, and the temperature was raised to 350°C at a rate of 3.0°C / min for 4 hours. Hours, down to room temperature, grinding, tableting, crushing, and sieving to obtain particles with a certain particle size, that is, a catalyst for catalytic hydrogenation of carbon dioxide to methanol is obtained.

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Abstract

The invention provides a catalyst for preparing methyl alcohol by carbon dioxide catalytic hydrogenation and a preparing method thereof, belonging to the technical field of catalysts. The catalyst is characterized in that: the catalyst for preparing the methyl alcohol by the carbon dioxide catalytic hydrogenation comprises components in mass ratio of CuO: ZnO: Al2O3: MgO being 3: 6: 1:X (wherein X is in the range of 0.001-0.2) and is prepared by a coprecipitation method. The preparing method comprises the following steps of: (1) dissolving weighed nitrate solutions of copper, zinc, aluminum and magnesium in absolute ethyl alcohol or water, dropping oxalic acid ethanol solution or oxalic acid water solution into the mixed solution, heating, and stirring to obtain the precursor of the catalyst; (2) drying the precursor of the catalyst, roasting for a period of time at certain temperature, cooling and then grinding, tabletting, crushing and sieving the precursor of the catalyst to obtain the catalyst for preparing the methyl alcohol by the carbon dioxide catalytic hydrogenation. Compared with the MgO-free catalyst with the same component mass ratio of CuO to ZnO to Al2O3, the catalyst has better activity, stability and methyl alcohol selectivity; the preparing method is simple, and has low cost and less pollution; and the catalyst is an effective catalyst for preparing the methyl alcohol by the carbon dioxide catalytic hydrogenation.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and relates to a catalyst for methanol production by catalytic hydrogenation of carbon dioxide and a preparation method. Background technique [0002] With the accelerated development of industrialization, especially the rapid development of the petrochemical industry, the "greenhouse effect" and "ozone hole" caused by the excessive emission of carbon dioxide greenhouse gases have increasingly affected the harmonious coexistence between human beings and nature, which has aroused worldwide concern. Wide range of concerns, the 2009 Copenhagen Conference once again focused the world's attention on greenhouse gas emissions. The random discharge of carbon dioxide gas not only causes serious environmental problems, but also causes serious waste of carbon resources. Catalytic hydrogenation of carbon dioxide can generate high value-added chemical products such as methanol, methane, formic acid, dimeth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/80B01J37/03C07C31/04C07C29/154
CPCC07C29/136B01J21/04C07C29/154B01J23/80Y02P20/52
Inventor 张永春张鲁湘
Owner DALIAN UNIV OF TECH
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