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A kind of method of catalytic CO2 synthesis methanol modified cuznzr

A technology for methanol synthesis and modification, applied in chemical instruments and methods, preparation of organic compounds, preparation of hydroxyl compounds, etc., can solve the problem of low catalytic activity of catalysts, achieve high CO2 conversion rate and methanol selectivity, and improve interaction , to promote the effect of dispersion

Active Publication Date: 2015-09-16
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The catalytic activity of the catalyst of the invention is not high

Method used

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  • A kind of method of catalytic CO2 synthesis methanol modified cuznzr

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Embodiment approach 1

[0020] Embodiment 1: The catalytic CO of this example 2 The method of synthetic methanol modified CuZnZr catalyst is:

[0021] (1) Configure Cu(NO 3 ) 2 , Zn(NO 3 ) 2 and Zr(NO 3 ) 4 The mixed solution, the molar ratio of Cu, Zn and Zr in the mixed solution is 0.3:0.5:0.2, and the concentration of Cu, Zn or Zr ions is 0.8mol / L;

[0022] (2) Keeping the temperature of the water bath at 60°C and stirring constantly, mix La 2 o 3 Add in the mixed solution of step (1), wait for La 2 o 3 After complete dissolution, the mixed solution was mixed with Na at a concentration of 0.1mol / L 2 CO 3 Solution parallel flow titration, keep the pH value of the mixed solution at 7 during the titration process, and then use Na 2 CO 3 Adjust the pH value of the mixed solution to 8, stop stirring and aging for 2 hours, and then suction filter 5 times. The filter cake is dried, ground, roasted and granulated in sequence in an air atmosphere to obtain a 20-40 mesh methanol-modified CuZnZr...

Embodiment approach 2

[0023] Embodiment 2: The catalytic CO of this embodiment 2 The method of synthetic methanol modified CuZnZr catalyst is:

[0024] (1) Configure Cu(NO 3 ) 2 , Zn(NO 3 ) 2 and Zr(NO 3 ) 4 The mixed solution, the molar ratio of Cu, Zn and Zr in the mixed solution is 0.3:0.5:0.1, and the concentration of Cu, Zn or Zr ions is 0.1mol / L;

[0025] (2) Keeping the temperature of the water bath at 60-80°C and stirring constantly, mix CeO 2 Add to the mixed solution of step (1) and wait for CeO 2 After complete dissolution, mix the solution with a concentration of 0.8mol / LNa 2 CO 3 Solution co-current titration, keep the pH value of the mixed solution at 7.5 during the titration process, after the titration, then use Na 2 CO 3The solution adjusted the pH value of the mixed solution to 8, stopped stirring and aging for 3 hours, and then suction filtered 6 times. The filter cake was sequentially dried, ground, roasted and granulated in an air atmosphere to obtain a 20-40 mesh me...

Embodiment approach 3

[0026] Embodiment 3: The catalytic CO of this embodiment 2 The method of synthetic methanol modified CuZnZr catalyst is:

[0027] (1) Configure Cu(NO 3 ) 2 , Zn(NO 3 ) 2 and Zr(NO 3 ) 4 The mixed solution, the molar ratio of Cu, Zn and Zr in the mixed solution is 0.45:0.45:1, and the concentration of Cu, Zn or Zr ions is 0.1mol / L;

[0028] (2) Keeping the temperature of the water bath at 80°C and stirring constantly, mix Pr 2 o 3 The agent is added to the mixed solution in step (1), and when Pr 2 o 3 After complete dissolution, mix the solution with a concentration of 1mol / LNa 2 CO 3 Solution co-current titration, keep the pH value of the mixed solution at 7.8 during the titration process, after the titration, then use Na 2 CO 3 The solution adjusted the pH value of the mixed solution to 8, stopped stirring and aging for 2.5 hours, and then suction-filtered 7 times. The filter cake was sequentially dried, ground, roasted and granulated in an air atmosphere to obta...

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Abstract

The invention relates to a preparation method for a catalyst modified CuZnZr used for catalysis of CO2 to synthesize methanol, which belongs to the technical field of resource utilization of blast furnace tail gas. The preparation method comprises the following steps: preparing a mixed solution of Cu(NO3)2, Zn(NO3)2 and Zr(NO3)4; then adding La2O3, CeO2, Pr2O3, Nd2O3 and Sm2O3 as modification auxiliary agents; carrying out titration with a Na2CO3 solution and adjusting the pH value of the mixed solution; and carrying out pumping filtration and subjecting an obtained filter cake to drying, grinding, roasting and granulation in an air atmosphere so as to obtain the 20-mesh to 40-mesh modified CuZnZr catalyst used for synthesis of methanol. Compared with a common prepared catalyst, the catalyst prepared by using the method in the invention has the advantages of uniform dispersion of active components, high catalyst activity and high mechanical strength.

Description

technical field [0001] The invention relates to the technical field of resource utilization of blast furnace tail gas, in particular to a catalytic CO 2 A method for synthesizing methanol-modified CuZnZr catalysts. Background technique [0002] Methanol is the basic raw material of carbon-one chemistry, and is mainly used in the production of organic synthesis intermediates such as formaldehyde, acetic acid, and methyl formate, which are raw materials for the production of medicines, dyes, fragrances, and paints. At the same time, methanol is also a clean fuel, which can be used alone or mixed with gasoline as a vehicle fuel. The output of methanol in the world is second only to synthetic ammonia and ethylene, ranking third. CO 2 The synthesis of methanol by catalytic hydrogenation is one of the chemical fixation methods of carbon dioxide, which has attracted extensive attention of chemists at home and abroad, and has achieved a series of research results. CO 2 Hydrogen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83C07C31/04C07C29/154
CPCY02P20/52
Inventor 高文桂覃志强王华韩冲郭伟张明宇
Owner KUNMING UNIV OF SCI & TECH
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