Catalyst for preparing low-carbon alcohol through carbon dioxide conversion as well as preparation method and application of catalyst

A carbon dioxide and catalyst technology, which is applied to the catalyst for converting carbon dioxide to prepare low-carbon alcohols and the field of preparation thereof, can solve the problems of low ethanol selectivity, complicated preparation process, high price and the like, and achieve the effects of cost avoidance, simple process and low cost

Active Publication Date: 2022-08-05
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst prepared by this method has the selectivity of ethanol up to 94% in the hydrogenation reaction of carbon dioxide, but the use of gold-based catalysts has disadvantages such as high price
[0007] In summary, the current catalysts for carbon dioxide hydrogenation to ethanol have disadvantages such as low ethanol selectivity, high cost, and complicated preparation process.

Method used

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  • Catalyst for preparing low-carbon alcohol through carbon dioxide conversion as well as preparation method and application of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A preparation method of carbon dioxide conversion to prepare a low-carbon alcohol catalyst, the steps are as follows:

[0030] (1) 0.5g Co, 0.5g Co 3 O 4 and 9g Al 2 O 3 mix, get a mixture;

[0031] (2) the obtained mixture and 250g corundum grinding balls in step (1) are placed in the corundum grinding jar of 500 mL, and nitrogen is introduced into the grinding jar to replace the air; the grinding jar is put into the planetary ball mill for grinding; ball milling is set The conditions are: alternately rotate clockwise and counterclockwise every 1h, the speed is 100r / min, and the ball is milled for 70h; after the ball milling, the mixture is taken out;

[0032] (3) The mixture after ball milling in step (2) is placed in nitrogen at 500° C. for heat treatment for 5 hours; after the heat treatment is completed, the catalyst product is obtained.

[0033] Catalyst performance testing was performed in a slurry bed reactor.

Embodiment 2

[0035] A preparation method of carbon dioxide conversion to prepare a low-carbon alcohol catalyst, the steps are as follows:

[0036] (1) 2g Co, 1g Co(OH) 2 and 7g MoO 3 mix, get a mixture;

[0037] (2) mix the mixture obtained in step (1) and 250g ZrO 2 The grinding ball is placed in a 500mL zirconia grinding jar, and nitrogen is introduced into the grinding jar to replace the air; the grinding jar is put into a planetary ball mill for grinding; the conditions for ball milling are set as follows: clockwise and counterclockwise every 1h The directions are alternately rotated, the speed is 800r / min, and the ball is milled for 24h; after the ball milling, the mixture is taken out;

[0038] (3) The mixture after ball milling in step (2) is placed in argon at 800° C. for heat treatment for 1 hour; after the heat treatment is completed, the catalyst product is obtained.

[0039] Catalyst performance testing was performed in a fixed bed reactor.

Embodiment 3

[0041] A preparation method of carbon dioxide conversion to prepare a low-carbon alcohol catalyst, the steps are as follows:

[0042] (1) 4g Co, 4g CoO and 2g MnO are mixed to obtain mixture;

[0043] (2) in the step (1), the obtained mixture and 250g corundum grinding balls are placed in the nylon grinding tank of 500 mL, and nitrogen is introduced into the grinding tank to replace the air; the grinding tank is put into the drum ball mill and ground; set The conditions of ball milling are: alternately rotate clockwise and counterclockwise every 1h, the rotation speed is 200r / min, and the ball milling is 50h; after the ball milling, the mixture is taken out;

[0044] (3) The mixture after ball milling in step (2) is placed in carbon monoxide at 500° C. for heat treatment for 3 hours; after the heat treatment is completed, a catalyst product is obtained.

[0045] Catalyst performance testing was performed in a slurry bed reactor.

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Abstract

The invention discloses a catalyst for preparing low-carbon alcohol through carbon dioxide conversion and a preparation method and application thereof, and belongs to the technical field of carbon dioxide resource utilization. The preparation method comprises the following steps: carrying out mechanical ball milling on a cobalt simple substance, a cobalt compound and / or a catalyst carrier which are uniformly mixed, and then carrying out heat treatment to obtain a catalyst product after the heat treatment is completed. According to the preparation method of the catalyst for preparing the low-carbon alcohol by converting the carbon dioxide, provided by the invention, the cobalt elementary substance and the oxide or hydroxide of the cobalt are used as raw materials, the interaction between the elementary substance cobalt and a cobalt compound is enhanced under the action of mechanical ball milling, Co0-Cox + double sites are created, and the double sites can catalyze the generation of the alcohol and the growth of a carbon chain; the selectivity of the low-carbon alcohol is greatly promoted, and the selectivity of the low-carbon alcohol is higher than 90%; the preparation method has the characteristics of less waste liquid, low cost, simple process and the like, and has a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of carbon dioxide resource utilization, and in particular relates to a catalyst for preparing low-carbon alcohol by converting carbon dioxide, a preparation method and application thereof. Background technique [0002] In recent years, massive emissions of carbon dioxide have caused global warming and threatened the sustainability of human development. Therefore, reducing the emission of carbon dioxide and reducing the concentration of carbon dioxide in the atmosphere to slow down global warming is of great significance to the sustainable development of mankind. Capturing CO2 and converting it into high value-added fuels and chemicals is a key means of reducing CO2 emissions and reducing CO2 concentrations in the atmosphere. Among them, low-carbon alcohols, such as ethanol, propanol and butanol, are widely used as alternative fuels as well as solvents and raw materials for chemical processes, and have great...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/156C07C31/04C07C31/08B01J23/75B01J23/83B01J23/882B01J23/889B01J37/00B01J37/08
CPCB01J23/8892B01J23/75B01J23/83B01J23/882B01J37/0036B01J37/08C07C29/156C07C31/04C07C31/08Y02P20/52
Inventor 曾丰唐振辰刘水莲付伟杰何一鸣
Owner NANJING UNIV OF TECH
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