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Nickel-based supported catalyst and method for preparing methanol through plasma catalysis CO2 hydrogenation by using nickel-based supported catalyst

A supported catalyst and plasma technology, which is applied in molecular sieve catalysts, chemical instruments and methods, preparation of hydroxyl compounds, etc., can solve the problems of few reports, and achieve the effect of simple process and green method

Active Publication Date: 2019-03-29
DALIAN MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] There are very few reports on plasma or plasma-catalyzed hydrogenation of carbon dioxide to methanol in published literature

Method used

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  • Nickel-based supported catalyst and method for preparing methanol through plasma catalysis CO2 hydrogenation by using nickel-based supported catalyst
  • Nickel-based supported catalyst and method for preparing methanol through plasma catalysis CO2 hydrogenation by using nickel-based supported catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] A plasma-catalyzed CO 2 Hydrogenation to methanol method, using low-temperature plasma and nickel-based supported catalyst to activate carbon dioxide and hydrogen to selectively generate methanol;

[0055] The reactor consists of a glass cylinder with an outer diameter of 10 mm and an inner diameter of 8 mm. A stainless steel rod with a diameter of 2 mm is arranged on the axis of the glass cylinder as a central electrode. The temperature between the stainless steel rod and the inner wall of the glass cylinder is low temperature. In the plasma region, a jacket is provided on the outer wall of the side of the glass cylinder, and a circulating sodium chloride solution is passed through the jacket as a ground electrode and a condensate;

[0056] NiO x / TiO 2 The catalyst is filled in the low temperature plasma area, in which: NiO x x in is 0.1<x<1;

[0057] The synthesis conditions are: the circulating sodium chloride solution controls the reaction temperature to 30°C, ...

Embodiment 2

[0061] The difference with Example 1 is: NiO x / fumed SiO 2 The catalyst is filled in the low temperature plasma area, in which: NiO x x in is 0.1<x<1.

[0062] The above NiO x / fumed SiO 2 The preparation method of the catalyst is: fumed SiO after roasting 2 Mix the carrier with the excess nickel-based solution, drip the urea solution at a rate of 40 drops per minute at 60°C and stir, separate to obtain a precipitate, first vacuum freeze-dry, then oven dry overnight, then mechanically shape and place in He- h 2 (H 2 Accounting for the volume percentage of the mixed gas is 5%) in the plasma mixed gas at 350 ° C for 2 hours to obtain NiO x / fumed SiO 2 catalyst.

Embodiment 3

[0064] The difference with Example 1 is: NiO x / Al 2 o 3 The catalyst is filled in the low temperature plasma area, in which: NiO x x in is 0.1<x<1.

[0065] The above NiO x / Al 2 o 3 The preparation method of the catalyst is: Al 2 o 3 Mix the carrier with the excess nickel-based solution, drip the urea solution at a rate of 40 drops per minute at 60°C and stir, separate to obtain a precipitate, first vacuum freeze-dry, then oven dry overnight, then mechanically shape and place in He- h 2 (H 2 Accounting for the volume percentage of the mixed gas is 5%) in the plasma mixed gas at 350 ° C for 2 hours to obtain NiO x / Al 2 o 3 catalyst.

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Abstract

The invention relates to a nickel-based supported catalyst and a method for preparing methanol through plasma catalysis CO2 hydrogenation by using the nickel-based supported catalyst, and belongs to the fields of CO2 emission reduction, CO2 resource utilization and plasma catalysis chemical synthesis. The synergistic effect of low-temperature plasmas and the nickel-based supported catalyst is usedfor activating CO2 and hydrogen gas to selectively generate the methanol. The invention provides the catalyst; under a plasma condition, a NiOx-based (x is greater than 0 but is smaller than 1) catalyst has relatively high methanol selectivity; particularly, NiOx is loaded on a TiO2 carrier; the methanol selectivity approaches to 80 percent; a copper-based catalyst is an optimal common catalyst for catalysis of methanol preparation through CO2 hydrogenation.

Description

technical field [0001] The invention relates to a nickel-based supported catalyst and the use of its plasma to catalyze CO 2 The method for producing methanol through hydrogenation belongs to the fields of carbon dioxide emission reduction, carbon dioxide resource utilization and plasma catalytic chemical synthesis. Background technique [0002] Carbon dioxide is one of the main greenhouse gases in the earth's atmosphere, causing climate deterioration and harming the environment. With the continuous development of human society, the use of fossil fuels has increased dramatically, resulting in an increasing amount of carbon dioxide in the atmosphere. At present, there are two main ways to deal with carbon dioxide, one is to capture and store it underground, and the other is to directly transform and utilize it. Due to CO 2 In addition to being a greenhouse gas, it is also a potential "carbon resource", so the direct conversion and utilization method can convert CO 2 "Turn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J29/46C07C29/156C07C31/04
CPCB01J23/002B01J23/755B01J29/46C07C29/156C07C31/04Y02P20/52
Inventor 王丽朱益民朱斌杜晓敏
Owner DALIAN MARITIME UNIVERSITY
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