A kind of co-ce-cu catalyst, preparation method and application in carbon dioxide methanation reaction

A co-ce-cu, 1.co-ce-cu technology, applied in the field of catalysts, can solve problems such as low CO by-products, and achieve the effect of improving reaction activity, deposition and loading

Active Publication Date: 2019-04-26
石首金源催化剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a new type of composite catalyst for the problem of the generation of more by-product CO in the process of carbon dioxide methanation reaction, mainly adopting Co, Ce, Cu as active components, through precipitation reaction, roasting After preparation, it can achieve the effect of low CO by-product

Method used

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  • A kind of co-ce-cu catalyst, preparation method and application in carbon dioxide methanation reaction

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The preparation method of Co-Ce-Cu catalyst comprises the steps:

[0024] Step 1, in parts by weight, mix 30 parts of sodium silicate, 3 parts of sodium sulfate, and 400 parts of water evenly, after heating up to 70°C, add 5wt% acetic acid aqueous solution dropwise to make the pH between 9, After letting it cool, carry out the first aging for 2 hours; then add 5wt% acetic acid aqueous solution dropwise to keep the pH at 4, then carry out the second aging for 3 hours, then add 30 parts of hydroxy silicone oil, stir evenly, and carry out the third aging After 5 h, the sol containing the modified nano-silica carrier was obtained;

[0025] In the second step, in the sol obtained in the first step, add 10 parts of cobalt nitrate, 4 parts of cerium chloride and 5 parts of copper nitrate, mix well, and slowly add NH 4 OH aqueous solution and (NH 4 ) 2 CO 3 For the mixed solution of aqueous solution, adjust the pH value of the solution to 9, slowly add it dropwise and heat ...

Embodiment 2

[0029] The preparation method of Co-Ce-Cu catalyst comprises the steps:

[0030] Step 1, in parts by weight, mix 40 parts of sodium silicate, 5 parts of sodium sulfate, and 500 parts of water evenly, after heating up to 90°C, add 10wt% acetic acid aqueous solution dropwise to make the pH between 10, After letting it cool, carry out the first aging for 4 hours; then add 10wt% acetic acid aqueous solution dropwise to make the pH at 5, then carry out the second aging for 5 hours, then add 35 parts of hydroxyl silicone oil, stir evenly, and carry out the third aging After 15 h, the sol containing the modified nano-silica carrier was obtained;

[0031] In the second step, in the sol obtained in the first step, add 12 parts of cobalt nitrate, 6 parts of cerium chloride and 8 parts of copper nitrate, mix well, and slowly add NH 4 OH aqueous solution and (NH 4 ) 2 CO 3 For the mixed solution of aqueous solution, adjust the pH value of the solution to 10, slowly add it dropwise and...

Embodiment 3

[0035] The preparation method of Co-Ce-Cu catalyst comprises the steps:

[0036] Step 1, in parts by weight, mix 35 parts of sodium silicate, 4 parts of sodium sulfate, and 450 parts of water evenly, after heating up to 75°C, add 7wt% acetic acid aqueous solution dropwise to make the pH between 9, After letting it cool, carry out the first aging for 3 hours; then add 7wt% acetic acid aqueous solution dropwise to make the pH at 4, then carry out the second aging for 4 hours, then add 32 parts of hydroxyl silicone oil, stir evenly, and carry out the third aging After 12 h, the sol containing the modified nano-silica carrier was obtained;

[0037] In the second step, in the sol obtained in the first step, add 11 parts of cobalt nitrate, 5 parts of cerium chloride and 6 parts of copper nitrate, mix well, and slowly add NH 4 OH aqueous solution and (NH 4 ) 2 CO 3For the mixed solution of aqueous solution, adjust the pH value of the solution to 9, slowly add it dropwise and heat...

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Abstract

The invention relates to a Co-Ce-Cu catalyst, a preparation method and an application thereof in a methanation reaction of carbon dioxide, belonging to the technical field of catalyst. The catalyst contains Co, Ce and Cu, the carrier is nano-silica. The invention provides a novel composite catalyst aiming to the problem that more by-products CO are generated in the methanation reaction of carbon dioxide. Co, Ce, Cu are used as the active ingredients. After Ce reacts with other active ingredients, the amount of CO produced by the reaction can be remarkably reduced. In addition, the catalyst takes nano-silica as a carrier, and the carrier is modified during generation by utilizing hydroxyl silicone oil. The reaction force of the catalyst with the polar solvent and particles can be improved. The generated catalyst carrier exhibits a good hollow structure, which improves the deposition and loading amount of the active components of the catalyst and improves the reaction activity.

Description

technical field [0001] The invention relates to a Co-Ce-Cu catalyst, a preparation method and an application in a carbon dioxide methanation reaction, belonging to the technical field of catalysts. Background technique [0002] CO 2 The methanation reaction was proposed by French chemist Paul Sabatier. Therefore, the reaction is also called the Sabatier reaction. The reaction process is to mix CO in a certain proportion. 2 and H 2 The gas passes through a reactor equipped with a catalyst, and under certain temperature and pressure conditions, CO 2 and H 2 A reaction occurs to form water and methane. The chemical reaction equation is as follows: [0003] CO 2 +4H 2 =CH 4 +2H 2 o [0004] Carbon dioxide hydromethanation has attracted much attention due to its clear application prospects. Current research is mainly focused on the development of catalysts. For the metal active components, a large number of studies have shown that most Group VIII metal catalysts are e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83C07C1/12C07C9/04B01J32/00B01J31/06
CPCB01J23/83B01J31/069C07C1/12C07C2523/83C07C2531/06C07C9/04
Inventor 段清
Owner 石首金源催化剂有限公司
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