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a co x Preparation method of methanation catalyst carrier

A methanation catalyst and catalyst carrier technology, applied in the field of catalysis, can solve the problems of unsuitability for use, poor hydrothermal stability, carbon deposition, etc., and achieve the effects of not easy carbon deposition, good thermal stability, and good thermal stability.

Active Publication Date: 2018-01-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the supports of these catalysts have poor hydrothermal stability and also face the problem of carbon deposition in the methanation reaction, so they are not suitable for use in the methanation reaction of coal-based syngas

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1: (1) Knead 800g of magnesium nitrate and 300g of alumina powder with a certain proportion of water, and dry them after kneading; (2) Add SiO 2 22 grams, CaO33 grams; (3) put the mixture prepared in step 2 into a ball mill and grind it to below 200 mesh; (4) roast the above powdered material at 450 ° C for 2 hours; (5) the powder after the above roasting Add cellulose to the shape material and mix evenly, add water to granulate, and dry the obtained particles; (6) add graphite to the dried particles, mix evenly, and shape;

Embodiment 2

[0016] Example 2: (1) Knead 800g of magnesium nitrate and 300g of alumina powder with a certain proportion of water, and dry after kneading; (2) Add CrO to the drying material 3 11 grams; (3) put the mixture prepared in step 2 into a ball mill and grind it to below 200 mesh; (4) roast the above powdered material at 400°C for 2 hours; (5) in the above roasted powdered material After adding cellulose and mixing evenly, adding water to granulate, and drying the obtained particles; (6) adding graphite to the dried particles, mixing evenly, and molding; 7) drying the tablet, and then roasting to obtain the catalyst carrier II.

Embodiment 3

[0017] Example 3: (1) Knead 130 g of magnesium oxide and 500 g of pseudoboehmite aluminum powder with a certain proportion of water, and dry after kneading; (2) Add CrO to the dried material 3 6.5 g, SiO 2 13 grams, CaO19.5; (3) put the mixture prepared in step 2 into a ball mill and grind it to below 200 mesh; (4) roast the above powdered material at 400 ° C for 2 hours; (5) after the above roasting Add cellulose to the powdery material, mix evenly, add water to granulate, and dry the obtained particles; (6) add graphite to the dried particles, mix evenly, and shape; 7) tablet is dried, and then roasted to obtain the catalyst carrier III.

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PUM

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Abstract

The invention relates to a preparation method for a methanation catalyst carrier with high stability. The preparation method comprises the steps of: 1) simultaneously adding aluminum oxide powder or pseudo-boehmite and magnesium nitrate into a small amount of water to be stirred, and after uniformly mixing the mixture, drying the mixture; 2) adding one or more of CrO3, SiO2 and CaO into the dried material; 3) putting the mixed material in a ball mill to be ground to be less than 200 meshes; 4) roasting the powdery material; 5) adding cellulose into the roasted powdery material to be uniformly mixed, adding water to granulate the mixture to obtain particles, and drying the particles; 6) adding graphite into the dried particles to be uniformly mixed and performing moulding; and 7) drying the tablets, and then roasting the tablets to obtain the catalyst carrier. The catalyst carrier prepared by the method has good thermal stability. A methanation catalyst prepared by using the carrier has the characteristics of being good in heat-resistant stability, wide in applicable temperature range, hard to deposit carbon with a high CO content and the like.

Description

technical field [0001] The invention belongs to the technical field of catalysis, and relates to a preparation method of a highly stable methanation catalyst carrier. In particular, it relates to a method for preparing a high-stable COx methanation catalyst carrier by using a hydrothermal synthesis method. The carrier can be used to prepare the catalyst by an impregnation method, and is particularly suitable as a carrier of the COx methanation catalyst. Background technique [0002] With the development of economy and society, the demand for natural gas is growing rapidly, and it will become the energy with the fastest growing consumption in the 21st century. my country's natural gas supply capacity is relatively lagging behind, leading to prominent contradictions between natural gas supply and demand. The contradiction between supply and demand of natural gas, in addition to fully exploiting domestic natural gas resources based on existing domestic resources, we must also ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/26C07C9/04C07C1/04C07C1/12
Inventor 吴学其朱艳芳吴琳蔡进张杰黄先亮徐本刚蔡成伟魏士新
Owner CHINA PETROLEUM & CHEM CORP
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