Preparation method of synthetic gas methanation catalyst

A technology of catalysts and additives, which is applied in the field of synthesis gas methanation catalyst preparation, can solve the problems of easy sintering stability of active components, difficulty in controlling the dispersion of catalyst particles, etc., and achieve good catalyst dispersion, mild conditions, and pore structure adjustable effect

Inactive Publication Date: 2012-08-08
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a kind of preparation method that is used for syngas methanation catalyst, to solve the problem that the active components of existing catalysts are easy to sinter and have low stability at high temperature. Low, and the problem that the dispersion of catalyst particles is difficult to control

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  • Preparation method of synthetic gas methanation catalyst

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Effect test

specific Embodiment approach 1

[0019] Weigh 1.5 g of F127 and dissolve it in ethanol. After fully dissolving, add 2 g of aluminum isopropoxide, continue to stir for 2 h, weigh 0.3 g of nickel nitrate and add it to the above solution, 40 o After stirring at C constant temperature for 4 h, place in a drying oven at 60°C for constant temperature drying for 48 h, and after 400 o C was calcined for 4h to obtain a nickel catalyst with a loading weight percentage of 10%. The specific surface area of ​​the catalyst synthesized in this embodiment is 239 m 2 / g, pore volume 0.26 cm 3 / g, with an average pore size of 8 nm.

specific Embodiment approach 2

[0020] Weigh 1 g of F127 and dissolve it in ethanol. After fully dissolving, add 2 g of aluminum isopropoxide, continue to stir for 2 h, weigh 0.3 g of nickel nitrate and add it to the above solution, 40 o C was stirred at a constant temperature for 4 h, placed in a drying oven at 60°C for 48 h at a constant temperature, and after 500 o C was calcined for 4h to obtain a nickel catalyst with a loading weight percentage of 10%. The specific surface area of ​​the catalyst is 324 m 2 / g, pore volume 0. 37 cm 3 / g, with an average pore size of 6 nm.

specific Embodiment approach 3

[0021] Weigh 1 g of F127 and dissolve it in ethanol. After fully dissolving, add 2 g of aluminum nitrate, continue to stir for 2 h, weigh 0.3 g of nickel nitrate and add it to the above solution, 40 o After stirring at C constant temperature for 4 h, place it in a drying oven at 60°C for 48 h at constant temperature, and after 500 o C was calcined for 4h to obtain a nickel catalyst with a loading weight percentage of 10%. The specific surface area of ​​the catalyst is 254 m 2 / g, pore volume 0. 34 cm 3 / g, with an average pore diameter of 3.5 nm.

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Abstract

The invention discloses a preparation method of a synthetic gas methanation catalyst. The preparation method is characterized in that a polyoxyethylene-polyoxypropylene-polyoxyethylene triblock copolymer, one or more aluminum sources, nickel nitrate and one or more auxiliaries as raw materials undergo a one-step synthesis reaction according to a certain ratio by a solvothermal method to produce a desired product. The preparation method has simple processes. The synthetic gas methanation catalyst obtained by the preparation method has a mesoporous structure and controllable aperture sizes and catalyst particle dispersity, can show good sintering resistance, high activity at a low temperature, stability at a high temperature and high methane selectivity in methanation, and has important application values in synthesis of substitute natural gas and solution of the existing natural gas shortage problem.

Description

technical field [0001] The present invention relates to a method for preparing a synthetic gas methanation catalyst, specifically a method for synthesizing a methanation catalyst supported by a porous material in one step using a tri-block copolymer as a template, and using an aluminum source, nickel nitrate and a metal salt as raw materials. It can be used to directly synthesize substitute natural gas from coal-based synthesis gas. Background technique [0002] The core technology of coal-to-natural gas technology is methanation catalyst. The methanation reaction is a strong exothermic reaction under the action of a catalyst, and the methanation catalyst must maintain stable performance at high temperature and have high activity at low temperature. At present, most methanation catalysts use nickel-based catalysts, and the carrier is usually Al. 2 o 3 , The representative methanation catalysts (US3988262 and US398826) use nickel and alumina catalyst system. Industrial...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J23/83B01J35/10C07C9/04C07C1/04C07C1/12C10L3/08
Inventor 杜建平李瑞丰王光彪荆宏健刘金亮白亚东王琰马静红
Owner TAIYUAN UNIV OF TECH
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