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High temperature methanation catalyst and its preparation method and application

A methanation catalyst, catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, hydrocarbon production from carbon oxides, etc., can solve the problems of inappropriate process, short life, complex catalyst composition, etc. Excellent catalytic performance, good activity effect

Inactive Publication Date: 2013-01-02
孙德标
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Chinese patent CN 101703933 discloses a method for preparing a methanation catalyst, but it mainly removes trace amounts of carbon monoxide in a hydrogen-rich atmosphere, and is not suitable for the process of producing high calorific value gas
Chinese patent CN 101733104A discloses a method for preparing a synthesis gas methanation catalyst in an atmosphere containing carbon dioxide, but these catalyst preparation techniques are only applicable at lower temperatures and pressures; Chinese patent CN101733104 introduces a method for preparing a high-temperature methanation catalyst , but its catalyst composition is complex and its thermal stability is not enough
[0006] To sum up, my country currently needs a technology and catalyst for converting coal gas into natural gas for urban use, but some of the existing catalysts are not specially designed for this purpose, so there are many problems. Due to the complex composition and preparation method and short lifespan, it is urgent to develop a catalyst with excellent catalytic properties.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Catalyst A was prepared in the following steps:

[0039] (1) prepare nickel solution: take by weighing 300kg nickel nitrate hexahydrate, use deionized water as solvent, be made into the aqueous solution of 1 mol / liter nickel nitrate;

[0040] (2) Preparation of silica sol solution: Weigh 100kg of silica sol (the silica sol is produced by An Xunneng Catalyst Company, the brand is XNG-1), and use water as a solvent to make a 3 mol / liter silica sol liquid to obtain silica sol liquid;

[0041] (3) prepare magnesium solution: take by weighing 210.5kg magnesium nitrate hexahydrate, use deionized water as solvent, be made into the aqueous solution of 1 mol / liter magnesium nitrate;

[0042] (4) prepare sodium carbonate solution: take by weighing 160kg sodium carbonate, use deionized water as solvent, be made into the aqueous solution of 1 mol / liter sodium carbonate;

[0043] (5) Synthesis: first put the silica sol solution into the reaction kettle, then add the magnesium solu...

Embodiment 2

[0047] Catalyst B was prepared in the following steps:

[0048] (1) prepare nickel solution: take by weighing 300kg nickel nitrate hexahydrate and 6.8kg chromic acid respectively, use deionized water to make solvent, be made into the aqueous solution of nickel nitrate and chromic acid that total molar concentration is 1.2 mol / liter;

[0049] (2) Preparation of silica sol solution: Weigh 50kg of silica sol (the silica sol is produced by An Xunneng Catalyst Company, the brand is XNG-1), and weigh 60kg of aluminum sol (the aluminum sol is produced by Shandong Aluminum Factory, the brand is P-DF -03-LS), using water as a solvent to prepare a mixed liquid of silica sol and aluminum sol with a total concentration of 4.2 mol / liter to obtain a silica sol solution;

[0050] (3) prepare magnesium solution: take by weighing 210.5kg magnesium nitrate hexahydrate, use deionized water as solvent, be made into the aqueous solution of 1.1 mol / liter magnesium nitrate;

[0051] (4) prepare sod...

Embodiment 3

[0056] Catalyst C was prepared in the following steps:

[0057] (1) prepare nickel solution: take by weighing 300kg nickel nitrate hexahydrate and 5kg chromic acid respectively, use deionized water as solvent, be made into the aqueous solution of nickel nitrate and chromic acid that total molar concentration is 1.2 mol / liter;

[0058] (2) Preparation of silica sol solution: Weigh 80kg of silica sol (the silica sol is produced by Anxuneng Catalyst Company, the brand is XNG-1), and weigh 30kg of aluminum sol (the aluminum sol is produced by Shandong Aluminum Plant, the brand is P-DF -03-LS), using water as a solvent to prepare a mixed liquid of silica sol and aluminum sol with a total concentration of 4.2 mol / liter to obtain a silica sol solution;

[0059] (3) prepare magnesium solution: take by weighing 168kg magnesium nitrate hexahydrate, use deionized water as solvent, be made into the aqueous solution of 1.1 mol / liter magnesium nitrate;

[0060] (4) prepare sodium carbonate...

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PUM

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Abstract

The inventive high temperature methanation catalyst belongs to the technical field of hydrogenation. The invention provides a catalyst with good catalytic performance, in order to overcome the problems of complex composition and preparation method and shorter life of the prior methanation catalyst. The catalyst mainly includes NiO 45%-75%, Cr2O3 0%-10%, and MgO modified carrier 25%-55%. The invention simultaneously provides a method for preparing the catalyst by precipitation method and the application of the catalyst. The catalyst has good activity and stability, and can be used in the application for converting coal-based synthetic gas into urban fuel gas and natural gas.

Description

technical field [0001] The invention relates to a catalyst for converting carbon monoxide into methane, more specifically, the invention relates to a high-temperature methanation catalyst for converting coal gas into natural gas and its preparation. Background technique [0002] Natural gas is a clean, convenient, safe and high-quality energy, the main component is methane. With the acceleration of urbanization and the improvement of people's living standards, people's demand for natural gas is growing rapidly, and there is a large gap between the supply and demand of natural gas. [0003] With the continuous growth of the world economy, the contradiction between the supply and demand of oil and natural gas has become more prominent, and the price has continued to be high. The eyes of the world are all on the development of alternative energy sources such as oil and natural gas, and carbon-containing resources such as coal and biomass are routed through synthetic gas. Oil pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/86B01J35/10C07C9/04C07C1/04C07C1/12
Inventor 孙德标唐新宇施鸿伟
Owner 孙德标
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