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Catalyst for producing methane from synthesis gas, preparation method and application thereof

A catalyst and synthesis gas technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of easy sintering, carbon deposition, and deactivation of catalysts, and achieve long catalyst life and methane selectivity Good resistance, anti-coking and long-term effect

Active Publication Date: 2012-02-22
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of easy formation of "hot spots" and easy sintering, carbon deposition and deactivation of the catalyst in the current synthesis gas preparation methane catalyst, and to develop a synthesis gas preparation methane catalyst with high catalytic activity and long service life and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1, weigh 2 grams of nickel nitrate and dissolve in 20 milliliters of dehydrated alcohol, be mixed with 10% nickel nitrate alcohol solution. Then take 3 grams than the surface is 20m 2 / g of silicon carbide powder, disperse the silicon carbide powder in the nickel nitrate alcohol solution at 20°C under stirring conditions, and stir for 3 hours. After drying at 80°C, and then roasting in a muffle furnace at 600°C for 3 hours, a catalyst for preparing methane from synthesis gas with a nickel oxide loading of 8.5% can be obtained. Under the condition of 300 DEG C, the conversion rates of carbon monoxide and hydrogen are respectively 80% and 80%, and the methane selectivity is 82%.

Embodiment 2

[0033] Embodiment 2, get 0.1 gram of cobalt acetate and dissolve in 10 milliliters of distilled water, be mixed with 1% cobalt acetate aqueous solution; Get 0.02 gram of cerium nitrate again, dissolve in 2 milliliters of water, be made into 1% cerium nitrate aqueous solution; One gram of molybdenum nitrate was dissolved in 2 milliliters of distilled water to prepare a 1.5% molybdenum nitrate aqueous solution. Then mix all three. Soak 0.2 g of millet biomass silicon carbide carrier in the above mixed solution, and stir at 40° C. for 6 hours. The pH value of the solution is adjusted to 10 with ammonia water, so that co-precipitation of cobalt, cerium and molybdenum in the solution is deposited on the surface of silicon carbide. The samples were then dried at 100°C. Then put it into a muffle furnace and roast at 700°C for 2 hours to obtain a catalyst for preparing methane from synthesis gas with a loading of cobalt oxide of 12.7%, a loading of cerium oxide of 3.3%, and a loadin...

Embodiment 3

[0034] Embodiment 3, get 0.1 gram of ferric acetate and dissolve in 10 milliliters of distilled water, be mixed with 1% ferric acetate aqueous solution; Get 0.02 gram of cerium acetate again, be dissolved in 2 milliliters of water, be made with 1% cerium nitrate aqueous solution. Then take 0.03 g of ammonium molybdate, dissolve it in 2 ml of distilled water, and prepare 1.5% ammonium molybdate aqueous solution. Take 0.2 gram specific surface as 60m2 / g of silicon carbide powder, disperse the silicon carbide powder in the ferric acetate solution at 60°C under stirring conditions, and stir for 6 hours. The samples were then dried at 100°C. Then add the dried sample into the prepared cerium nitrate solution under stirring condition, and stir for 1 hour. After drying at 100°C, put it into ammonium molybdate solution, stir for 3 hours, dry at 120°C, put it into a muffle furnace and bake at 700°C for 1 hour, you can get iron oxide loading of 12%, cerium oxide loading of 3%, molybd...

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Abstract

A synthetic gas methane catalyst is composed of: 1-20% of iron oxide, 1-30% of cobalt oxide, 1-30% of nickel oxide, 0-10% of rare earth oxide, 0-10% of molybdenum oxide, carbonization Silicon carrier 50-97%. The invention uses the silicon carbide material with stable chemical properties and good thermal conductivity as a catalyst carrier for preparing methane from synthesis gas, and the prepared catalyst has the advantages of high catalytic activity, good methane selectivity, anti-coking and long catalyst life.

Description

technical field [0001] The invention relates to a catalyst and a preparation method thereof, in particular to a catalyst for preparing methane from synthesis gas and a preparation method thereof. Background technique [0002] As a kind of gas energy, natural gas has important applications in power generation, chemical industry and civil use. Compared with coal and oil, natural gas has the advantages of high calorific value, less pollution and environmental friendliness. Therefore, as an important part of the energy structure, natural gas has attracted more and more attention from relevant parties. Especially in recent years, with the continuous improvement of people's requirements for environmental quality, natural gas vehicles with low pollution and environmental friendliness have been promoted and used in some areas. With the increasing promotion of natural gas vehicles, the market share of natural gas vehicles has increased year by year, and the market demand for natura...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/881B01J23/882B01J23/883B01J23/83B01J27/224B01J37/02C07C1/04C07C9/04
Inventor 郭向荣靳国强
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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