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High-temperature methanation catalyst, preparation method and application thereof

A methanation catalyst and high temperature technology, applied in the field of high temperature methanation catalyst and its preparation, can solve the problems of deactivation, sintering, carbonization and the like, and achieve the effect of high activity and selectivity

Active Publication Date: 2010-11-24
CHNA ENERGY INVESTMENT CORP LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The impregnation method is used in the preparation process of the above catalysts. The catalysts prepared by these methanation technologies are usually only suitable for operation at lower temperatures and normal pressures, and coking, sintering, and deactivation will occur at higher temperatures; at the same time, these Catalysts are generally only suitable for low CO concentrations

Method used

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  • High-temperature methanation catalyst, preparation method and application thereof
  • High-temperature methanation catalyst, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0145] 31.15g Ni(NO 3 ) 2 ·6H 2 O, 36.79gAl(NO 3 ) 3 9H 2 O, 10.45gZr(NO 3 ) 2 ·5H 2 O, 2.66gLa(NO 3 ) 3 ·6H 2 O was dissolved in 500ml of water, and a 2mol / L sodium carbonate solution was prepared at the same time. The above two solutions were precipitated by co-precipitation method, the precipitation temperature was 70° C., the pH value was 10, and the reaction time was 40 minutes. After the precipitation is completed, age for 1 hour, centrifuge, and wash to obtain a filter cake. In this filter cake, add 80ml water and 22.07gAl (NO 3 ) 3 9H 2 O, and add ammonia water to adjust the pH to 8, remove NO with deionized water 3 - , then disperse the precipitate with water, add HNO 3 Peptization makes n(H + ) / n(Al) is 0.26, let stand for 4h. It is formed by spray drying to less than The particles were then baked at 110°C for 10 hours, and then fired at 400°C for 8 hours. Take the above-mentioned roasted sample, add 3% (mass percentage) starch and 400ml water a...

Embodiment 2

[0147] 15.57g Ni(NO 3 ) 2 ·6H 2 O, 66.23gAl(NO 3 ) 3 9H 2 O, 10.45gZr(NO 3 ) 2 ·5H 2 O, 2.66gLa(NO 3 ) 2 ·6H 2 O was dissolved in 500ml of water, and a 2mol / L sodium carbonate solution was prepared at the same time. The above two solutions were precipitated by co-precipitation method, the precipitation temperature was 70° C., the pH value was 10, and the reaction time was 40 minutes. After the precipitation is completed, age for 1 hour, centrifuge, and wash to obtain a filter cake. In this filter cake, add 80ml water and 22.07gAl (NO 3 ) 3 9H 2 O, and add ammonia water to adjust the pH to 8, remove NO with deionized water 3 - , then disperse the precipitate with water, add HNO 3 Peptization makes n(H + ) / n(Al) is 0.26, let stand for 4h. It is formed by spray drying to less than The particles were then baked at 110°C for 10 hours, and then fired at 400°C for 8 hours. Take a certain amount of the above-mentioned roasted sample, add 3% (mass percentage) star...

Embodiment 3

[0149] 38.93g Ni(NO 3 ) 2 ·6H 2 O, 22.07gAl(NO 3 ) 3 9H 2 O, 10.45gZr(NO 3 ) 2 ·5H 2 O, 2.66gLa(NO 3 ) 2 ·6H 2 O was dissolved in 500ml of water, and a 2mol / L sodium carbonate solution was prepared at the same time. The above two solutions were precipitated by co-precipitation method, the precipitation temperature was 70° C., the pH value was 10, and the reaction time was 40 minutes. After the precipitation is completed, age for 1 hour, centrifuge, and wash to obtain a filter cake. Add 50ml water and 22.07gAl(NO 3 ) 3 9H 2 O, and add ammonia water to adjust the pH to 8, remove NO with deionized water 3 - , then disperse the precipitate with water, add HNO 3 Peptization makes n(H + ) / n(Al) is 0.26, let stand for 4h. It is formed by spray drying to less than The particles were then baked at 110°C for 10 hours, and then fired at 400°C for 8 hours. Take the above-mentioned roasted sample, add 3% (mass percentage) starch and 400ml water and stir evenly, then u...

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Abstract

The invention relates to a high-temperature methanation catalyst, a preparation method and application thereof. The high temperature methanation catalyst comprises the following components: a) NiO serving as an active ingredient; b) a metallic oxide carrier comprising Al2O3 and ZrO2; and c) a metallic oxide auxiliary agent which is at least one of rare-earth metallic oxide RE2O3, and metallic oxide of magnesium Mg, copper Cu and chromium Cr. The method comprises the following steps of: A) preparing an aqueous solution of water soluble salt, wherein the water soluble salt comprises Ni, the metallic oxide carrier and optional metallic cation corresponding to the metallic oxide auxiliary agent, performing precipitation reaction with a precipitator to ensure that the metallic cation in the water soluble salt is precipitated; B) separating solid from liquid to obtain a precipitated solid; and C) performing dry granulating and calcining to ensure that the metallic cation is converted into the corresponding metallic oxide, wherein the calcining comprises high-temperature calcining. The catalyst still has higher activity and selectivity at higher temperature.

Description

technical field [0001] The invention relates to a methanation catalyst, especially a high-temperature methanation catalyst, a preparation method and application thereof. Background technique [0002] Natural gas is a clean, convenient, safe and high-quality energy, the main component of which is methane (CH 4 ). With the acceleration of urbanization and the improvement of people's living standards, people's demand for natural gas is growing rapidly. There is a large gap between the supply and demand of natural gas. [0003] my country's energy endowment is characterized by rich coal, short of oil, and little gas. Coal-to-natural gas technology is an effective way to transform high-carbon energy into low-carbon, hydrogen-rich energy. It is in line with the country's industrial policy of vigorously developing low-carbon energy and has attracted increasing attention from the world's increasingly stringent environmental protection requirements. The coal-to-natural gas proces...

Claims

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Application Information

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IPC IPC(8): B01J23/83B01J23/755B01J23/86B01J37/03C07C9/04C07C1/04C10L3/08
Inventor 李克健蔺华林赵利军
Owner CHNA ENERGY INVESTMENT CORP LTD
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