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Methanation catalyst for synthesizing substitute natural gas and preparation method thereof

A methanation catalyst, a technology for replacing natural gas, applied in physical/chemical process catalysts, catalyst carriers, chemical instruments and methods, etc., can solve the problems of low volume space velocity, low use space velocity, and no research on methanation catalysts.

Active Publication Date: 2013-07-10
XIAN ORIGIN CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Both CN101733104A and CN101716513A disclose a carbon dioxide methanation catalyst and its preparation method, but the space velocity is low, not exceeding 10000h -1
CN101391218A discloses a coke oven gas methanation catalyst and its preparation method. The catalyst is prepared by using magnesium-aluminum spinel as a composite carrier, and then impregnated with nickel nitrate and dried and roasted. According to its 400°C life test and disclosed content, the catalyst may It is only applicable to the circulating adiabatic methanation process, and the process gas needs to be circulated to reduce CO and CO in the raw gas 2 concentration, while its volumetric space velocity is low
At present, in China, it can be applied to processes such as adiabatic non-circulation and adiabatic circulation, and there is no research on high-temperature-resistant methanation catalysts.

Method used

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  • Methanation catalyst for synthesizing substitute natural gas and preparation method thereof
  • Methanation catalyst for synthesizing substitute natural gas and preparation method thereof
  • Methanation catalyst for synthesizing substitute natural gas and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0127] Embodiment 1: the preparation of methanation catalyst

[0128] The implementation steps of this embodiment are as follows:

[0129] A. Catalyst carrier preparation

[0130] Al(NO 3 ) 3 9H 2 O and Mg(NO 3 ) 2 ·6H 2 O is added with water to prepare a solution with a total equivalent concentration of metal ions of 0.1 mol / L, in which Al(NO 3 ) 3 9H 2 O and Mg(NO 3 ) 2 ·6H 2 The weight ratio of O is 40:12.7, then add 1% sodium dodecylbenzenesulfonate oxygen-containing organic matter based on the total weight of the aluminum nitrate hydrate and magnesium nitrate hydrate, stir evenly, and heat the mixture to temperature 30°C, then add 0.1N Na 2 CO 3 Precipitating agent, so that the pH at the end point reaches 7.0, the generated precipitate is washed with water, and the washed precipitate is then dried at a temperature of 80°C for 6 hours, and then roasted at a temperature of 400°C for 3 hours, and the roasted precipitate is cooled after cooling. Pulverize, take 1...

Embodiment 2

[0140] Embodiment 2: the preparation of methanation catalyst

[0141] The implementation steps of this embodiment are as follows:

[0142] A. Catalyst carrier preparation

[0143] Al(NO 3 ) 3 9H 2 O and Mg(NO 3 ) 2 ·6H 2 O is added with water to prepare a solution with a total equivalent concentration of metal ions of 0.2 mol / L, in which Al(NO 3 ) 3 9H 2 O and Mg(NO 3 ) 2 ·6H 2 The weight ratio of O is 32:9, then add 2.5% sodium dodecylbenzenesulfonate oxygen-containing organic matter based on the total weight of the aluminum nitrate hydrate and magnesium nitrate hydrate, stir well, and heat the mixture to the temperature 35°C, then add 0.3N Na 2 CO 3 Precipitating agent, so that the pH at the end point reaches 7.0, the generated precipitate is washed with water, the washed precipitate is then dried at a temperature of 85°C for 6.5 hours, and then roasted at a temperature of 500°C for 3.5 hours, and the roasted precipitate is cooled after cooling. Pulverize, tak...

Embodiment 3

[0153] Embodiment 3: the preparation of methanation catalyst

[0154] The implementation steps of this embodiment are as follows:

[0155] A. Catalyst carrier preparation

[0156] Al(NO 3 ) 3 9H 2 O and Mg(NO 3 ) 2 ·6H 2 O is added with water to prepare a solution with a total equivalent concentration of metal ions of 0.5 mol / L, in which Al(NO 3 ) 3 9H 2 O and Mg(NO 3 ) 2 ·6H 2 The weight ratio of O is 34:7.5, then add 4% cellulose oxygen-containing organic matter based on the total weight of the aluminum nitrate hydrate and magnesium nitrate hydrate, stir evenly, heat the mixture to a temperature of 90°C, and then add 0.8 N NaOH precipitating agent, so that the pH at the end point reaches 9.5, and the generated precipitate is washed with water. The washed precipitate is then dried at a temperature of 120°C for 12 hours, and then roasted at a temperature of 900°C for 6 hours. After cooling, the roasted precipitate The material is pulverized, and the 120-140 mesh p...

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Abstract

The invention relates to a methanation catalyst for synthesizing substitute natural gas and a preparation method thereof. The methanation catalyst comprises Al2o3, MgO, NiO, La2O3, TiO2, CeO2 or ZrO2 and the mixture thereof. Compared with the existing methanation catalyst, the methanation catalyst prepared by using the method disclosed by the invention has high conversion ratio, great space velocity, high activity and good thermostability, so that the methanation catalyst and the preparation method thereof are suitable for the adiabatic non-circulation process and the adiabatic cycle process for synthesizing the substitute natural gas through the tail gas in hydrocarbon industries.

Description

【Technical field】 [0001] The invention belongs to the technical field of synthesizing substituted natural gas from tail gas of hydrocarbon industry. More specifically, the present invention relates to a methanation catalyst for synthesizing substitute natural gas, and also relates to a preparation method of the methanation catalyst. 【Background technique】 [0002] my country's coking, calcium carbide, blue carbon, steelmaking and other industries are developed, and a large amount of industrial tail gas is produced as a by-product. These industrial tail gases rich in carbon and hydrogen cannot be effectively used, which not only causes waste of resources, but also pollutes the environment. If these hydrocarbon industrial tail gases are used as raw materials to synthesize substitute natural gas, it will not only turn waste into treasure, but also save energy and reduce emissions, which will have high economic and social benefits. [0003] At present, most of the traditional m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B01J32/00B01J21/10C10L3/08
Inventor 周晓奇李军吴志涛吴鹏高维恒宋娥媚黄彦琦高超
Owner XIAN ORIGIN CHEM TECH
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