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Method for preparing high-stability methanation catalyst carrier

A methanation catalyst, high stability technology, applied in the field of catalysis, can solve the problems of unsuitable use, poor hydrothermal stability, etc., and achieve the effect of not easy to deposit carbon, good heat resistance stability, and good hydrothermal stability

Active Publication Date: 2016-07-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the carriers of these catalysts have poor hydrothermal stability and are not suitable for use in coal-based syngas methanation reactions.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: (1) Add 800g of magnesium nitrate and 300g of alumina powder to a certain proportion of water and mix; (2) Under stirring, add 60g of ethylene glycol to the mixture formed in step 1; (3) add step 2 The prepared mixture was put into an autoclave, and hydrothermally treated at 200°C and 6.0MPa for 3h; (4) The materials in the autoclave were taken out, washed, filtered and dried; (5) 700°C roasted for 3h; (6) Add 3% methyl cellulose for granulation; (7) compress into tablets; (8) calcinate at 500℃ for 2h to obtain methanation catalyst carrier I.

Embodiment 2

[0019] Example 2: (1) 250g of magnesium oxide and 300g of alumina powder were added to a certain proportion of water and mixed; (2) Under stirring, 50g of methylpentanol was added to the mixture formed in step 1; (3) 2 The prepared mixture was added to the autoclave, and hydrothermally treated at 250°C and 6.0MPa for 3h; (4) The materials in the autoclave were taken out, washed, filtered, and dried; (5) Roasted at 1100°C for 2h; (6) ) 4% cellulose acetate was added for granulation; (7) compressed into tablets; (8) calcined at 300°C for 3 hours to obtain methanation catalyst carrier II.

Embodiment 3

[0020] Example 3: (1) Add 650g of magnesium sulfate and 500g of aluminum nitrate powder to a certain proportion of water and mix; (2) Under stirring, add 60g of polyethylene glycol and 20g of methylpentanol to the mixture formed in step 1 (3) Put the mixture prepared in step 2 into the autoclave, and hydrothermally heat it at 300°C and 3.0MPa for 2h; (4) Take out the materials in the autoclave, wash, filter, and dry; (5) 800 Calcining at ℃ for 3h; (6) adding 4% nitrocellulose for granulation; (7) compressing into tablets; (8) calcining at 400℃ for 2h to obtain methanation catalyst carrier III.

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Abstract

The invention belongs to the technical field of catalysis, relates to a method for preparing a high-stability methanation catalyst carrier and particularly relates to a method for preparing a high-stability magnesia-alumina spinel catalyst carrier by adopting a hydrothermal synthesis method. The carrier can be applied to the preparation of a catalyst by a dipping method and is especially suitable for serving as a carrier of a methanation catalyst. The methanation catalyst carrier is prepared through adding water and a dispersant which are in a certain ratio into a soluble magnesium salt or a magnesium oxide and a soluble aluminum salt or an aluminum oxide, then, putting the mixture into a high-pressure reactor, carrying out hydrothermal treatment for certain time under the conditions of certain pressure and temperature, carrying out cooling and depressurizing, opening the high-pressure reactor, taking out the material from the reactor, subjecting the material to washing, carrying out filtering, drying, roasting, pelleting and tabletting forming, and then, carrying out roasting. The carrier has good hydrothermal stability; and the methanation catalyst prepared by adopting the carrier has the characteristics that the heat-resisting stability is good, the applicable temperature zone is wide, carbon deposition is not easy under the condition of high CO content, and the like.

Description

Technical field [0001] The invention belongs to the technical field of catalysis and relates to a method for preparing a high-stability methanation catalyst carrier. Specifically, it relates to a method for preparing a high-stability magnesia-aluminum spinel support by adopting a hydrothermal synthesis method. The support can be used for preparing a catalyst by an impregnation method, and is particularly suitable as a support for a methanation catalyst. Background technique [0002] In recent years, with the successive completion and commissioning of national gas transmission projects such as "Shanxi Gas into Beijing" and "West-East Gas Transmission", the demand for natural gas has exploded. It is predicted that natural gas, as an efficient and clean energy, will demand 170~210 billion Nm in 2015 3 , While the output in the same period can only reach 140 billion Nm 3 , The gap between supply and demand is about 30~70 billion Nm 3 . Due to the huge gap between the supply and dema...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/10B01J23/755C07C9/04C07C1/04C07C1/12
Inventor 张杰朱艳芳吴琳吴学其徐本刚蔡成伟蔡进黄先亮魏士新
Owner CHINA PETROLEUM & CHEM CORP
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