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A kind of preparation method of highly stable 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: 2019-02-22
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) Mix 800g of magnesium nitrate and 300g of alumina powder with a certain proportion of water; (2) Add 60g of ethylene glycol to the mixture formed in step 1 under stirring; (3) Add the mixture of step 2 The prepared mixture was put into the 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) Roasted at 700°C for 3h; (6) Add 3% methylcellulose for granulation; (7) Press into tablets; (8) Calcinate at 500°C for 2 hours to obtain methanation catalyst carrier I.

Embodiment 2

[0019] Example 2: (1) Mix 250g of magnesium oxide and 300g of alumina powder with a certain proportion of water; (2) Add 50g of methyl pentanol to the mixture formed in step 1 under stirring; (3) Mix the 2 Put the prepared mixture into the autoclave, and hydrothermally treat it at 250°C and 6.0MPa for 3 hours; (4) Take out the materials in the autoclave, wash, filter, and dry; (5) Roast at 1100°C for 2h; (6) ) adding 4% cellulose acetate for granulation; (7) pressing into tablets; (8) roasting at 300°C for 3 hours to obtain methanation catalyst carrier II.

Embodiment 3

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

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PUM

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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 preparation method of a highly stable methanation catalyst carrier. It specifically relates to a method for preparing a highly stable magnesium-aluminum spinel carrier by using a hydrothermal synthesis method. The carrier can be used to prepare a catalyst by an impregnation method, and is particularly suitable as a carrier for a methanation catalyst. Background technique [0002] In recent years, with the successive completion and commissioning of national-level gas transmission projects such as "Shaanxi Gas Entering Beijing" and "West-to-East Gas Transmission", the demand for natural gas has shown explosive growth. It is predicted that natural gas, as an efficient and clean energy, will have a demand of 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(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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