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Catalyst for methanation, and preparation method and application thereof

A catalyst, methanation technology, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc. Effect of good resistance, good thermal stability

Active Publication Date: 2013-07-10
DATANG INT CHEM TECH RESINST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In contrast, China only has partial methanation technology for atmospheric pressure to produce city gas or for trace CO / CO 2 Atmospheric pressure methanation catalyst for gas purification, that is, a catalyst that has not yet been maturely applied in the production of natural gas by methanation under high temperature and high pressure conditions

Method used

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  • Catalyst for methanation, and preparation method and application thereof
  • Catalyst for methanation, and preparation method and application thereof
  • Catalyst for methanation, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] This example is used to illustrate the preparation of the catalyst of the present invention.

[0040] 140g Ni(NO 3 ) 2 , 16.4g La(NO 3 ) 3 Dissolve in water, add 31.5g Al 2 o 3 , made into powder by mixing and impregnating, crushed properly and rolled into pellets with a particle diameter of about 4 mm, as the core of the catalyst.

[0041] 6.2g Sr(NO 3 ) 2 , 1.1g NH 4 VO 3 After dissolving in water, saturate impregnate the inner core, dry at 90°C for 12 hours, and bake at 400°C for 6 hours to form an intermediate layer.

[0042] Al 2 o 3 The powder is rolled on the surface of the above-mentioned intermediate layer as a shell, that is, a catalyst with a particle size of about 5mm is made.

[0043] After measurement and conversion, in the catalyst, Ni element accounts for 44.58wt%, La element accounts for 6.95wt%, and Sr and V elements account for 3.02wt%.

[0044] The catalyst was reduced for 4 hours at 600°C in a hydrogen atmosphere, and then the catalyst ...

Embodiment 2

[0052] This example is used to illustrate the preparation of the catalyst of the present invention.

[0053] 124.8g Ni(NO 3 ) 2 , 16.4g La(NO 3 ) 3 Dissolve in water, add 35.5g Al 2 o 3 , made into powder by mixing and impregnating, crushed properly and rolled into pellets with a particle diameter of about 4 mm, as the core of the catalyst.

[0054] 6.2g Sr(NO 3 ) 2 , 1.1g NH 4 VO 3 , 4.1g Ca(NO 3 ) 2 , 2.3g Cr(NO 3 ) 3 After dissolving in water, saturate impregnate the inner core, dry at 120°C for 8 hours, and bake at 600°C for 4 hours to form an intermediate layer.

[0055] Al 2 o 3 The powder is rolled on the surface of the above-mentioned intermediate layer as a shell, that is, a catalyst with a particle size of about 5mm is made.

[0056] After measurement and conversion, in the catalyst, Ni element accounts for 40.64wt%, La element accounts for 7.11wt%, and Sr, V, Ca and Cr elements account for 4.61wt%.

[0057] The catalyst was reduced for 4 hours at 60...

Embodiment 3

[0065] This example is used to illustrate the preparation of the catalyst of the present invention.

[0066] 124.8g Ni(NO 3 ) 2 , 14g Ce(NO 3 ) 3 Dissolve in water, add 36.1g Al 2 o 3 , made into powder by mixing and impregnating, crushed properly and rolled into pellets with a particle diameter of about 4 mm, as the core of the catalyst.

[0067] 6.2g Sr(NO 3 ) 2 , 1.1g NH 4 VO 3 , 4.1g Ca(NO 3 ) 2 , 2.3g Cr(NO 3 ) 3 After dissolving in water, saturate impregnate the inner core, dry at 120°C for 8 hours, and bake at 600°C for 4 hours to form an intermediate layer.

[0068] Al 2 o 3 The powder is rolled on the surface of the above-mentioned intermediate layer as a shell, that is, a catalyst with a particle size of about 5mm is made.

[0069] After measurement and conversion, in the catalyst, Ni element accounts for 40.87wt%, La element accounts for 6.13wt%, and Sr, V, Ca and Cr elements account for 4.64wt%.

[0070] The catalyst was reduced for 4 hours at 600°...

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Abstract

The invention provides a catalyst for methanation, wherein the catalyst has a three-layer core-shell structure; an inner core of the three-layer core-shell structure comprises a nickel oxide, a first assistant and aluminum oxide; a middle layer comprises a second assistant; a shell comprises aluminum oxide; the first assistant includes oxide of a rare-earth element; and the second assistant includes one or oxide of more of strontium, calcium, vanadium and chromium. A preparation method of the catalyst and application of the catalyst in a synthetic gas methanation technology are also provided.

Description

technical field [0001] The invention relates to a catalyst, in particular to a catalyst for methanation, a preparation method of the catalyst, and an application of the catalyst. Background technique [0002] The main components of syngas are carbon monoxide, hydrogen and carbon dioxide, which undergo a methanation reaction in the presence of a catalyst to generate methane, that is, natural gas. The methanation reaction of syngas is applicable to many fields, especially the field of coal-to-natural gas. Coal-to-natural gas produces syngas through coal gasification, and then produces natural gas through methanation. This process helps to make full use of my country's abundant coal resources and alleviate the shortage of natural gas reserves. At the same time, coal-to-natural gas technology is of great strategic significance to realize the efficient and clean utilization of coal in my country, promote the economic development of the western region, and ensure national energy...

Claims

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Application Information

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IPC IPC(8): B01J23/847B01J23/86C07C9/04C07C1/04
Inventor 李春启梅长松左玉帮邱波刘永健刘学武周帅林刘佳男贾靖华封志伟
Owner DATANG INT CHEM TECH RESINST
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