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A kind of synthesis gas methanation catalyst anti-carbon deposition and its preparation method and application

A technology of catalyst and gas methane, which is applied in the field of anti-carbon deposition catalyst and its preparation, can solve the problems of affecting the anti-carbon deposition ability of the catalyst, the inhomogeneity of magnesium aluminum spinel materials, and the difficulty of homogenizing raw materials, etc., to achieve weakening Coke phenomenon, reduce the bed reaction temperature, improve the effect of anti-coke ability

Inactive Publication Date: 2017-01-25
SEDIN ENG +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] It can be seen from the above patents that most of the current catalysts change the γ-Al by adding other components or by synthesizing dual supports. 2 o 3 The acidity of the catalyst is used to improve the carbon deposition resistance of the catalyst, but it is difficult to achieve uniform mixing of raw materials in the double carrier preparation process, so that the prepared magnesium aluminum spinel material will appear inhomogeneous, which will affect the carbon deposition resistance of the catalyst. ability

Method used

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  • A kind of synthesis gas methanation catalyst anti-carbon deposition and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Carrier pretreatment: 10g 80-100 mesh γ-Al 2 o 3 The carrier is calcined at 450°C for 2h;

[0030] (2) Impregnation and deposition: weigh 16.30g NiCl 2 ·6H 2 O and 0.624g La(NO 3 ) 3 ·6H 2 O dissolved in 15ml H 2 O, equal volume impregnation of pretreated γ-Al 2 o 3 , soaked at 30°C for 12h; then add 25wt% ammonia solution to control NH 3 ·H 2 O / Ni 2+ The molar ratio is 4:1, the deposition is 3h;

[0031] (3) Evaporation and drying: Evaporate the impregnated sample in (2) to a pH of 8.5 in a 90°C water bath and dry it at 100°C for 9 hours;

[0032] (4) Roasting: After grinding the dried carrier in (3), calcined at 550°C for 3h to obtain NiO / γ-Al 2 o 3 Precursor;

[0033] (5) Hydrogen reduction: NiO / γ-Al 2 o 3 The precursor is composed of 5% H by volume 2 with 95%N 2 The catalyst was obtained after reduction at 450°C for 9 hours in a mixed atmosphere. The composition of the product catalyst was Ni 37.6%, La 1.8%, γ-Al 2 o 3 60.6%.

[0034] See A...

Embodiment 2

[0037] (1) Carrier pretreatment: 10g 120-140 mesh γ-Al 2 o 3 The carrier is calcined at 550°C for 2h;

[0038] (2) Impregnation and deposition: weigh 14.17g NiCl 2 ·6H 2 O and 0.85 g MoCl 5 Dissolve in 15ml H 2 O, equal volume impregnation of pretreated γ-Al 2 o 3 , impregnated at 50°C for 6h; then add 25wt% ammonia solution to control NH 3 ·H 2 O / Ni 2+ The molar ratio is 8:1, and the deposition is 3h;

[0039] (3) Evaporation and drying: Evaporate the impregnated sample in (2) to a pH of 8.3 in a 70°C water bath, and dry it at 110°C for 4 hours;

[0040] (4) Roasting: After grinding the dried carrier in (3), calcined at 500°C for 2h to obtain NiO / γ-Al 2 o 3 Precursor;

[0041] (5) Hydrogen reduction: NiO / γ-Al 2 o 3 The precursor is 15% H in volume composition 2 with 85%N 2 Ni / γ-Al was obtained after reduction at 400℃ for 6h in a mixed atmosphere 2 o 3 Catalyst. The composition of the product catalyst is Ni32.8%, Mo2.1%, γ-Al 2 o 3 65.1%

[0042] See Atta...

Embodiment 3

[0045] (1) Carrier pretreatment: 10g 140-160 mesh γ-Al 2 o 3 The carrier is calcined at 350°C for 3h;

[0046] (2) Impregnation and deposition: Weigh 12.71g Ni(CH 3 COO) 2 4H 2 O and 1.42 g MoCl 5 dissolved in 15mlH 2 O, equal volume impregnation of pretreated γ-Al 2 o 3 , impregnated at 70°C for 4h; then add 25wt% ammonia solution to control NH 3 ·H 2 O / Ni 2+ The molar ratio is 7:1, the deposition is 3h;

[0047] (3) Evaporation and drying: Evaporate the impregnated sample in (2) to a pH of 8.5 in a 70°C water bath, and dry it at 100°C for 6 hours;

[0048] (4) Calcination: After grinding the dried carrier in (3), calcinate at 550°C for 1 hour to obtain NiO / γ-Al 2 o 3 Precursor;

[0049] (5) Hydrogen reduction: NiO / γ-Al 2 o 3 The precursor is 20% H in volume composition 2 with 80%N 2 Ni / γ-Al was obtained after reduction at 550℃ for 5h in a mixed atmosphere 2 o 3 Catalyst. The composition of the product catalyst is Ni 28.2%, Mo 4.3% γ-Al 2 o 3 67.5%.

[...

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Abstract

An anti-carbon synthesis gas methanation catalyst takes 55-85 percent by weight of gama-Al2O3 as a carrier, 10-40 percent by weight of Ni as an active component, and 1-7 percent by weight of one of Mo, Co, La and Ce as an additive.. The anti-carbon synthesis gas methanation catalyst disclosed by the invention has the advantages of high catalytic activity, high heat stability, strong anti-carbon capability and long catalyst service life.

Description

[0001] Technical field: [0002] The invention belongs to a catalyst and its preparation method and application, in particular to an anti-coking catalyst suitable for the methanation reaction of slurry bed synthesis gas, its preparation method and application. Background technique [0003] As an efficient, clean and high-quality fuel, natural gas has important applications in the fields of power generation, chemical industry and civil use. Especially in recent years, with the acceleration of my country's industrialization and urbanization process and the implementation of energy conservation and emission reduction policies, the demand for natural gas has risen sharply. However, my country's energy status is rich in coal, poor in oil, and low in gas. Coal accounts for about 70% of my country's primary energy consumption. Therefore, the country has successively built large-scale coal chemical industry bases in Shanxi, Inner Mongolia, Xinjiang and other rich coal producing areas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/755B01J23/83B01J23/883C10L3/08
Inventor 于智慧韩涛朱清亮程庆元李忠李志博
Owner SEDIN ENG
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