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Preparation method of high temperature resistant nickel-based methanation catalyst

A methanation catalyst, high temperature resistant technology, applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of catalyst activity decline, coke deposition, catalyst sintering, etc., and achieve a short synthesis process, Reasonable material ratio, good high temperature anti-sintering performance

Active Publication Date: 2019-05-31
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, studies have found that because the methanation catalyst needs to withstand long-term high-temperature shocks in the bed, it will cause sintering and carbon deposition of the catalyst, and sintering and carbon deposition are the main reasons for the decline in catalyst activity, which restricts methanation catalysts at home and abroad. The main bottleneck of technology

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  • Preparation method of high temperature resistant nickel-based methanation catalyst
  • Preparation method of high temperature resistant nickel-based methanation catalyst
  • Preparation method of high temperature resistant nickel-based methanation catalyst

Examples

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Embodiment 1

[0074] A method for preparing high temperature resistant nickel-based methanation catalyst. The amount of chemical substances required for preparation is determined according to a preset range, in grams, milliliters, and centimeters. 3 It is the unit of measurement, when it is industrialized, it is in kilograms, liters, meters 3 It is the unit of measurement. The heating, calcination and decomposition of the catalyst are carried out in a high-temperature muffle furnace, and are completed under heating and air flow.

[0075] Such as figure 1 Shown is the state diagram of high-temperature muffle furnace heating and decomposition preparation. The position of each part and the connection relationship must be correct, proportioning according to quantity, and operation in order. The high-temperature muffle furnace 1 and the air compressor 18 are laid flat on the marble test bench 11; in the high-temperature muffle furnace 1, there is the furnace cavity 2, and the lower part of the middl...

Embodiment 2

[0103] To prepare high temperature resistant nickel-based methanation catalyst, the chemical substance ratio can also be as follows:

[0104] Sodium silicate: Na 2 SiO 3 • 9H 2 O 11.84g±0.01g

[0105] Nickel acetate: Ni(CH 3 COO) 2 • 4H 2 O 5.00g±0.01g

[0106] Aluminum nitrate: Al(NO 3 ) 3 • 9H 2 O 3.68g±0.01g

[0107] Barium nitrate: Ba(NO 3 ) 2 0.85g±0.01g

[0108] Polyethylene glycol: HO(CH 2 CH 2 O) 136 H 3.00g±0.01g

[0109] Deionized water: H 2 O 2000mL±50mL

[0110] Air: 78%N 2 , 21%O 2 , Other components 1% 50000cm 3 ±100cm 3

[0111] The specific preparation method is the same as in Example 1. The ratio of various substances in the synthesis catalyst is: SiO 2 50%, Al 2 O 3 It is 10%, NiO is 30%, and BaO is 10%.

Embodiment 3

[0113] To prepare high temperature resistant nickel-based methanation catalyst, the chemical substance ratio can also be as follows:

[0114] Sodium silicate: Na 2 SiO 3 • 9H 2 O 9.47g±0.01g

[0115] Nickel acetate: Ni(CH 3 COO) 2 • 4H 2 O 6.66g±0.01g

[0116] Aluminum nitrate: Al(NO 3 ) 3 • 9H 2 O 7.36g±0.01g

[0117] Barium nitrate: Ba(NO 3 ) 2 0.85g±0.01g

[0118] Polyethylene glycol: HO(CH 2 CH 2 O) 136 H 3.00g±0.01g

[0119] Deionized water: H 2 O 2000mL±50mL

[0120] Air: 78%N 2 , 21%O 2 , Other components 1% 50000cm 3 ±100cm 3

[0121] The specific preparation method is the same as in Example 1. The ratio of various substances in the synthesis catalyst is: SiO 2 40%, Al 2 O 3 It is 20%, NiO is 40%, and BaO is 10%.

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Abstract

The invention discloses a method for preparing a high-temperature resistant nickel-based methanation catalyst, which includes the following steps: (1) Preparing a salt aqueous solution; (2) Preparing a salt aqueous solution; (3) Preparing a sodium silicate aqueous solution; 4), prepare and mix the solution; (5), centrifuge and wash to obtain a mixed precipitated product; (6), dry it into a solid phase mixture; (7), heat and decompose and roast at high temperature; (8), take out the product: high temperature resistance Nickel-based methanation catalyst. This method has a simple process, does not require the addition of an alkaline precipitant, has a short synthesis process, is easy to operate, has reasonable material ratios, detailed and accurate data, stable product selectivity, and good high-temperature anti-sintering properties of the catalyst. It also has good performance at a reaction temperature of 600°C. The catalytic ability can be used to produce natural gas from coal-to-syngas. It is an ideal preparation method for high-temperature resistant nickel-based methanation catalysts.

Description

Technical field [0001] The invention belongs to the technical field of preparation and application of coal-based natural gas catalysts, and specifically relates to a method for preparing high-temperature resistant nickel-based methanation catalysts. The prepared high-temperature mesoporous structure nickel-based methanation catalysts can be used to synthesize natural gas from coal. Background technique [0002] As an energy source, coal is used mainly in direct combustion for power generation, conversion to oil, natural gas, methanol, olefins and other technologies. Among them, coal-to-natural gas has the highest efficiency, which can theoretically exceed 60%. Therefore, from the perspective of comprehensive energy utilization efficiency, the conversion of coal into natural gas as a clean energy is the most efficient and energy-saving; at the same time, low-carbon development has become a new round of international economic growth and the focus of competition. The core is to estab...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/78
CPCB01J23/002B01J23/78B01J37/0009B01J37/03B01J2523/00B01J35/60B01J35/40B01J2523/25B01J2523/31B01J2523/41B01J2523/847
Inventor 杜朕屹秦志峰
Owner TAIYUAN UNIV OF TECH
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