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Low-temperature high-activity nickel-based bimetallic methanation catalyst, preparation method and applications thereof

A technology of methanation catalyst and active metal, which is applied in the field of low-temperature high-activity nickel-based bimetallic methanation catalyst and its preparation, can solve the problems of low utilization rate of metal Ni, easy agglomeration of Ni particles, catalyst deactivation, etc., and achieves the preparation method Simple operation, long catalyst life and high catalytic activity

Inactive Publication Date: 2020-03-20
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the defects of low metal Ni utilization rate of high-temperature Ni-based methanation catalysts in the prior art, easy agglomeration of Ni particles and catalyst deactivation caused by carbon deposition, the object of the present invention is to provide a high-activity, Low-temperature and high-activity nickel-based bimetallic methanation catalyst with good stability

Method used

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  • Low-temperature high-activity nickel-based bimetallic methanation catalyst, preparation method and applications thereof
  • Low-temperature high-activity nickel-based bimetallic methanation catalyst, preparation method and applications thereof
  • Low-temperature high-activity nickel-based bimetallic methanation catalyst, preparation method and applications thereof

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Effect test

Embodiment 1

[0052] The dried mesoporous SiO 2 Molecular sieve SBA-16-EG was immersed in ethylene glycol in equal volume, stirred evenly, left at room temperature, and dried to obtain pretreated mesoporous molecular sieve SBA-16-EG with a specific surface area of ​​887 m 2 / g, the pore wall is 4 nm, and the pore volume is 0.75 cm 3 / g, the pore size was 4 nm; then the pretreated mesoporous molecular sieve dried SBA-16-EG was used in the next step. The mesoporous molecular sieve SBA-16-EG was dried at a temperature of 80°C for 12h.

[0053] Dissolve 0.55g nickel nitrate hexahydrate and 0.08g ferric nitrate nonahydrate in 2.0mL deionized water to prepare an impregnation solution, and impregnate the dried 1.0g pretreated mesoporous molecular sieve SBA-16-EG by an equal volume co-impregnation method In 2.0 mL of the dipping solution, it was allowed to stand for 8 hours, and then dried in a vacuum oven at a temperature of 60° C. for 12 hours. The obtained solid product is roasted in a muffle...

Embodiment 2

[0056] The dried mesoporous SiO 2 Molecular sieve SBA-16-EG was immersed in ethylene glycol in equal volume, stirred evenly, left at room temperature, and dried to obtain pretreated mesoporous molecular sieve SBA-16-EG with a specific surface area of ​​887 m 2 / g, the pore wall is 4 nm, and the pore volume is 0.75 cm 3 / g, the pore size was 3 nm; then the pretreated mesoporous molecular sieve dried SBA-16-EG was used in the next step. The mesoporous molecular sieve SBA-16-EG was dried at a temperature of 120 °C for 8 hours.

[0057] 0.23 g of nickel nitrate hexahydrate and 0.04 g of ferric nitrate nonahydrate were dissolved in 2.0 mL of deionized water to prepare an impregnation solution, and the dried 1.0 g of pretreated mesoporous SiO was prepared by an equal volume co-impregnation method. 2 The molecular sieve SBA-16-EG was immersed in 2.0 mL of the immersion solution, allowed to stand for 6 hours, and then dried in a vacuum oven at a temperature of 60° C. for 8 hours. T...

Embodiment 3

[0060] The dried mesoporous SiO 2 Molecular sieve SBA-16-EG was immersed in ethylene glycol in equal volume, stirred evenly, left at room temperature, and dried to obtain pretreated mesoporous molecular sieve SBA-16-EG with a specific surface area of ​​887 m 2 / g, the pore wall is 4 nm, and the pore volume is 0.75 cm 3 / g, the pore size was 6 nm; then the pretreated mesoporous molecular sieve dried SBA-16-EG was used in the next step. The mesoporous molecular sieve SBA-16-EG was dried at a temperature of 100 °C for 12 hours.

[0061] Dissolve 0.34g of nickel acetate hexahydrate in 2.0mL of deionized water to prepare a nickel salt solution, dissolve 0.08g of ferric nitrate nonahydrate in 2.0mL of deionized water to prepare a ferric nitrate solution, and use the equal volume immersion method to first immerse the dried 1.0 g of pretreated mesoporous SiO 2 Molecular sieve SBA-16-EG was immersed in 2.0 mL of ferric nitrate solution, allowed to stand for 6 h, then dried in a vacu...

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Abstract

The invention discloses a low-temperature high-activity nickel-based bimetallic methanation catalyst, which uses a mesoporous molecular sieve SBA-16-EG as a carrier, uses metal Ni as a first active component and uses a second active metal M as a second active component, wherein the second active metal M is at least one selected from Fe, Co, La and Mo, and based on 100 parts by weight of the catalyst (calculated as metal elements), the content of nickel is 5-30 parts by weight, the content of the second active metal M is 0.1-10 parts by weight, and the balance is the mesoporous molecular sieveSBA-16-EG. The low-temperature high-activity nickel-based bimetallic methanation catalyst provided by the invention does not contain precious metal components, the preparation method is simple and easy to implement, the precursor is not wasted, the performance is relatively high, and the catalyst has great advantages in performance price ratio.

Description

technical field [0001] The invention belongs to the technical field of industrial catalysis, and relates to a low-temperature and high-activity nickel-based bimetallic methanation catalyst and a preparation method and application thereof. Background technique [0002] Methanation technology is the research focus for the development of coal-to-natural gas technology, and its core is an efficient and stable methanation catalyst. Since syngas methanation releases a lot of heat (CO+3H 2 →CH 4 +H 2 O,ΔH 298K =-206.1kJ / mol), low temperature and high pressure will promote the forward progress of the reaction. However, in terms of reaction kinetics, low temperature will greatly reduce the reaction rate and thus reduce the throughput. Therefore, it is necessary to study a catalyst with lower activation energy, so that the catalyst can have higher activity at lower temperature, so as to achieve a double harvest of yield and benefit. [0003] Nowadays, catalysts with higher tempe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/03B01J37/02B01J35/10C07C1/04C07C9/04
CPCB01J29/0333B01J37/0201C07C1/0435C07C1/046B01J2229/18B01J35/617B01J35/638B01J35/635B01J35/633B01J35/647C07C9/04
Inventor 辛忠高文莉
Owner EAST CHINA UNIV OF SCI & TECH
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