Biomass-based carbon material supported nano-nickel catalyst, preparation method and application thereof

Abstract

The invention discloses a biomass-based carbon material loaded nano nickel catalyst, a preparation method and application thereof. According to the invention, the catalyst is synthesized from biomass carbon and metallic nickel through a one-step hydrothermal method, wherein the metallic nickel is loaded into degraded gaps of the carbon material while the carbon material is generated, the content of the metallic nickel is 5-10 wt%, the content of a carbon-based carrier is 90-95 wt%, the particle size of metal nickel can reach 4.23 nm, and the dispersity of nickel reaches 23.64%; low-cost biomass carbon is used as a carrier, and nickel nanoparticles which are small in particle size and uniform in distribution are obtained; the used catalyst can be used for recovering nickel metal through simple calcination, so that cyclic utilization of the nickel metal is realized; the catalyst is applied to the technical field of synthesis gas preparation through carbon dioxide reforming; the catalyst prepared by the invention can be maintained for at least 500 hours and is not inactivated in a carbon dioxide reforming stability experiment, and the conversion rates of methane and carbon dioxide can be respectively stabilized at 80-92% and 90-98%; and the catalyst has high activity and stability, and carbon deposition is hardly generated in the reaction process.

Description

[0001] The invention belongs to the technical field of preparation of nano-metal catalysts, and in particular relates to a biomass-based biomass carbon material-loaded nano-nickel catalyst and its preparation method and application, in particular to the use of the catalyst in methane-carbon dioxide reforming into synthesis gas application. Background technique [0002] my country has abundant geological reserves of natural gas and shale gas, and the total recoverable amount is optimistic. At the same time, biogas, as a clean energy, is playing an increasingly important role in the field of energy utilization. Methane is the main component of natural gas, shale gas and biogas. Therefore, the research and development of methane utilization technology is one of the current international hot topics. Methane has great industrial prospects in power generation, extraction of cracking raw materials, production of synthetic oil, hydrogen production, methanol production, ethylene produc...

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Problems solved by technology

[0006] Patent 201711446762.4 mentions a carbon-supported nickel metal catalyst and its preparation method, but the carbonization of the biomass and the loading of the metal are carried out separately, and the particle size of the active nickel metal is as high as 20-40nm, because the catalyst is sintered and agglomerated, As a result, the metal dispersion is not high, and when the loading of metal nickel reaches more than 15%, it is possible to achieve a better catalytic effect in the carbon dioxide reforming reaction with a conversion rate of methane and carbon dioxide higher than 80%.

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