Coal carbon dioxide gasification catalyst and preparation method thereof

Abstract

The invention discloses a coal carbon dioxide gasification catalyst and a preparation method thereof. The catalyst is composed of carbon active site loaded on a carrier, the carrier can provide machinery support and can transfer the oxygen atoms or oxygen ions, the carrier contains CO2 active site; the carbon active site and CO2 active site in the carrier are taken as catalytic activity components, transfer for oxygen ions is realized by a oxidation reduction reaction; the carrier transfers the oxygen atoms or oxygen ions, CO2 is taken as an oxidizing agent, and then ground state carbon is gasified to CO. The catalyst has good catalytic activity, compared with a traditional catalyst, the catalyst in the invention has stronger catalysis performance, and the catalysis condition is more peaceful.

Description

Technical field: [0001] The invention belongs to the technical field of coal gasification, and in particular relates to a coal carbon dioxide gasification catalyst and a preparation method thereof. Background technique: [0002] According to literature reports, most of the catalysts used for gasification coal function in the environment of water vapor or air. For example, in the 1970s, the American Exxon Company proposed the K 2 CO 3 As a catalyst, under the conditions of 3MPa and 700°C, using water vapor as a gasification agent, a coal pressurized fluidized bed catalytic gasification process for the purpose of producing artificial natural gas was developed, and Chinese patent CN103301865A also made further improvements on this . Carbon dioxide is a weaker oxidizing agent than water vapour. Due to its own structural stability, carbon dioxide is very chemically inert. Therefore, the catalytic activity of the existing coal gasification catalysts will be greatly reduced in ...

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Problems solved by technology

However, this also creates a problem that it is difficult to completely recycle the catalyst due to the strong interaction (such as chemical bonds) with the carbon-based solid reactant particle residue after the gasification reaction, which greatly reduces the recycling rate of the catalyst and causes a large amount of catalyst usage. increase, resulting in a significant increase in the cost of coal gasification

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