Method for catalyzing coke-carbon dioxide gasification based on chemical-looping principles

Abstract

The invention specifically discloses a method for catalyzing coke-carbon dioxide gasification based on chemical-looping principles, belonging to the field of coal gasification. The method comprises the following steps: conveying a catalyst into a gasification furnace for contact with a raw coke material so as to realize coke-carbon dioxide gasification, wherein the catalyst releases oxygen duringgasification; conveying the catalyst having released oxygen into a calciner for calcining so as to reduce the structure of the catalyst; and conveying the catalyst into the gasification furnace for participation in coke-carbon dioxide gasification again. The method can realize cyclic utilization of the catalyst during catalytic oxidation and calcining reduction, improves the recycling rate of thecatalyst and has the advantages of high recycling rate, easiness, reliability, convenience in implementation, etc.

Description

technical field [0001] The invention belongs to the field of coal gasification, and more specifically relates to a method for catalytic gasification of coal char carbon dioxide by using the chemical chain principle. Background technique [0002] As the most abundant energy in China, coal accounts for 70% of my country's total energy consumption, but direct combustion will emit a lot of smoke and harmful gases. Coal gasification is one of the main technologies that can use coal more cleanly and efficiently. One has attracted the attention of many countries, and coal coke carbon dioxide technology not only realizes the clean utilization of coal, but also realizes the utilization of greenhouse carbon dioxide gas. [0003] The reaction rate of coal char carbon dioxide gasification is slow and the reaction temperature is very high. The use of catalysts can greatly reduce the requirements for equipment and materials, and at the same time increase the gasification reaction rate. Th...

AI Technical Summary

Problems solved by technology

The research on catalysts has changed from early single metal catalysts to alkali metal, alkaline earth metal and transition metal salts, and now to composite catalysts and disposable catalysts. Although the catalysts are gradually improving, there are still volatilization, deactivation and low recovery. and other problems, which affect the gasification equipment, and cannot effectively recycle the catalyst

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