A method for catalytic gasification and methane enrichment of gasification coke

Abstract

The invention relates to a method for catalyzing gasification and rich methanation by virtue of gasifying coke. The method comprises the following steps: adding at least one of 10wt%-20wt% of Na2CO3 or CaO into red clay nickel mineral powder, uniformly mixing, respectively putting brown coal, gas coal and rich coal into a crusher, carrying out primary crushing, adding an additive, mixing to obtain a mixture, putting the mixture into a reaction crusher, crushing, and mixing, so as to obtain crushed coal; and carrying out tamping formation and coking on the crushed coal, crushing gasifying coke, and gasifying coke particles under the actions of temperature, pressure and a gasifying agent. The method has the advantages of high carbon utilization rate, low cost and high methane yield.

Description

Technical field [0001] The invention belongs to the field of coal coke catalytic preparation of natural gas, and specifically relates to a coke for gasification and a method for gasification and methanization. Background technique [0002] Coking belongs to the traditional coal chemical industry. China's coke production capacity is severely surplus, with a production capacity of approximately 680 million tons and a capacity utilization rate of approximately 65%, of which approximately 90% of the coke is used in the smelting industry. Therefore, the use of existing equipment to produce gasified coke and expand the use of coke is of positive significance for resolving excess coke production capacity in my country and promoting the development of the industry. [0003] Gasified coke is a kind of coke used for gas production. It requires low ash content, high ash melting point, appropriate and uniform lumpness. Although the existing metallurgical coke can be used as gasified coke, it i...

AI Technical Summary

Problems solved by technology

However, large-scale industrial gasification coke production has just started in my country, and there is no precedent in the field of clean coal technology in foreign countries, and most of the existing research focuses on coal gasification technology for high-efficiency methane production, and there are few studies on gasification coke gasification methane production

Patent document CN101906339A couples coal gasification and methanation technology to produce substitute natural gas in an integrated way, but the subsequent equipment investment of this process is large, and a large amount of carbon dioxide will be produced in the process of producing syngas

Patent CN102021037B provides a method and device for catalytic methane production from coal, which realizes coal cracking while producing natural gas, but this technology consumes a lot of water and has low carbon utilization rate

Patent CN102242006A provides a process for direct coal hydrogenation to methane, but the methane yield of this process is low, the cost of hydrogen used is high, and the economic benefit is poor

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