A method for producing light tar by catalytic co-refining of low-rank coal and methane

Abstract

The invention belongs to the fields of energy and chemical industry, particularly provides a method for producing light tar by catalyzing and corefining low-rank coal and methane, and mainly solves the technical problem that the quality of pyrolytic tar of low-rank coal is increased is solved so as to increase the content of light aromatic hydrocarbon with important application values in tar. A down reactor, which is a riser coupling reactor, is adopted as a main body reaction unit, and the main body reaction unit is high in heat and mass transfer efficiency, simple in technological process, high in integration level and continuous and reliable in operation; high-temperature semicoke is taken as a catalyst, and methane is cracked into hydrogen, so that hydrogenation pyrolysis of coal is realized, the yield of tar and the content of light aromatic hydrocarbon inside tar are improved, and the cost of the catalyst and the hydrogen source is obviously reduced; moreover, the high-temperature semicoke is taken as a solid heat carrier, so that the heat efficiency of the process is greatly improved; moreover, an new approach for efficient clean utilization is developed for methane-rich rawmaterial gas such as traditional fossil energy coal and natural gas.

Description

technical field [0001] The invention belongs to the field of energy and chemical industry, and in particular relates to a method for producing light tar by catalytic co-refining of low-rank coal and methane. Background technique [0002] Aromatic compounds, especially single-ring aromatics such as benzene, toluene and xylene, which have important synthetic significance, are indispensable organic chemical basic raw materials and play an important role in the development of the national economy. At present, the production of aromatics mainly comes from petrochemical industry. According to the "2015 Domestic and Foreign Oil and Gas Industry Development Report" statistics, in 2015, my country's dependence on foreign crude oil reached 60.6%. Therefore, relying solely on petrochemicals to produce aromatics will face enormous pressure, and it is imperative to seek alternative or supplementary raw materials. my country is a typical country with "more coal and less oil". Adopting t...

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Problems solved by technology

However, the hydrogen production reaction of methane reforming is an endothermic reaction, and additional catalysts need to be introduced, which increases energy consumption and economic costs.

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