Method for coproduction of carbon black and high-purity hydrogen by high-temperature pyrolysis of methane

Abstract

The invention discloses a method for coproduction of carbon black and high-purity hydrogen by high-temperature pyrolysis of methane, which comprises the following steps: taking fuel gas with low caloric value of 1300-1500kcal / Nm3 as a fuel, taking methane-containing gas as a raw material, adopting the alternate working mode of controlling the quantity of supplied oxygen used for combustion-supporting for further promoting the full combustion of the fuel gas with the low caloric value, storing heat in a reaction furnace, removing the residual gas and carrying out methane pyrolysis, and building a methane non-oxygen high-temperature pyrolysis reaction environment, and the method specifically comprises the process steps of regulating the combustion-supporting gas, storing the heat in the reaction furnace, removing the residual gas, carrying out the methane pyrolysis, collecting the carbon black, and purifying for producing the hydrogen. The process is simple, and the amplification of production capacity and the continuous high-efficient production can be realized through the multi-stage combination of the pyrolysis reaction furnaces. The method can not only fully utilize the low-caloric value fuel gas resources and realize high reaction efficiency, but also reduce the emission of greenhouse gas and realize the low-carbon clean circulatory production, and a set of production process can realize the coproduction of the high-quality carbon black and the high-purity hydrogen.

Description

technical field

[0001] The invention belongs to the technical field of deep processing technology of coal chemical industry, and specifically relates to a method for high-temperature cracking of methane and co-production of carbon black and high-purity hydrogen with simple process, using gas with low calorific value as combustion-supporting gas and high production efficiency. Background technique

[0002] Carbon black is an important chemical raw material. As a reinforcing filler in the rubber industry, a colorant or toner for rubber, it is widely used in inks, paints, leather, chemical fibers, metallurgy, electronics, photosensitive materials, and black agricultural films. And packaging materials and many other fields. The prior art carbon black production process includes furnace black, channel black, pyrolysis black and lamp soot black and other production processes. Hydrogen is not only used as an industrial raw material, but also a clean and efficient energy source, wh...

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