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

A high-temperature cracking and methane gas technology, which is applied in the fields of chemical instruments and methods, hydrogen, inorganic chemistry, etc., can solve the problems of long production cycle, high energy consumption, incomplete reaction, etc., and achieve less greenhouse gas emissions, simple process, and high reaction efficiency. high efficiency effect

Active Publication Date: 2012-08-29
QUJING ZHONGYI FINE CHEMICAL INDUSTRY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These methods have the disadvantages of high energy consumption, incomplete reaction, and emission of a large amount of greenhouse gas CO 2 At the same time, multiple follow-up processes such as carbon monoxide conversion, carbon dioxide removal, and methanation are required to obtain hydrogen with high purity. The production cycle is long, and high-quality carbon black cannot be produced at the same time.

Method used

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

Examples

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Effect test

Embodiment 1

[0029] The oxygen-enriched gas with an oxygen content of 25% is regulated by the pressure regulating device 2, and has a calorific value of 1300kcal / Nm 3 The gas is passed into the combustion section of cracking reaction furnace 1 at a volume ratio of 1:4, and burned for about 10 minutes, so that the temperature of cracking reactor 1 reaches 1400°C, stops feeding gas and combustion-supporting gas, and removes residual gas from combustion; contains 80 methane % of the methane gas is passed into the preheated cracking reactor 1 reaction zone to undergo a cracking reaction to generate hydrogen-rich gas containing carbon black, and stop feeding the methane gas after about 10 minutes; two cracking reactors 1 work alternately for continuous production; The hydrogen-rich gas containing carbon black enters the cooling device 3 of the oil cooling method, and after being cooled by heat exchange, it is sent to the carbon black collection device 4 to separate the carbon black, and the carb...

Embodiment 2

[0032] The oxygen-enriched gas with an oxygen content of 35% is regulated by the pressure regulating device 2, and has a calorific value of 1400kcal / Nm 3 The gas is passed into the combustion section of cracking reactor 1 at a volume ratio of 1:3, and burned for about 10 minutes to make the temperature of cracking reactor 1 reach 1450°C, stop feeding gas and combustion-supporting gas, and get rid of combustion residual gas; % of the methane gas is passed into the preheated cracking reactor 1 reaction zone to undergo a cracking reaction to generate hydrogen-rich gas containing carbon black; after about 10 minutes, stop feeding the methane gas; two cracking reactors 1 work alternately for continuous production; The hydrogen-rich gas containing carbon black enters the cooling device 3 of the water cooling method, and after being cooled by heat exchange, it is sent to the carbon black collection device 4 to separate the carbon black, which is packaged as a finished product after gr...

Embodiment 3

[0035]The oxygen-enriched gas with an oxygen content of 30% is regulated by the pressure regulating device 2, and has a calorific value of 1500kcal / Nm 3 The fuel gas is passed into the combustion section of the cracking reactor 1 at a volume ratio of 1:3, and burned for about 10 minutes to make the temperature of the cracking reactor 1 reach 1500°C, stop feeding the fuel gas and combustion-supporting gas, and get rid of combustion residual gas; % of the methane gas is passed into the preheated cracking reactor 1 reaction zone to undergo a cracking reaction to generate carbon black-containing hydrogen-rich gas, and stop feeding the methane gas after about 10 minutes; two cracking reactors 1 work alternately for continuous production; The hydrogen-rich gas containing carbon black enters the cooling device 3 of the air cooling method, and after being cooled by heat exchange, it is sent to the carbon black collection device 4 to separate the carbon black, and the carbon black is gr...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/50C01B3/24
Inventor 兰明祥罗国林
Owner QUJING ZHONGYI FINE CHEMICAL INDUSTRY CO LTD
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