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Sulfur-containing methane directly for reactive absorption enhancement on hydrogen production method from methane steam reformation

A methane water vapor and absorption enhancement technology, applied in chemical instruments and methods, hydrogen, inorganic chemistry, etc., can solve the problems of consuming large equipment, manpower and energy resources, and achieve the goal of reducing the pretreatment process, reducing emissions, and shortening the process Effect

Inactive Publication Date: 2009-02-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above desulfurization methods need to consume a lot of equipment, manpower and energy resources

Method used

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  • Sulfur-containing methane directly for reactive absorption enhancement on hydrogen production method from methane steam reformation
  • Sulfur-containing methane directly for reactive absorption enhancement on hydrogen production method from methane steam reformation
  • Sulfur-containing methane directly for reactive absorption enhancement on hydrogen production method from methane steam reformation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Preparation of composite catalyst RSER-1, the weight percentage of each component is NiO 20%, CaO 30%, Al 2 o 3 50%. Get 5g composite catalyst, pack in the fixed-bed reactor, heat up and CaCO 3 Decomposed into the active absorption component CaO, and with H 2 reduction. At a reaction temperature of 600°C and normal pressure, water vapor and methane containing 200ppm of hydrogen sulfide are introduced, the molar ratio of water to carbon is 4, and the product gas is condensed to remove water vapor, and the gas composition is analyzed online by gas chromatography to be 96.3% hydrogen, CO 2 2.0%, methane conversion rate 87.0%.

Embodiment 2

[0047] Preparation of composite catalyst RSER-2, the weight percentage of each component is NiO 15%, CaO 25%, Al 2 o 3 37%, SiO 2 twenty three%. Get 5g composite catalyst, pack in the fixed-bed reactor, heat up and CaCO 3 Decomposed into the active absorption component CaO, and with H 2reduction. At a reaction temperature of 600°C and a pressure of 0.2 MPa, water vapor and methane containing 200 ppm of hydrogen sulfide are introduced, the molar ratio of water to carbon is 4, and the product gas is condensed to remove water vapor, and the gas composition obtained by online analysis with a gas chromatograph is hydrogen 94.4 %, the conversion rate of methane is 80.9%.

Embodiment 3

[0049] Preparation of composite catalyst RSER-3, the weight percentage of each component is NiO 30%, CaO 32%, Al 2 o 3 33%. ZnO 5%, get 5g composite catalyst, pack in the fixed-bed reactor, heat up CaCO 3 Decomposed into the active absorption component CaO, and with H 2 reduction. At a reaction temperature of 600°C and a pressure of 0.2 MPa, water vapor and methane containing 200 ppm of hydrogen sulfide are introduced, the molar ratio of water to carbon is 5, and the product gas is condensed to remove water vapor, and the gas composition obtained by online analysis with a gas chromatograph is hydrogen 96.9 %, the conversion rate of methane is 88.5%.

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Abstract

The invention discloses a method for producing hydrogen by directly reacting and absorbing the enhanced methane steam with sulfur-containing methane and by reforming. The sulfur-containing methane and the steam are introduced into a reactor and react to generate the hydrogen under the action of a composite catalyst. The composite catalyst comprises the following components by weight percentages: 10-50% of CaO, 5-30% of NiO, 5-50% of Al2O3 and 0-30% of SiO2 and 0.5-10% of ZnO can be added. The adoption of the method ensures that the methane process gas that has less than 200ppm hydrogen sulfide can be directly taken as a raw material for reforming the methane steam, which avoids the poisoning of H2S to nickel-based catalyst, reduces the pre-treatment process of the sulfur-containing methane, shortens the process and lowers the cost.

Description

technical field [0001] The invention relates to a method for hydrogen production by reaction-absorption enhanced steam reforming of methane, in particular a method in which sulfur-containing methane is directly used for reaction-absorption enhanced steam reforming of methane to produce hydrogen. Background technique [0002] Hydrogen is mainly used in petrochemical industry, oil refining industry and hydrogen source of hydrogen energy in the future, and plays an important role in the development of national economy. Natural gas is rich in resources and has become the main raw material for hydrogen production. Hydrogen production from natural gas is currently the lowest-cost hydrogen production method in the world. At present, more than 70% of hydrogen in industrial hydrogen production in the world is produced from natural gas. The common method is to produce hydrogen by catalytic reforming and conversion of natural gas (ie methane) and steam. [0003] The natural gas extra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/40
Inventor 吴素芳李联豹
Owner CHINA PETROLEUM & CHEM CORP
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