Method for producing hydrogen through coupled catalytic reforming and membrane separation reaction, and device thereof

Abstract

The invention belongs to the technical field of chemical equipment, and relates to a method for producing hydrogen through coupled catalytic reforming and membrane separation reaction, and a device thereof, in particular to a method for producing hydrogen through fluidized-bed methane steam reforming, and a device thereof, which apply to the fields of petroleum, chemical industry and fuel cells. A main structure comprises a feed gas inlet, a pre-distribution chamber, a gas distribution plate, a palladium membrane component, a catalyst bed layer, a sampling port, a fluidized-bed reaction-zone bed body, a metal connection tube, a heating system, a hydrogen duct, an expansion section, a super pure hydrogen outlet, a vacuum pump, a backpressure valve, a liquid rotor flow meter, a water pump, an exhaust gas outlet, a heat exchanger, a gas rotor flow meter, a gas pump and a preheater, wherein the components are in gas-liquid communication and organic coordination to form a methane steam reforming hydrogen production device or reactor with a hydrogen selective membrane fluidized bed, and the top of the fluidized-bed reaction-zone bed body is sealed by adopting a cover-type structure. The invention has the advantages of simple process, low investment in equipment, good membrane separation performance and high hydrogen production rate.

Description

Technical field: [0001] The invention belongs to the technical field of chemical equipment, and relates to a method for producing hydrogen by coupling catalytic reforming and membrane separation reaction and its device, in particular to a method for producing hydrogen by using membrane fluidized bed methane steam reforming and its device, which is suitable for petroleum , chemical and fuel cell fields. Background technique: [0002] With the rise of fuel cell vehicles, hydrogen energy, as a clean, efficient, safe, and sustainable energy source, is regarded as the energy source with the most development potential in this century. Methane steam reforming is also a hydrogen production method commonly used in industry at present. . At present, the traditional methane steam reforming reactor uses a fixed bed, and pressure swing adsorption is the most commonly used hydrogen purification technology. Due to the large heat transfer and diffusion resistance of the fixed bed, and the ...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of large heat transfer and diffusion resistance and large axial temperature gradient in the fixed bed in the prior art; to improve the shortcomings of the prior art device, such as large investment, long process flow, and large floor space, to provide a A new membrane fluidized bed methane steam reforming reaction method and device for hydrogen production; using coupling reforming reaction and membrane separation reaction, shortening the reaction process, saving energy consumption, and further reducing reaction costs; by adjusting the operating temperature, operating pressure, and raw material volume , raw material gas ratio, catalyst dosage, catalyst particle size distribution, membrane tube surface area, membrane tube arrangement, to achieve the best value of raw material conversion rate and hydrogen production rate

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