Method and system for hydrogen production through ethyl alcohol

Abstract

The invention provides a method for catalytic hydrogen production through ethyl alcohol. The method comprises the following steps that absolute ethyl alcohol serves as a raw material, under the actionof a catalyst, a catalytic cracking reaction is carried out, and a hydrogen and ethyl acetate mixed gas-phase product is obtained; after cooling is conducted, gas-liquid separation is conducted, andmixed gas-phase hydrogen and mixed liquid-phase ethyl acetate are obtained; the mixed gas-phase hydrogen enters a deoxygenization device containing a deoxidation catalyst and is used for removing oxygen; the mixed gas-phase hydrogen enters a refrigerator and is used for liquefying ethyl acetate therein, and after separating is conducted, liquefied ethyl acetate is poured into an ethyl acetate tank; the mixed gas-phase hydrogen is heated and then subjected to pressure swing adsorption, and pure hydrogen gas is obtained. Accordingly, the absolute ethyl alcohol serves as the raw material, the catalytic cracking reaction is carried out under the action of the catalyst, the hydrogen gas and the by-product ethyl acetate are generated, the raw material cost is low, and the product yield is large.The pure hydrogen gas is obtained through several times of separation and purification, and can be directly applied to a fuel cell.

Description

technical field [0001] The invention relates to the field of hydrogen preparation, in particular to a method and system for preparing hydrogen from ethanol. Background technique [0002] Hydrogen is one of the ideal clean energy sources in the future, and it is also an important chemical raw material. It is widely used in hydrogenation reactions (liquefaction and vaporization of coal, reforming of heavy oil, etc.), oxygen inhibitors, internal combustion engine fuels, and refrigerant manufacturing. If hydrogen is used directly as fuel, it can obtain higher efficiency than ordinary hydrocarbon fuels, and also has excellent performance of zero pollution emissions; when hydrogen is used in hydrogen-oxygen fuel cells, it can obtain up to 45%-60% of chemical energy - Electric energy conversion efficiency, while the heat engine efficiency of a general internal combustion engine is only 15%. In recent years, due to the breakthrough of proton exchange membrane fuel cell (PEMFC) tech...

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Problems solved by technology

However, the research on methanol-catalyzed hydrogen production has received extensive attention. Relatively speaking, the research on ethanol-catalyzed hydrogen production has not received enough attention and is very difficult. explore

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