METHOD FOR PRODUCING HIGHLY PURE HYDROGEN BY COUPLING PYROLYSIS OF HYDROCARBONS WITH ELECTROCHEMICAL HYDROGEN SEPARATION
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United States of America
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Oct 15, 2020
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Oct 15, 2020
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Abstract
The present invention comprises a process for producing hydrogen, wherein in a first stage hydrocarbons are decomposed into solid carbon and into a hydrogen-containing gaseous product mixture, the hydrogen-containing gaseous product mixture, which has a composition in respect of the main components CH4, N2, and H2 of 20% to 95% by volume H2 and 80% to 5% by volume CH4 and/or N2, is discharged from the first stage at a temperature of 50 to 300° C., and this is supplied at a temperature differing from this exit temperature by not more than 100° C. to an electrochemical separation process and, in this second stage, the hydrogen-containing product mixture is separated in the electrochemical separation process at a temperature of 50 to 200° C. into hydrogen having a purity of >99.99% and a remaining residual gas mixture.
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