Liquid hydrogen production via hydrogen sulfide methane reformation

    Authors

    C. P. Huang;A. T-Raissi

    Comments

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    Abbreviated Journal Title

    J. Power Sources

    Keywords

    hydrogen sulfide; hydrogen sulfide methane reformation; cryogenic; separation; liquid hydrogen production; QUALITY NATURAL-GAS; ELECTROCHEMICAL PROCESS; THERMODYNAMIC ANALYSES; CONVERSION; SULFUR; Electrochemistry; Energy & Fuels

    Abstract

    Hydrogen sulfide (H2S) methane (CH4) reformation (H2SMR) (2H(2)S + CH4 = CS2 + 4H(2)) is a potentially viable process for the removal of H2S from sour natural gas resources or other methane containing gases. Unlike steam methane reformation that generates carbon dioxide as a by-product, H2SMR produces carbon disulfide (CS2), a liquid under ambient temperature and pressure-a commodity chemical that is also a feedstock for the synthesis of sulfuric acid. Pinch point analyses for H2SMR were conducted to determine the reaction conditions necessary for no carbon lay down to occur. Calculations showed that to prevent solid carbon formation, low inlet CH4 to H2S ratios are needed. In this paper, we analyze H2SMR with either a cryogenic process or a membrane separation operation for production of either liquid or gaseous hydrogen. Of the three H2SMR hydrogen production flowsheets analyzed, direct liquid hydrogen generation has higher first and second law efficiencies of exceeding 80% and 50%, respectively. (C) 2007 Elsevier B.V. All rights reserved.

    Journal Title

    Journal of Power Sources

    Volume

    175

    Issue/Number

    1

    Publication Date

    1-1-2008

    Document Type

    Article

    Language

    English

    First Page

    464

    Last Page

    472

    WOS Identifier

    WOS:000252513100059

    ISSN

    0378-7753

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