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    Influence of Mineral Composition of Chars Derived by Hydrothermal Carbonization on Sorption Behavior of CO2, CH4, and O2.

    79703.pdf (1.859Mb)
    Access Status
    Open access
    Authors
    Wedler, Carsten
    Lotz, Katrin
    Arami-Niya, Arash
    Xiao, Gongkui
    Span, Roland
    Muhler, Martin
    May, Eric F
    Richter, Markus
    Date
    2020
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Wedler, C. and Lotz, K. and Arami-Niya, A. and Xiao, G. and Span, R. and Muhler, M. and May, E.F. et al. 2020. Influence of Mineral Composition of Chars Derived by Hydrothermal Carbonization on Sorption Behavior of CO2, CH4, and O2. ACS Omega. 5 (19): pp. 10704-10714.
    Source Title
    ACS Omega
    DOI
    10.1021/acsomega.9b04370
    ISSN
    2470-1343
    Faculty
    Faculty of Science and Engineering
    School
    WASM: Minerals, Energy and Chemical Engineering
    Remarks

    This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Omega, copyright © American Chemical Society, after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acsomega.9b04370.

    URI
    http://hdl.handle.net/20.500.11937/79621
    Collection
    • Curtin Research Publications
    Abstract

    The doping of SiO2 and Fe2O3 into hydrochars that were produced by the hydrothermal carbonization of cellulose was studied with respect to its impact on the resulting surface characteristics and sorption behavior of CO2, CH4, and O2. During pyrolysis, the structural order of the Fe-doped char changed, as the fraction of highly ordered domains increased, which was not observed for the undoped and Si-doped chars. The Si doping had no apparent influence on the oxidation temperature of the hydrochar in contrast to the Fe-doped char where the oxidation temperature was reduced because of the catalytic effect of Fe. Both dopants reduced the micro-, meso- and macroporous surface areas of the chars, although the Fe-doped chars had larger meso- and macroporosity than the Si-doped char. However, the increased degree in the structural order of the carbon matrix of the Fe-doped char reduced its microporosity relative to the Si-doped char. The adsorption of CO2 and CH4 on the chars at temperatures between 273.15 and 423.15 K and at pressures up to 115 kPa was slightly inhibited by the Si doping but strongly suppressed by the Fe doping. For O2, however, the Si doping promoted the observed adsorption capacity, while Fe doping also showed an inhibiting effect.

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