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Thermodynamics of HCl and HF Interferences in Hot Producer Gas Desulfurization by Zinc, Cerium and Lanthanum Oxide Based Sorbents

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    0446236 - ÚCHP 2016 FR eng C - Konferenční příspěvek (zahraniční konf.)
    Svoboda, Karel - Hartman, Miloslav - Havlica, Jaromír - Leitner, J. - Pohořelý, Michael - Šyc, Michal - Chen, P.-Ch.
    Thermodynamics of HCl and HF Interferences in Hot Producer Gas Desulfurization by Zinc, Cerium and Lanthanum Oxide Based Sorbents.
    Abstracts-book. -: -, 2015 - (ScienceKNOW Conferences C.B.), s. 202. ISBN 978-84-944311-1-1.
    [International Conference on Chemical and Biochemical Engineering. Paris-Saint Denis (FR), 20.07.2015-22.07.2015]
    Grant ostatní:NSC(TW) 103-2923-E-042A-001-MY3
    Institucionální podpora: RVO:67985858
    Klíčová slova: gas cleaning * thermodynamics * Ce2O3, La2O3 sorbent
    Kód oboru RIV: CI - Průmyslová chemie a chemické inženýrství

    The thermodynamic analyses are focused on the determination of theoretical equilibrium concentrations of HCl and HF for ZnO, La2O3, and CexOy-based sulfur compounds sorbents and on the interferences of hydrogen halides in H2S removal in the temperature range 600 – 1000 K. The ZnO, La2O3 and Ce2O3-based sorbents are comparable in equilibrium H2S concentrations. The lowest H2S concentration, even below 0.1 ppm-v can be attained by Ce2O3-based sorbents (formation of Ce2O2S). The prevention of oxidation of the Ce2O3-based sorbents to less efficient CeO2 is important. Our results confirm that the ZnO-based sorbents are relatively insensitive to the presence of HCl and HF in producer gas (up to hundreds of ppm-v). The La2O3-based sorbents of sulfur compounds are sensitive to HCl and HF concentrations in gas. Ce2O3-based sorbents are less affected by presence of HCl.
    Trvalý link: http://hdl.handle.net/11104/0248214
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