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Issue
Korean Journal of Chemical Engineering,
Vol.32, No.9, 1766-1773, 2015
High performance of manganese oxide octahedral molecular sieve adsorbents for removing sulfur compounds from fuel gas
Ho PH, Lee SC, Kim J, Lee D, Woo HC
Properties of porous manganese oxide adsorbents for adsorptive removal of tert-butylmercaptan (TBM) from CH4 fuel gas were investigated at ambient temperature and atmospheric pressure. The adsorbents were prepared by oxidation reactions of Mn2+ with KMnO4 and via the sol-gel method by reduction of KMnO4 using fumaric acid as the reducing agent. The effects of preparation method, precursor, temperature, and time for the structure and desulfurization properties of the resulting adsorbents were studied. Cryptomelane octahedral manganese oxide molecular sieve (OMS-2) adsorbents exhibited high breakthrough TBM adsorption (1.3-2.5mmol g.1) with the properties varied by the synthesis condition. The OMS-2-Ac prepared by the oxidation reactions of manganese acetate resulted in smaller OMS-2 crystallites with higher surface area compared to those prepared from manganese sulfate and chloride precursors, and it exhibited an enhanced TBM adsorption uptake. TBM adsorption capacity of OMS-2 could be further enhanced by introducing Cu into the structure. This gave rise to a markedly high TBM breakthrough adsorption (7.4mmol g.1) for Cu-OMS-2 (7.8 wt% Cu doping), which is significantly greater than the values reported for activated carbon, zeolite, and other porous oxide based solid adsorbents at similar conditions in the literature.
Keywords: Adsorptive Desulfurization; Manganese Oxide Molecular Sieve; Tert-Butylmercaptan; Fuel Processing; Fuel Cell
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[Cited By]
  1. Ho HP, Kasinathan P, Kim J, Lee D, Woo HC, Korean Journal of Chemical Engineering, 33(6), 1908, 2016
  2. Oh HW, Kim JM, Huh KS, Woo HC, Korean Chemical Engineering Research, 55(4), 567, 2017
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