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Desulfurization of Sulfur Compounds in City-gas using Metal Salt Impregnated Zeolite  

Song, Hirn-Ill (Chemical Process Research Center, Korea Institute of Energy Research)
Ko, Chang Hyun (Chemical Process Research Center, Korea Institute of Energy Research)
Kim, Jae Chang (Department of Chemical Engineering, Kyungpook National University)
Kim, Jong-Nam (Chemical Process Research Center, Korea Institute of Energy Research)
Publication Information
Korean Chemical Engineering Research / v.45, no.2, 2007 , pp. 143-148 More about this Journal
Abstract
In hydrogen production for fuel cell by reforming city-gas, sulfur compounds, odorant in city-gas, are detrimental to reforming catalyst and fuel cell electrodes. We prepared metal salt impregnated ${\beta}-zeolite(BEA)$ to remove sulfur compound in city-gas by adsorption. The sulfur breakthrough adsorption capacity was changed depending on the concentration and species of metal salt. $AgNO_3$ impregnated BEA showed the highest sulfur breakthrough capacity among adsorbents used in this experiment(41.1 mg/g). But metal salt impregnated BEA such as $Ni(NO_3)_2/BEA$, $Fe(NO_3_)_3/BEA$, $Co(NO_3)_2/BEA$ showed a certain amount of sulfur adsorption capacity comparable to $AgNO_3/BEA$. Adsorption temperature effect, desorption study, and x-ray photoelectron spectroscopy analysis revealed that the dominant interaction between metal impregnated adsorbent and sulfur compounds was not chemisorption but physisorption.
Keywords
Desulphurization; City-Gas; $\beta-Zeolite$; Adsorption; THT; TBM;
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