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Nanoclays as nano adsorbent for oxidation of H_2S into elemental sulfur
Ali Mohamadalizadeh,Jafar Towfighi,Alimorad Rashidi,Mehrdad Manteghian,Ali Mohajeri,Rohollah Arasteh 한국화학공학회 2011 Korean Journal of Chemical Engineering Vol.28 No.5
Modified bentonites were used for the oxidation of H_2S into elemental sulfur. Active phases such as iron and cobalt sulfide were added to supports Cloisite 30B and 15A. The produced nano adsorbents were characterized by X-Ray diffraction, ICP, BET surface area and SEM. Selective oxidation of H_2S was carried out over the nano adsorbent in the experimental setup. The tests were performed at 70 and 180℃, under atmospheric pressure and in the presence of 5,000 ppm of H_2S in the inlet gas stream. The results confirmed the increase in the distribution of active metals and activity of Cloisite 30B, in comparison with Cloisite 15A. Cobalt-containing support showed significant improvement in the capacity of H_2S removal, and in the outlet stream less than 50 ppm of H_2S was detected.