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Effect of hydrogen sulfide on chemical looping combustion of coal-derived synthesis gas over bentonite-supported metal−oxide oxygen carriers / Hanjing Tian in Industrial & engineering chemistry research, Vol. 48 N° 18 (Septembre 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 18 (Septembre 2009) . - pp. 8418–8430 Titre : Effect of hydrogen sulfide on chemical looping combustion of coal-derived synthesis gas over bentonite-supported metal−oxide oxygen carriers Type de document : texte imprimé Auteurs : Hanjing Tian, Auteur ; Thomas Simonyi, Auteur ; James Poston, Auteur Année de publication : 2010 Article en page(s) : pp. 8418–8430 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Hydrogen  sulfide  Coal-derived  synthesis  gas  Chemical  looping  combustionBentonite Résumé : The effect of hydrogen sulfide (H2S) on the chemical looping combustion of coal-derived synthesis gas with bentonite-supported metal oxides—such as iron oxide, nickel oxide, manganese oxide, and copper oxide—was investigated by thermogravimetric analysis, mass spectrometry, and X-ray photoelectron spectroscopy (XPS). During the reaction with synthesis gas containing H2S, metal−oxide oxygen carriers were first reduced by carbon monoxide and hydrogen, and then interacted with H2S to form metal sulfide, which resulted in a weight gain during the reduction/sulfidation step. The reduced/sulfurized compounds could be regenerated to form sulfur dioxide and oxides during the oxidation reaction with air. The reduction/oxidation capacities of iron oxide and nickel oxide were not affected by the presence of H2S, but both manganese oxide and copper oxide showed decreased reduction/oxidation capacities. However, the rates of reduction and oxidation decreased in the presence of H2S for all four metal oxides. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900638p [article] Effect of hydrogen sulfide on chemical looping combustion of coal-derived synthesis gas over bentonite-supported metal−oxide oxygen carriers [texte imprimé] / Hanjing Tian, Auteur ; Thomas Simonyi, Auteur ; James Poston, Auteur . - 2010 . - pp. 8418–8430. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 18 (Septembre 2009) . - pp. 8418–8430 Mots-clés : Hydrogen  sulfide  Coal-derived  synthesis  gas  Chemical  looping  combustionBentonite Résumé : The effect of hydrogen sulfide (H2S) on the chemical looping combustion of coal-derived synthesis gas with bentonite-supported metal oxides—such as iron oxide, nickel oxide, manganese oxide, and copper oxide—was investigated by thermogravimetric analysis, mass spectrometry, and X-ray photoelectron spectroscopy (XPS). During the reaction with synthesis gas containing H2S, metal−oxide oxygen carriers were first reduced by carbon monoxide and hydrogen, and then interacted with H2S to form metal sulfide, which resulted in a weight gain during the reduction/sulfidation step. The reduced/sulfurized compounds could be regenerated to form sulfur dioxide and oxides during the oxidation reaction with air. The reduction/oxidation capacities of iron oxide and nickel oxide were not affected by the presence of H2S, but both manganese oxide and copper oxide showed decreased reduction/oxidation capacities. However, the rates of reduction and oxidation decreased in the presence of H2S for all four metal oxides. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900638p