BARBA, DANIELA

CIAMBELLI, Paolo

PALMA, Vincenzo

English

Archivio della Ricerca - Università di Salerno

Catalysts for H2S abatement from biogas to feed MCFCV. Palmaa, D. Barbaa, P. CiambelliaaDepartment of Industrial Engineering of the University of Salerno, Via Ponte Don Melillo, Fisciano (SA), Italye-mail: vpalma@unisa.itOne of the most interesting application of biogas is linked to the energy production by MCFC.The main problem of biogas application in energy production by fuel cells is due to the presence of the sulphur compounds, usually at level of hundred of ppm, that represents a serious poisoning problem of the cells anode and electrolyte. For this reasons, it is very important to reduce the H2S concentrations at values about 1-5 ppm.In this regard, a very effective and promising solution is represented by the catalytic reaction of the selective partial oxidation of H2S to sulphur and water performed at very low temperatures (50-250°C), where, any significant  thermodynamic limitations are showed. This problem maybe solved if an active and selective catalyst is allowable.The aim of this work is to prepare and characterize new catalysts, for the selective for the low temperature H2S oxidation to sulphur.In a previous work different catalysts1 (activated carbon, mixed metal oxides) were investigated in the reaction of H2S oxidation to sulphur. Preliminary results showed that the mixed metal oxide performs better than activated carbon in terms of both catalytic activity and selectivity. In this work vanadium based catalysts supported on ceria, titania, alumina and copper ferrite was prepared by wet impregnation method. The samples were compared in terms of H2S and O2 conversion, SO2 selectivity and durability in the range of temperature of 50-250°C.The most interesting catalysts were V2O5/CeO2 and V2O5/CuFe2O4 that showed very high H2S conversion, higher than 95% and respectively a SO2 selectivity of 4% and 20%.On this promising samples a deeper study of catalytic performances were performed by investigating the influence of the O2/H2S molar feed ratio, H2S concentrations, and space velocity, in order to obtain preliminary kinetic data that are fundamental importance to the correct design of a catalytic reactor for the biogas clean-up to feed MCFC.[1] V.Palma, E.Palo, P.Ciambelli, “H2S removal from a biogas stream fed to molten carbonate fuel cells , ISCRE 21, 21st International Symposium on Chemical Reaction Engineering 13-16 June 2010 -Philaldelphia (USA).

Catalysts for H2S abatement from biogas to feed MCFC

https://www.iris.unisa.it/bitstream/11386/3094015/1/abstract%20SCI.doc

Catalysts for H2S abatement from biogas to feed MCFC

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