Biogas, generally rich in CH4 and CO2, is one of the key to increase the share of renewable energy sources in total energy consumption. Different technologies are currently available for gas energy conversion but fuel cells are one of the most interesting because of their environmental benefits and their high potentiality. The high operating temperature of MCFC makes them particularly suitable for biogas use because CO is, not only harmfulness, but represents an additional fuel. Furthermore CH4 can be internally reformed. Biogas impurities such as sulfur compounds, cause adverse effects on cell performance. In particular hydrogen sulfide is harmful to the MCFC anode because nickel anodes react with H2S to form nickel sulfide which can block active electrochemical reaction sites. [1-3] The aim of this work is to study hydrogen sulfide effects on MCFC, establishing performance dependence on hydrogen sulfide concentration. Initial studies to reduce the degree of sulfur poisoning were carried out and some parameters like temperature, gas concentrations, mode of system operation were modified. [1] H.Devianto, S.P. Yoon, S.W. Nam, J. Han, T.-H. Lim, J.Power Sources 159 (2006) 1147. [2] M. Kawase, Y. Mugikura, T. Watanabe, J. Electochem. Soc. 147 (2000) 1240. [3] R. Bove, P.Lunghi, J.Power Sources 145 (2005) 588.

Bioenergy from fuel cells: effects of hydrogen sulfide impurities on performance of PEMFC fed with biogas / F., Zaza; C., Paoletti; R., LO PRESTI; E., Simonetti; Pasquali, Mauro. - (2008).

Bioenergy from fuel cells: effects of hydrogen sulfide impurities on performance of PEMFC fed with biogas.

PASQUALI, Mauro
2008

Abstract

Biogas, generally rich in CH4 and CO2, is one of the key to increase the share of renewable energy sources in total energy consumption. Different technologies are currently available for gas energy conversion but fuel cells are one of the most interesting because of their environmental benefits and their high potentiality. The high operating temperature of MCFC makes them particularly suitable for biogas use because CO is, not only harmfulness, but represents an additional fuel. Furthermore CH4 can be internally reformed. Biogas impurities such as sulfur compounds, cause adverse effects on cell performance. In particular hydrogen sulfide is harmful to the MCFC anode because nickel anodes react with H2S to form nickel sulfide which can block active electrochemical reaction sites. [1-3] The aim of this work is to study hydrogen sulfide effects on MCFC, establishing performance dependence on hydrogen sulfide concentration. Initial studies to reduce the degree of sulfur poisoning were carried out and some parameters like temperature, gas concentrations, mode of system operation were modified. [1] H.Devianto, S.P. Yoon, S.W. Nam, J. Han, T.-H. Lim, J.Power Sources 159 (2006) 1147. [2] M. Kawase, Y. Mugikura, T. Watanabe, J. Electochem. Soc. 147 (2000) 1240. [3] R. Bove, P.Lunghi, J.Power Sources 145 (2005) 588.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/190598
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