TY - GEN
T1 - Mathematical modeling and steady-state analysis of a co-ionic-conducting solid oxide fuel cell
AU - Bavarian, Mona
AU - Soroush, Masoud
AU - Kevrekidis, Ioannis G.
AU - Benziger, Jay B.
PY - 2012
Y1 - 2012
N2 - A mathematical model of a solid oxide fuel cell (SOFC) with a BaCe 1xSmxO3α type electrolyte is developed. This class of electrolytes exhibits both proton and oxygen-anion conductivity. To develop the model, heat transfer, mass transfer and electrochemical processes are taken into account. The existence of steady-state multiplicity in this class of fuel cells is investigated under three operation modes: constant ohmic load, potentiostatic and galavanostatic. The cell has up to three steady states under the constant ohmic load and potentiostatic modes, and a unique steady state under the galvanostatic mode. This same steady state behavior has been observed in oxygen-anion conducting and proton conducting SOFCs. Interestingly, this study shows that in this class of SOFCs, thermal and concentration multiplicities can coexist; ignition in the solid temperature is accompanied by extinction in the fuel and oxygen concentrations, and ignition and extinction in concentrations of water in the anode and cathode sides, respectively.
AB - A mathematical model of a solid oxide fuel cell (SOFC) with a BaCe 1xSmxO3α type electrolyte is developed. This class of electrolytes exhibits both proton and oxygen-anion conductivity. To develop the model, heat transfer, mass transfer and electrochemical processes are taken into account. The existence of steady-state multiplicity in this class of fuel cells is investigated under three operation modes: constant ohmic load, potentiostatic and galavanostatic. The cell has up to three steady states under the constant ohmic load and potentiostatic modes, and a unique steady state under the galvanostatic mode. This same steady state behavior has been observed in oxygen-anion conducting and proton conducting SOFCs. Interestingly, this study shows that in this class of SOFCs, thermal and concentration multiplicities can coexist; ignition in the solid temperature is accompanied by extinction in the fuel and oxygen concentrations, and ignition and extinction in concentrations of water in the anode and cathode sides, respectively.
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U2 - 10.1109/acc.2012.6314973
DO - 10.1109/acc.2012.6314973
M3 - Conference contribution
AN - SCOPUS:84869450982
SN - 9781457710957
T3 - Proceedings of the American Control Conference
SP - 4269
EP - 4274
BT - 2012 American Control Conference, ACC 2012
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2012 American Control Conference, ACC 2012
Y2 - 27 June 2012 through 29 June 2012
ER -