TY - GEN
T1 - "Fan the flame with water". Current ignition and front propagation in pem fuel cells
AU - De Decker, Yannick
AU - Benziger, Jay B.
AU - Kevrekidis, Yannis G.
PY - 2006
Y1 - 2006
N2 - Polymer Electrolyte Membrane (PEM) fuel cells exhibit complex non-linear dynamics resulting from an exponential When the membrane water content was greater than a critical value the fuel cell current increased to a high value corresponding to an ignited state. The fuel cell current can be ignited by injection of water into the fuel cell; this hydrates the membrane which increases the current and autohumidifies the fuel cell. Spatio-temporal dynamics have been followed in the flow channels of a PEM fuel cell reactor. Co-current flow of the hydrogen and oxygen results in current ignition at the outlet of the flow channel, followed by a wave of high current density propagating toward the inlet. Counter-current flow of the hydrogen and the oxygen results in ignition at the center of the flow channels. A beautiful analogy can be drawn between water production and removal in a PEM fuel cell and heat production and removal in exothermic chemical reactors. This is an abstract of a paper presented at the AIChE Annual Meeting (San Francisco, CA 11/12-17/2006).
AB - Polymer Electrolyte Membrane (PEM) fuel cells exhibit complex non-linear dynamics resulting from an exponential When the membrane water content was greater than a critical value the fuel cell current increased to a high value corresponding to an ignited state. The fuel cell current can be ignited by injection of water into the fuel cell; this hydrates the membrane which increases the current and autohumidifies the fuel cell. Spatio-temporal dynamics have been followed in the flow channels of a PEM fuel cell reactor. Co-current flow of the hydrogen and oxygen results in current ignition at the outlet of the flow channel, followed by a wave of high current density propagating toward the inlet. Counter-current flow of the hydrogen and the oxygen results in ignition at the center of the flow channels. A beautiful analogy can be drawn between water production and removal in a PEM fuel cell and heat production and removal in exothermic chemical reactors. This is an abstract of a paper presented at the AIChE Annual Meeting (San Francisco, CA 11/12-17/2006).
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M3 - Conference contribution
AN - SCOPUS:58049110009
SN - 081691012X
SN - 9780816910120
T3 - AIChE Annual Meeting, Conference Proceedings
BT - 2006 AIChE Annual Meeting
T2 - 2006 AIChE Annual Meeting
Y2 - 12 November 2006 through 17 November 2006
ER -