Mixed proton conducting membranes

Tab. 2.4 Comparison of hydrogen flux through various nonporous mixed proton conducting membranes at 900°C.

Reprinted from M.L. Di Vona, Z. Ahmed, S. BeUitto, A. Lenci, E. Traversa, S. Licoccia, SPEEK-Ti02 nanocomposite hybrid proton conductive membranes via in situ mixed sol-gel process, Journal of Membrane Science 296 (2007) 156-161. 

Key words membrane reactor, perovskite, proton conducting membrane, mixed ionic-electronic conductor (MIEC), partial oxidation of methane... 

Between any two bipolar plates providing reactant access, a multilayer MEA is set up that consists of a positive electrode and a negative electrode pressed into the two sides of a proton-conducting membrane. For reasons discussed in Section 3.4, the catalyst for the hydrogen electrode in a PEMFC is a mixed platinum-ruthenium catalyst that applied to carbon black. The overall thickness of a modem MEA is about 0.5 to 0.6 mm (of which approximately 0.1 mm each is for the membrane, the two gas-diffusion layers, and the two active layers). The bipolar plates are about 1.5 mm thick, with the channels on both sides having a depth of about 0.5 mm. 

Key words membrane reactors, mixed ionic-electronic conductors (MIECs), perovskite, oxygen permeable membrane, proton conducting membrane. 

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