Direct methanol oxidation polymer electrolyte membrane power sys

Details Direct methanol oxidation polymer electrolyte membrane power sys Direct methanol oxidation polymer electrolyte membrane power sys

1995-05-08

1996-11-12

Tung, T.

Chemistry: electrical current producing apparatus, product, and

Having magnetic field feature

429 14, 429 40, 429 30, H01M 810, H01M 802, H01M 804

Patent

active

055738664

ABSTRACT:
A polymer electrolyte membrane fuel cell includes an anode chamber and a cathode chamber which are separated by the electrolyte membrane. The fuel cell directly oxidizes a liquid methanol fuel which is fed into the anode chamber from a liquid methanol storage container. The liquid methanol is mixed with water in the anode chamber, and the mixture passes into and through the electrolyte membrane. Some of the methanol and water pass through the membrane into the cathode chamber and into a process air stream which moves through the cathode chamber. The methanol and water are removed from the cathode chamber by evaporation into the process air stream, which then is directed into a condenser/radiator. The methanol and water vapors are condensed in the condenser/radiator, from whence the condensed water and methanol are returned to the anode chamber of the cell. The evaporating cathode process air stream provides oxygen for the fuel cell reaction, and also cools the cell.

REFERENCES:
patent: 3425873 (1969-02-01), Worsham et al.
patent: 3514335 (1970-05-01), Grubb
patent: 3556857 (1971-01-01), Poirier et al.
patent: 4040435 (1977-08-01), Elzinga
Bittins-Cattaneo et al., J. Appl. Electrochem. 23 (1993)*, 625-630 1993.

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