Chemistry: electrical current producing apparatus – product – and – Having magnetic field feature
Reexamination Certificate
2007-02-27
2007-02-27
Ryan, Patrick Joseph (Department: 1745)
Chemistry: electrical current producing apparatus, product, and
Having magnetic field feature
C429S010000, C429S006000
Reexamination Certificate
active
10432183
ABSTRACT:
In a direct-methanol fuel cell stack with an at least partial circulation (7, 9) of the fuel, according to the invention a means is arranged in this circulation for reducing the concentration of an undesired byproduct. This means is comprised especially of a further electrochemical cell (8) to which electric current is applied and which at least partly transforms the byproducts by an electrochemical reduction reaction again to methanol and water. Since the concentration of byproducts is small, the loss in electric current required for the additional reduction reaction has no noticeable effect on the efficiency of the fuel cell stack.
REFERENCES:
patent: 3653969 (1972-04-01), Titterington et al.
patent: 5904740 (1999-05-01), Davis
patent: 6280865 (2001-08-01), Eisman et al.
patent: 03043964 (1991-02-01), None
patent: WO 00/16425 (2000-03-01), None
Baltruschat Helmut
Dohle Hendrik
Mergel Jürgen
Stolten Detlef
Forschungszentrum Julich GmbH
Hodge Robert
Myers Jonathan
Ryan Patrick Joseph
Wilford Andrew
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