Method of generating hydrogen gas from sodium borohydride

Details Method of generating hydrogen gas from sodium borohydride Method of generating hydrogen gas from sodium borohydride

2007-12-11

2007-12-11

Langel, Wayne A. (Department: 1754)

Chemistry of inorganic compounds

Hydrogen or compound thereof

Elemental hydrogen

C423S279000, C423S280000, C429S010000

Reexamination Certificate

active

10830989

ABSTRACT:
A compact solid source of hydrogen gas, where the gas is generated by contacting water with micro-disperse particles of sodium borohydride in the presence of a catalyst, such as cobalt or ruthenium. The micro-disperse particles can have a substantially uniform diameter of 1-10 microns, and preferably about 3-5 microns. Ruthenium or cobalt catalytic nanoparticles can be incorporated in the micro-disperse particles of sodium borohydride, which allows a rapid and complete reaction to occur without the problems associated with caking and scaling of the surface by the reactant product sodium metaborate. A closed loop water management system can be used to recycle wastewater from a PEM fuel cell to supply water for reacting with the micro-disperse particles of sodium borohydride in a compact hydrogen gas generator. Capillary forces can wick water from a water reservoir into a packed bed of micro-disperse fuel particles, eliminating the need for using an active pump.

REFERENCES:
patent: 6358488 (2002-03-01), Suda
patent: 6534033 (2003-03-01), Amendola et al.
patent: 2003/0157018 (2003-08-01), Zaluski et al.

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