Method of manufacturing micro-disperse particles of sodium...

Details Method of manufacturing micro-disperse particles of sodium... Method of manufacturing micro-disperse particles of sodium...

2007-06-08

2008-09-23

Langel, Wayne (Department: 1793)

Chemistry: physical processes

Physical processes

Crystallization

C023S30200R

Reexamination Certificate

active

07427302

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: 2856274 (1958-10-01), Vetrano et al.
patent: 3222120 (1965-12-01), Del Giudice
patent: 5370853 (1994-12-01), Schnick et al.
patent: 2003/0114632 (2003-06-01), Ortega et al.

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