skip to main content

Title: Method of generating hydrogen gas from sodium borohydride

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.
Authors:
 [1] ;  [2] ;  [3] ;  [3]
  1. (Placitas, NM)
  2. (Sandia Park, NM)
  3. (Albuquerque, NM)
Publication Date:
OSTI Identifier:
921027
Report Number(s):
7,306,780
US patent application 10/830,989
DOE Contract Number:
AC04-94AL85000
Resource Type:
Patent
Research Org:
Sandia Corporation (Albuquerque, NM)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English