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Title: Method of generating hydrogen gas from sodium borohydride

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.

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

Citation Formats

Kravitz, Stanley H., Hecht, Andrew M., Sylwester, Alan P., and Bell, Nelson S. Method of generating hydrogen gas from sodium borohydride. United States: N. p., 2007. Web.
Kravitz, Stanley H., Hecht, Andrew M., Sylwester, Alan P., & Bell, Nelson S. Method of generating hydrogen gas from sodium borohydride. United States.
Kravitz, Stanley H., Hecht, Andrew M., Sylwester, Alan P., and Bell, Nelson S. Tue . "Method of generating hydrogen gas from sodium borohydride". United States. doi:. https://www.osti.gov/servlets/purl/921027.
@article{osti_921027,
title = {Method of generating hydrogen gas from sodium borohydride},
author = {Kravitz, Stanley H. and Hecht, Andrew M. and Sylwester, Alan P. and Bell, Nelson S.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Dec 11 00:00:00 EST 2007},
month = {Tue Dec 11 00:00:00 EST 2007}
}

Patent:

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  • A hydrocarbon fuel is subjected to combustion in an internal combustion engine by the use of excess air, and the exhaust gas is utilized as heat and oxygen sources for partial oxidation of the hydrocarbon fuel in a separate reformer. A resulting mixture of the reformed gas and the exhaust gas is subjected to heat exchange with air to be drawn into the engine and/or the fuel to be supplied to the reformer and thereafter is supplied to a larger internal combustion engine.
  • This patent describes an apparatus and a method for generating hydrogen gas for use as a fuel additive in diesel engines. The method for improving the fuel economy and emission quality of a diesel engine consists of: delivering water from a pressurized water source to the water inlet of a heat exchanger at a controlled rate determined responsive to the delivery of diesel fuel to the diesel engine; collecting the hot exhaust gases from the diesel engine and delivering them to the exhaust gas inlet of the heat exchanger; separating the exhaust gases into tubes or pipes extending through themore » heat exchanger and having heat conducting walls; spraying water through the water inlet onto the surface of the heat conducting walls at such a rate as to reform the atomized water droplets into hydrogen gas, oxygen gas, and water vapor; the ratio of water delivered to the heat exchanger relative to diesel fuel delivered to the combustion chamber of the diesel engine being substantially in the range of 1:10 to 1:20; delivering the hydrogen gas, oxygen gas, and water vapor to the air intake of the diesel engine where it is mixed with air, introduced into the combustion chamber, and compressed prior to the introduction of the diesel fuel for combustion. The apparatus for generating and delivering a mixture of hydrogen gas, oxygen gas, and steam for mixture with diesel fuel in the combustion chamber of a diesel engine consists of a pressurized source of water; a heat exchanger having means associated therewith for receiving water from the water source and exhaust gases from the diesel engine in non-contacting, heat exchange relation to each other; means for controlling the flow of water to the heat exchanger responsive to the delivery rate of diesel fuel to the combustion chamber of the diesel engine; means connecting the interior of the heat exchange compartment with the combustion chamber for circulating air through the heat exchange compartment and on to the combustion chamber.« less
  • 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 tomore » 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.« less
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