1
Denis J Connor, Bowie G Keefer, Christopher R McLean, Shanna D Knights, Jean St Pierre: Methods and apparatuses for gas separation by pressure swing adsorption with partial gas product feed to fuel cell power source. QuestAir Technologies, Klarquist Sparkman, March 15, 2005: US06866950 (76 worldwide citation)

Various systems, method and apparatuses are disclosed that include a pressure swing adsorption apparatus coupled to a fuel cell, wherein the fuel cell receives at least a portion of a product gas from the pressure swing adsorption and powers the pressure swing adsorption apparatus. Also disclosed is ...


2
Joy A Roberts, Jean St Pierre, Marian E van der Geest, Abderrahmane Atbi, Nicholas J Fletcher: Method for improving the cold starting capability of an electrochemical fuel cell. Ballard Power Systems, McAndrews Held & Malloy, November 12, 2002: US06479177 (44 worldwide citation)

A method of ceasing operation of an electric power generation system improves the cold start capability and freeze tolerance of a fuel cell stack by reducing the amount of water remaining within the passages of the stack. The method involves purging one or more of the fuel cell stack oxidant and fue ...


3
Kevin Michael Colbow, Marian van der Geest, Cindy J Longley, Jens Müller, Joy Roberts, Jean St Pierre, Peter Urban, Regina Wezel, David P Wilkinson, Jiujun Zhang: Method and apparatus for operating an electrochemical fuel cell with periodic reactant starvation. Ballard Power Systems, McAndrews Held & Malloy, October 29, 2002: US06472090 (28 worldwide citation)

An electrochemical fuel cell is operated with periodic reactant starvation at either or both electrodes. Periodic reactant starvation conditions cause a change in the potential of the starved electrode and may result in the removal of electrocatalyst poisons and in improved fuel cell performance. Th ...


4
David P Wilkinson, Clarence Y F Chow, Derek E Allan deceased, by Patricia Joanne Allan administrator, Erik P Johannes, Joy A Roberts, Jean St Pierre, Cindy J Longley, John K K Chan: Method and apparatus for operating an electrochemical fuel cell with periodic fuel starvation at the anode. Ballard Power Systems, McAndrews Held & Malloy, August 1, 2000: US06096448 (25 worldwide citation)

A method and apparatus is provided for operating an electrochemical fuel cell with periodic momentary fuel starvation at the anode. It is believed that such momentary periodic fuel starvation conditions cause the anode potential to increase, resulting in the oxidation and removal of electrocatalyst ...


5
Joy Roberts, Marian van der Geest, Jean St Pierre, David P Wilkinson, Alvin Lee, Stephanie Moroz: Method and apparatus for increasing the temperature of a fuel cell. Ballard Power Systems, McAndrews Held & Malloy, December 11, 2001: US06329089 (22 worldwide citation)

A method and apparatus increase the temperature of a fuel cell via reactant starvation at one or both electrodes. Reactant starvation at an electrode results in an increased overvoltage at the electrode and hence increased internal heat generation under load. Starvation conditions can be prolonged o ...


6
Jean St Pierre, David P Wilkinson, David S Wainwright: Integrated fuel cell and pressure swing adsorption system. Ballard Power Systems, McAndrews Held & Malloy, September 30, 2003: US06627338 (21 worldwide citation)

An integrated fuel cell and pressure swing adsorption system is disclosed for operating a solid polymer fuel cell on an enriched reactant stream. The fuel and/or oxidant streams may be enriched; for example, air and reformate streams may be oxygen and hydrogen enriched, respectively. The system may ...


7
Bowie G Keefer, Surajit Roy, Jean St Pierre, Amy E Nelson, Shanna D Knights: Power plant with energy recovery from fuel storage. G4 Insights, Klarquist Sparkman, September 13, 2011: US08015808 (20 worldwide citation)

Power plant systems and processes are described that enable recovery of at least a portion of the fuel storage energy associated with a storage system for supplying fuel to the power plant systems. A first embodiment of an energy-recovery power plant system includes at least one fuel storage contain ...


8
Werner Tillmetz, David P Wilkinson, Kevin M Colbow, Jean St Pierre: Fuel cell system with improved starting capability. Ballard Power Systems, McAndrews Held & Malloy, June 25, 2002: US06410175 (11 worldwide citation)

A method of commencing operation of a fuel cell system which includes a fuel reformer is provided. During a start-up period, the same fuel which is used in the feedstock to the reformer is directed to at least a portion of the fuel cells in the system. These fuel cells provide output power by direct ...


9
David P Wilkinson, Bien Hung Chiem, Joy A Roberts, Jean St Pierre, Jürgen Stumper, Joerg Zimmermann: Method and apparatus for controlling the temperature within an electrochemical fuel cell. Ballard Power Systems, McAndrews Held & Malloy, January 27, 2004: US06682839 (7 worldwide citation)

A method of controlling the temperature within an electrochemical fuel cell stack comprises introducing a reactant fluid stream comprising both a heat transfer liquid and a reactant into a fuel cell assembly such that the reactant fluid stream contacts an electrode. The heat transfer liquid is other ...


10
Jean St Pierre, NengYou Jia, Marian Van Der Geest, Abderrahmane Atbi, Herwig R Haas: Methods and apparatus for improving the cold starting capability of a fuel cell. Ballard Power Systems, Seed IP Law Group PLLC, November 7, 2006: US07132179 (4 worldwide citation)

Apparatus and methods of ceasing operation of an electric power generating system improve the cold starting capability of the system. The system comprises a fuel cell stack connectable to an external circuit for supplying power to the external circuit. The stack comprises at least one solid polymer ...