Delphi Technologies, Inc.

Other

David R Schumann

Karl Jacob Haltiner, Jr

Malcolm James Grieve

Sean Michael Kelly

Kevin Richard Keegan

Michael Thomas Faville

Juergen T Kammerer

Haskell Simpkins

Subhasish Mukerjee

John E Kirwan

Galen Bruce Fisher

John G Noetzel

John F O'Brien

Harry L Husted

Donald J Armstrong

Ather A Quader

Christopher M DeMinco

M James Grieve

James Michael Haller

Amanda M Weiss

Steven R Shaffer

Catherine Vavonese

In a solid-oxide fuel cell system, a catalytic reformer unit provides reformate fuel for use by the cells in generating electricity. Both the reformer and the fuel cells require elevated temperatures for satisfactory operation. The reformer unit is provided with a combustion chamber and igniter ahead of the catalytic reformer plates such that, during start-up, fuel/air mixture normally destined for reformation may be ignited in the combustion chamber to provide a hot combustion exhaust which is fed through the catalytic reformer and the anode reformate flow spaces to assist in rapidly bringing the fuel cell system to operating temperature.

Solid-oxide fuel cell system having a fuel combustor to pre-heat reformer on start-up

A method for improving the efficiency of a hydrocarbon catalytic reformer and close-coupled fuel cell system by recycling a percentage of the anode exhaust syngas directly into the reformer in a range between about 20% and about 60%. Oxygen is supplied to the reformer at start-up. Under equilibrium conditions, oxygen required for reforming of hydrocarbon fuel is derived entirely from endothermic reforming of water and carbon dioxide in the recycled syngas. Recycling of anode syngas into the reformer increases fuel efficiency, adds excess water to the reformate to increase protection against anode coking, and protects the fuel cell stack against air- and water-borne contaminants. A method for producing an excess amount of syngas for exporting for other purposes is also provided.

Apparatus and method for operation of a high temperature fuel cell system using recycled anode exhaust

A process for removing contaminants from a reformer comprises removal of particulate matter under operating, or stand-by conditions, or at the start of a shutdown procedure, by introducing a gas mixture to the reformer system having an oxidant-to-fuel ratio concentration leaner than a normal oxidant-to-fuel ratio concentration and at a gas flow rate less than a peak flow rate. The process produces elevated temperatures at the reformer inlet and elevated levels of carbon dioxide and water that combine to remove the contaminants. Another embodiment includes removal of particulate matter during a shutdown procedure by cycling the flow of fuel and air on and off; monitoring an exit temperature of a catalyst substrate and alternatively, cycling the oxidant flow on and off when the exit temperature is less than or greater than a threshold temperature such that the exit temperature of the catalyst substrate is maintained below the temperature at which aging of the catalyst and/or a washcoat material may occur. These methods may be used individually or in combination to improve the durability and performance of the fuel reformer.

Reformer system process

An apparatus and method for a preheated micro-reformer system is disclosed comprising a reformer and a micro-reformer in fluid communication with the reformer. The micro-reformer being electrically preheatable. An apparatus comprising a micro-reformer including a first zone and a second zone, the first zone being preheatable to a first temperature and the second zone being preheatable to a second temperature, the second temperature being higher than the first temperature. A method of using a micro-reformer that is electrically preheatable is disclosed comprising initiating an electrically preheatable micro-reformer. The micro-reformer is preheated. The preheating can be accomplished by converting electrical energy into thermal energy. A method of using a preheated micro-reformer is disclosed comprising preheating a first zone, preheating a second zone to a temperature higher than the first zone, vaporizing a fuel air mixture in the first zone, and reforming the fuel air mixture in the second zone.

Method and apparatus for preheating of a fuel cell micro-reformer

A solid-oxide fuel cell system including an integrated reforming unit comprising a hydrocarbon fuel reformer; an integral tail gas and cathode air combustor and reformer heat exchanger; a fuel pre-heater and fuel injector cooler; a fuel injector and fuel/air mixer and vaporizer; a reforming air pre-heating heat exchanger; a reforming air temperature control valve and means; and a pre-reformer start-up combustor. The integration of a plate reformer, tail gas combustor, and combustor gas heat exchanger allows for efficient operation modes of the reformer, both endothermic and exothermic as desired. The combustor gas heat exchanger aids in temperature regulation of the reformer and reduces significant thermal gradients in the unit.

Solid-oxide fuel cell system having an integrated reformer and waste energy recovery system

A method of starting a solid oxide fuel cell system is disclosed. The method comprises pressurizing a main plenum to a first pressure. The main plenum comprises a first supply of fuel, blowers, and air control valves. The first supply of fuel and a first supply of air are directed to a preheated micro-reformer. A heated pre-reformate is created in the micro-reformer and discharged from the micro-reformer to a main reformer. The main reformer is preheated with the heated pre-reformate. A second supply of fuel and a second supply of air are introduced to the main reformer. A heated main reformate is created in the main reformer and directed to a waste energy recovery assembly. A cathode supply is heated in the waste energy recovery system and then directed to a solid oxide fuel cell stack in order to heat the solid oxide fuel cell stack. Methods of transitioning, operating, shutting down, and maintaining in standby mode are also disclosed. A solid oxide fuel cell mechanization for a transportation vehicle is also disclosed.

Integrated solid oxide fuel cell mechanization and method of using for transportation industry applications

Growing community of inventors

Spencerport, NY, United States of America

David R Schumann