Westport Power Inc.

Paul Sebright Towgood

Andre Boulet

Xuantian Li

Jacobus Neels

Erik Paul Johannes

Christopher Gordon Stoner

William Allison Logan

Campbell R McConnell

A method of regenerating a diesel particulate filter involves directing an exhaust stream from a combustion engine through the diesel particulate filter and selectively introducing a syngas stream at least periodically into the diesel particulate filter to regenerate it. The syngas stream is introduced at a first average flow rate during an initial regeneration stage and at a second average flow rate during a subsequent regeneration stage. In preferred embodiments the flow rate is varied in order to reduce temperature spikes and/or the rate at which CO slips through the filter during regeneration. In certain embodiments the first average flow rate is lower than the second average flow rate.

Method for regenerating a diesel particulate filter

In situations where the demand for syngas is intermittent, a fuel processor is operated to provide a high absolute hydrogen and carbon monoxide production, rather than to give a high fuel-specific hydrogen and carbon monoxide production. When a syngas generator is operated to intermittently produce syngas, a heating process can be performed between periods of syngas demand in order to keep the fuel processor within a desired temperature range. The heating process can comprise various steps or events including performing a heating event, allowing a standby period, and/or performing a carbon conversion event. Carbon formed during the process of converting fuel to syngas can be advantageously converted to maintain the temperature of the fuel processor within a desired range in between periods of syngas demand. A predictive method can be employed to control at least a portion of the heating process.

Method of operating a fuel processor intermittently

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Vancouver, Canada

Paul Sebright Towgood