Importance

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Abstract

A method and system are described for on-board treatment of an exhaust stream containing CO₂ emitted by a hydrocarbon-fueled internal combustion engine (ICE) used to power a vehicle in order to reduce the amount of CO₂ discharged into the atmosphere which include:

a. a first waste heat recovery zone on board the vehicle for receiving the high temperature exhaust gas stream in heat exchange relation and discharging the exhaust stream at a lower temperature, the waste heat recovery zone further including at least one heat exchanger and/or heat recovery device with an inlet for receiving the hot exhaust gas stream from the ICE for passage in heat exchange relation and an outlet for the cooled exhaust gas stream,the heat exchanger further including an inlet for receiving a heat exchange fluid at a first temperature and an outlet for discharging the fluid at a second higher temperature,the heat recovery device including power transmission means; b. a densification zone in fluid communication with the exhaust gas stream discharge outlet from the first waste heat recovery zone, the densification zone including means for reducing the temperature and volume of the CO2 to at least liquefy the CO2, and to produce a treated exhaust gas stream of reduced CO2 content;c. a separation zone in communication with the densification zone and having a discharge outlet for the treated exhaust stream;d. storage zone for receiving the densified CO2 for temporary storage on board the vehicle; ande. an exhaust gas conduit in fluid communication with the treated exhaust gas stream outlet from the separation zone.

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First Claim