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Direct densification method and system utilizing waste heat for on-board recovery and storage of CO;from motor vehicle internal combustion engine exhaust gases

  • US 9,297,285 B2
  • Filed: 01/20/2012
  • Issued: 03/29/2016
  • Est. Priority Date: 01/20/2011
  • Status: Active Grant
First Claim
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1. A method for reducing the amount of CO2 discharged into the atmosphere with the exhaust gas stream emitted by a hydrocarbon-fueled internal combustion engine (ICE) used to power a vehicle, the method comprising:

  • a. introducing the hot exhaust gas stream into a first waste heat recovery zone on board the vehicle and passing the high temperature exhaust gas stream in heat exchange relation with a least one heat recovery device that converts waste heat into electricity and/or mechanical work and/or heat exchanger and discharging the exhaust stream from the waste heat recovery zone at a lower temperature,b. introducing the cooled exhaust gas stream from the first waste heat recovery zone into a densification zone and densifying the CO2 by reducing the temperature and volume of the CO2 utilizing the electricity and/or mechanical work produced by the recovery device, and producing a treated exhaust gas stream of reduced CO2 content;

    c. separating the densified CO2 and the remaining treated exhaust stream in a separation zone;

    d. discharging the treated exhaust stream from the separation zone; and

    e. maintaining the densified CO2 in a storage zone for temporary storage on board the vehicle.

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