Reversible solid adsorption method and system utilizing waste heat for on-board recovery and storage of CO₂from motor vehicle internal combustion engine exhaust gases

摘要

A method and system for on-board treatment of an exhaust stream containing CO2 emitted by an internal combustion engine in order to reduce the amount of CO2 discharged into the atmosphere which include:
a. a treatment zone, preferably operating in swing mode with at least two subsystems, on board the vehicle containing a capture agent having a predetermined capacity for extracting CO2 from the exhaust stream, each subsystem having a heat exchanger with an inlet for admitting the hot exhaust gas stream for passage in heat relation with the capture agent to release CO2 and regenerate the capture agent, an outlet for passage of a treated, cooled exhaust stream having a reduced CO2 content, and an outlet for CO2 released from the regenerated capture agent;b. a compression zone for reducing the volume of the CO2; andc. a storage zone for the temporary storage of compressed CO2.

主权项

1. An integrated method for reducing the amount of CO2 discharged into the atmosphere with an exhaust gas stream emitted by an internal combustion engine (ICE) used to power a vehicle, the method comprising:
a. passing the exhaust gas stream into contact with a CO2 capture agent on board the vehicle, the capture agent having a predetermined capacity to extract CO2 from the exhaust stream; b. discharging a treated exhaust gas stream having a reduced CO2 content into the atmosphere; c. discontinuing the passage of the exhaust gas stream in contact with the capture agent when the concentration of the CO2 extracted by the capture agent has reached a predetermined level; d. heating the CO2 capture to release the extracted CO2 and regenerate the capture agent by heat exchange with a hot engine coolant stream at a temperature in the range of about 90° C. to 120° C. and the hot exhaust gas stream at a temperature in the range of about 300° C. to 650° C.; e. recovering an essentially pure CO2 gas stream; f. recovering heat and energy from the hot exhaust gas stream emitted by the ICE by contact with an energy conversion medium; g. compressing the recovered CO2 gas on board the vehicle to reduce its volume using the energy recovered in step (f); and h. temporarily storing the compressed CO2 on board the vehicle.