Process for onboard carbon capture using CO2 stripping and heat recovery

A system for capturing and recovering carbon dioxide (CO2) from two or more distinct waste heat sources, the system comprising:

• an absorber configured to extract at least a portion of CO2 from an exhaust gas into a lean solvent stream comprising a solvent selective for absorbing CO2 and to produce a rich solvent stream comprising solvent and absorbed CO2;
• a solvent regenerator configured to convert a first fraction of the rich solvent stream into the lean solvent stream and a crude CO2 vapor, wherein the solvent regenerator is coupled to the absorber such that the solvent regenerator is downstream of the absorber for receiving the first fraction of the rich solvent stream and upstream of the absorber for providing the lean solvent stream;
• a cross exchanger configured to exchange heat between the lean solvent stream being fed from the solvent regenerator to the absorber and the rich solvent stream being fed from the absorber to the solvent regenerator;
• two or more heat exchangers associated with the solvent regenerator and configured to transfer heat from the two or more distinct waste heat sources into a second fraction of the rich solvent stream and to recover waste heat from the two or more distinct waste heat sources;
• a compressor configured to convert the crude CO2 vapor into a concentrated pressurized CO2 product, wherein the compressor is downstream of the solvent regenerator;
• and
• a CO2 storage tank configured to both receive and store the concentrated pressurized CO2 product, wherein the CO2 storage tank is downstream of the compressor.