Carbon Dioxide Capture and Utilization for Gas Engine

Abstract

Sodium glycinate absorption and ethylene carbonate synthesis from a mi xture gas of ethylene oxide and carbon dioxide are evaluated as carbon dioxide capture and utilization system for gas engine flue gas. The energy requirement for CO 2 capture is estimated at 3.3 GJ/tonne CO 2 . The ethylene carbonate synthesis utilizes more than 90% of the captured CO 2 and supply 2.5 GJ/tonne CO 2 of thermal energy, which is 76% of the energy requirement for CO 2 capture. The thermal integration of the sodium glycinate absorption and the ethylene carbonate synthesis reduces the energy requirement for CO 2 capture from 3.3 GJ/tonne CO 2 to 0.8 GJ/tonne CO 2 . The energy requirement for the CO 2 capture is supplied using the steam saturated at 0.78 MPa from the gas engine without its electric power reduction.