Abstract
For a natural gas-capture from flue gases using chemical absorption with aqueous monoethanolamine (MEA), is one of the most near-term technologies. A chemical absorption, postcombustion CO2 capture unit is simulated and an exergy analysis was conducted, including irreversibity calculations for all process units. With pinpointing major irreversibilities, new proposals for efficient energy integrated chemical absorption process were suggested. Moving further to the whole natural gas combined cycle plant with a CO2 capture unit, it has been analyzed on an exergetic basis. By defining exergy balances and black-box models for plant components, investigation has been made to determine effect of each component on overall exergy efficiency. Simulation of chemical absorption plant was done using UniSim Design software with Amine Property Package which maintains thermodynamic data.
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