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Through this study,simulation works for a carbon dioxide capture process using solvent absorption method have been performed to decrease the regeneration heat by applying phase transition of liquid solvent.When carbon dioxide is dissolved in 30 wt% MEA solvent,liquid mixture was split into two phases,upper phase is a lean solvent and the other lower phase is a rich solvent according to mole loading of dissolved carbon dioxide.Using this phenomenon,we can decrease regeneration energy about 61% than a conventional absorber column-stripper column process.