Pinch　analysis　for　a　CO2　capture　system　of　34.72　kg/s　production　is　carried　out　to　reduce　the　energy　penalty　in　this　paper.　Based　on　the　pinch　analysis　results,　the　optimal　heat　exchanger　networks　are　proposed.　In　order　to　recover　the　waste　heat　further　and　provide　the　process　integration　schemes　comprehensively,　the　process　integration　of　different　heat　pumps　and　refrigerators　is　analyzed　based　on　the　pinch　analysis.　Furthermore,　the　improved　process　integration　methods　are　proposed　considering　the　operation　characteristics　of　the　carbon　capture　system.　Results　show　that　the　process　integration　of　the　vapour-compression　heat　pump,　the　absorption　heat　pump,　the　absorption　heat　transformer　and　the　vapour-compression　refrigerator　into　the　CO2　capture　system　is　valid　only　when　they　are　set　across　the　pinch　temperature.　For　an　absorption　refrigerator,　placement　across　the　pinch　is　effective　and　is　the　best　choice,　although　it　is　difficult　or　even　impossible　to　be　implemented　in　the　carbon　capture　system.　If　the　below-ambient　cooling　is　required　in　the　carbon　capture　system,　placement　of　an　absorption　refrigerator　below　the　pinch　temperature　is　also　feasible　to　be　implemented,　less　effective　than　the　best　choice.　In　the　CO2　capture　system,　an　absorption　refrigerator　can　be　driven　by　the　CO2　+　H2O　stream　from　the　top　of　the　stripper　to　liquify　the　CO2　gas.　And　the　released　heat　of　the　CO2　+　H2O　stream　is　＂free＂,　thus　a　direct　saving　is　achieved　in　the　cold　utility　which　must　be　supplied　to　cool　the　CO2　product.　(C)　2015　Elsevier　Ltd.　All　rights　reserved.