Supported　polyamines　are　promising　candidates　for　the　chemical　adsorption　of　CO2,　the　performance　of　which　is　highly　dependent　on　the　porous　structure　of　supports.　In　this　work,　we　synthesized　a　kind　of　fibrous　carbon　microspheres　(FCMs)　from　environmentally　friendly　and　low-cost　chitin.　The　synthesized　FCMs　have　microspheric　morphology　and　fibrous　sub-architecture,　and　the　carbon　fibers　interweave　to　form　pores　with　large　diameters.　The　flexibility　of　the　pores　formed　by　the　interweaving　of　carbon　fibers　also　enable　the　supporting　of　high　quantity　of　polyamines.　Given　these　features,　pentaethylenehexamine　(PEHA)　was　physically　dispersed　in　the　pores　of　FCMs　to　prepare　PEHA/FCMs　adsorbents,　which　were　systematically　characterized　and　investigated　for　CO2　capture　performance.　It　is　found　that　PEHA/FCMs　adsorbents　show　excellent　ability　for　CO2　adsorption,　with　the　highest　CO2　capacity　of　3.90　mmol　g−1　at　75　°C　when　using　10　vol%　of　CO2　for　determinations.　The　reversibility　of　PEHA/FCMs　adsorbents　for　CO2　adsorption　is　also　fairly　good,　and　PEHA/FCMs　adsorbents　have　strong　ability　for　the　selective　adsorption　of　low-content　CO2　from　N2.　©　2022　Institute　of　Process　Engineering,　Chinese　Academy　of　Sciences.