The　nitrogen-rich　carbon　microspheres　were　prepared　by　the　one-pot　hydrothermal　synthesis　in　the　presence　of　resorcinol　formaldehyde　as　the　carbon　precursor　and　tetraethylenepentamine　(TEPA)　as　nitrogen　precursor　as　well　as　the　base　catalyst,　followed　by　carbonization　and　activation.　Their　nitrogen　content　and　microstructure　of　the　nitrogen-rich　carbon　microspheres　could　be　adjusted　by　varying　the　addition　of　TEPA.　The　significant　enhancement　of　the　microstructure　and　the　nitrogen　doping　leads　to　high　CO2　adsorption　in　the　activated　carbon　microspheres.　The　high　nitrogen　content　of　activated　sample　AMPS-4　was　5.61%,　and　the　large　specific　surface　area　and　micropore　volume　were　786.5　m(2)/g　and　0.28　cm(3)/g,　respectively.　The　activated　sample　AMCS-4　had　the　highest　CO2　adsorption　reaching　5.52　mmol/g　and　2.97　mmol/g　at　0　and　25　degrees　C,　respectively.　Compared　with　EDA-prepared　carbon　microspheres　AMCS-4E,　TEPA-prepared　carbon　microspheres　AMCS-4　have　stabler　chemical　adsorption　to　CO2　due　to　their　higher　nitrogen　content,　which　is　in　corresponds　to　the　higher　adsorption　heat.　The　introduction　of　polyvinylpyrrolidone　(PVP)　into　the　system　as　a　stabilizer　not　only　improved　the　monodispersity　of　carbon　microspheres　but　also　improved　the　adsorption　performance　of　CO2　by　increasing　the　micropore　volume　and　decreasing　the　micropore　size　of　the　microspheres.　The　CO2　adsorption　of　the　PVP-assisted　prepared　sample　AMCS-2-P1　reached　4.48　mmol/g　and　2.95　mmol/g　at　0　degrees　C　and　25　degrees　C　respectively,　which　is　0.72　mmol/g　and　0.25　mmol/g　higher　than　that　of　AMCS-2.　The　carbon　microspheres　have　high　CO2　dynamic　adsorption　capacity,　excellent　selective　adsorption,　and　good　cyclic　stability.　[GRAPHICS]　.