Influenceofdifferentsurfacemodificationtreatmentsonbiomassbasedcarbonsandtheireffectsonadsorptionof5101520carbondioxideTAOZhiwei,SONGMin,WUJian,CHENYuxia,CHENSheng,YANGKeyun**(SchoolofEnergyandEnvironment,SoutheastUniversity,Nanjing210096)Abstract:Surfacemodificationofbiomassbasedcarbonwithnitrogencontainingfunctionalgroupsisperformedusingthedifferentmodificationmethod,includingthethermalandchemicalmethods.WealsoinvestigatetheeffectofthedifferentreactionparametersontheirporestructureusingtheBrunauer-Emmett-Teller(BET)surfaceareaandadsorptionperformancebasedonmethyleneblue(MB)value.Fouriertransformsinfraredspectroscopy(FT-IR)methodsareperformedtoconfirmthepresenceofN-containinggroups.Basedonaboveresults,thecomparisoneffectofdifferentmodificationmethodsonphysico-chemicalproprietyandadsorptionpropertiesofbiomassbasedcarbonmaterialsarecarriedout.Inconclusion,allmodificationmethodscouldenhanceCO2adsorptioncapability.However,thecarbonmaterialstreatedwithammoniausingthermalmethodshowthebestperformance.Keywords:Activatedcarbon;Functionalgroups;Porosity;Surfacemodification;CO2adsorption0IntroductionTherehasbeenanemphasisoncarbondioxideremoval,whichisenvironmentallysignificantforminimizationofitseffectonglobalwarming[1-2]onalargescale,severaldifferentapproacheshavebeenproposed[3-4]technologiesforsuchseparationpurposes,adsorptionprocessesonsolidmediaarewell-known253035[5-6]adsorptioninteractions.Aseriesofsolidmaterialshavebeenusedforselectiveadsorptionresearches[7-11].Amongthem,activatedcarbon(AC)exhibituniqueadvantagesduetoitslargespecificsurfacearea,porousstructureandgoodadsorptionproperties.Arangeofcarbonaceousandmineralprecursors,suchascoals(e.g.,bituminouscoal,lignite),industrialbyproducts(e.g.,scrapsofpolymericmaterials,petroleum,cokepitch),andwoodorotherbiomasssources(e.g.,sawdust,coconutshells,olivestones),areusedtoprepareactivatedcarbon[12-16].Currentconcernsofincreasingenergyshortageandenvironmentalrequirementshaveinitiatedextensiveeffortstowardthemoreefficientutilizationofbiomassasarawmaterialforproductionofactivatedcarbons.Theporosityandsurfacechemistrydependsontheprecursorsaswellasthepreparationmethods.Therearebasicallytwomethodsformanufacturingactivatedcarbons,i.e.physicalandchemicalactivation[17-19].Physicalactivationcanbecarriedoutbythepartialgasificationofcarbonaceousmaterialinthepresenceofoxidizinggasessuchassteam,CO2,air,oracombinationofthese.Chemicalactivationinvolvesimpregnationoftherawmaterialwithdehydrating40chemicalagentssuchasKOH,H3PO4,orZnCl2inaninertatmosphere.Thechemicalactivationprocessesleadtoincreaseofcarbonizationability,andthereforedevelopmentofadesiredpore---本文来源于网络，仅供参考，勿照抄，如有侵权请联系删除---.AsameanstoremoveCO2fromfluegases.Amongthediverse.TheseadsorbentscanoperateviaweakphysicaladsorptionprocessesorstrongchemicalBriefauthorintroduction:TAOZhiwei（1991-），Male,bachelor,solidwastedisposalCorrespondanceauthor:SONGMin(1982-),Female,Associateprofessor,Solidwastedisposal.E-mail:sm@seu.edu.cn-1----本文来源于网络，仅供参考，勿照抄，如有侵权请联系删除---structure.Thecarbonaceousmaterialsaremodifiedtoproducesuitableporosityandactivesites,whileincreasingthesurfaceareaduringphysicalorachemicalactivationprocess[20].Recently,carbonadsorbentswithspecificnitrogen-containingfunctionalgroupshavebeen45devel...