2m/gDOI10.11715/rskxjs.R201308009PreparationandCharacterizationofActivatedCarbonsBasedAlkaliLigninbyKOHChemicalActivationXiaoGang，WuRongbing，ZhouHuilong，NiMing激ang，GaoXiang，CenKefa(StateKeyLaboratoryofCleanEnergyUtilization，Zhe激angUniversity，Hangzhou310027，China)Abstract：Activatedcarbon(AC)withhighspecificsurfaceareawaspreparedfromalkaliligninbychemicalactivationwithKOHanditscharacteristicswereinvestigated.Theactivationprocesseswereconductedatvarioustemperatures(T，600—900℃)，KOH/ligninmassratios(R，1∶1—4∶1)，activation(t，1—3h).Bothscanningelectronmicros-copy(SEM)andnitrogenadsorptionisothermasBrunauer-Emmett-Teller(BET)wereusedtoidentifythestructuralcharac-teristicsofthetestedAC，andFouriertransforminfraredspectroscopy(FT-IR)methodwasappliedtoanalyzesurfacefunc-tionalgroups.Underexperimentalconditions，theoptimumconditionforpreparinghighspecificsurfaceACof2684m/gwasR＝3∶1，T＝750℃，t＝1h.TheresultsshowedthatRwasthecriticalfactorinfluencingtheBETspecificsurfaceareacomparedwithTandt.PoredistributionofthepreparedACmainlyconcentratedonmicroporesandmesopores.Chemicalgroupssuchas—OHand—C＝OwerecharacterizedbyFT-IR.Keywords：lignin；activatedcarbon；chemicalactivation；KOHKOH活化木质素制备高比表面积活性炭特性研究肖刚，吴荣兵，周慧龙，倪明江，高翔，岑可法(浙江大学能源清洁利用国家重点实验室，杭州310027)摘要：以木质素为制备原料，采用KOH为活化剂制备高比表面积活性炭．通过探究不同活化温度、活化剂与木质素质量比、活化时间对活性炭孔隙结构的影响，优化木质素活性炭的制备工艺．采用BET、SEM、FTIR等手段对活性炭性能进行表征．实验结果表明，最佳制备工况为KOH/木质素质量比为3∶1，活化时间1h，活化温度为750℃．其中，KOH/木质素质量比对焦炭孔隙结构影响最大，活化温度次之，活化时间影响最小．制备的活性炭比表面积最高可达26842，孔径分布以中微孔居多，表面含有—OH、—C＝O等基团．关键词：木质素；活性炭；化学活化；KOH：TK6文献标志码：A：1006-8740(2014)01-0014-07Activatedcarbon(AC)iswidelyusedduetoitsad-sorptivecapacitywithahighspecificsurfaceareaandfunctionalgroups，suchasadsorbentforremovalofpollutions[1-2]，catalystsupportincatalysis[3-4]andgasstorage[5].TheworlddemandforACwasabout4.28millionmetrictonnesin2012anditisexpectedtoin-creasebymorethan10%peryearoverthenextfiveyears[6].However，itswideapplicationsarelimitedby---本文于网络，仅供参考，勿照抄，如有侵权请联系删除---highproductioncost.Inrecentyears，manyresearchershavepreparedACfrommanycheaperandrenewablematerials.AgriculturalwastesarepromisingsourcesofACbecauseoftheirlowcostandabundance.Presently，quitealotofliteraturehasreportedtheuseofnutshells[7-8]，bamboo[9]，fruitshell[10]，lotusstalk[11]，etc.，asrawmaterialsowingtotheirhighcarbonandlowashcontents.Ligninisparticularlysuitableforpreparation收稿日期：2013-08-16.基金项目：国家自然科学基金资助项目(51276167；50806013)．作者简介：肖刚（1979—），男，博士，副教授．通讯作者：肖刚，xiaogangtianmen@zju.edu．网络出版时间：2013-11-05.网络出版地址：wwcnki/kcms/detail/12.1240.TK.20131105.1115.001．---本文于网络，仅供参考，勿照抄，如有侵权请联系删除---ofACbecauseofitshighphenoliccontent，whichhelpstogethighercarbonyield.Furthermore，ligninisthesecondmajorcomponentinbiomassaftercelluloseandproducedinlargequantitiesasaby-productfrompulp-ingindustry.InthepulpandpapermillsofChina，atleast5milliontonsofwasteligninslurryareproducedeveryyear[12].Thepropertieso...