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页数:7页
时间:2020-03-26
《微波再生对活性炭循环吸附SO2的影响.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第42卷第7期燃料化学学报Vo1.42No.72014年7月JournalofFuelChemistryandTechnologyJu1.2014文章编号:0253-2409(2014)07-0890-07微波再生对活性炭循环吸附SO2的影响张立强,崔琳,王志强,董勇(山东大学燃煤污染物减排国家工程实验室,山东济南250061)摘要:研究了脱硫活性炭的微波再生及其对烟气中SO的循环吸附特性。通过扫描电镜、N:吸附、元素分析、Boehm滴定等表征了微波再生对活性炭孔隙结构和表面化学性质的影响,分析了微波再生对活性炭循环吸附烟气中SO:的影响规律。结果表明,微波再生是
2、脱硫活性炭再生的有效手段,在合适的再生功率下,经过多次循环吸附/再生后,活性炭仍然保持较高的吸附容量,吸附17次后再生活性炭仍然高于原始活性炭,但同时由于再生过程中存在C与H:so4的反应,活性炭存在明显的烧失现象。初次再生后,活性炭的表面酸性官能团在高温下基本完全分解,碱性官能团含量上升,活性炭的SO:吸附容量明显提高;多次吸附/再生循环后,再生反应起到了活化的作用,使活性炭的孔结构变狭长,微孔比表面积和微孔容积呈上升趋势,同时酸性和碱性官能团基本保持稳定,活性炭的SO吸附容量逐渐增加。关键词:活性炭;微波再生;孔隙结构;表面官能团;SO中图分类号:TK09文献
3、标识码:AEffectsofmicrowaveregenerati0n0factivatedcarbononitsS0,adsorptionZHANGLi.qiang.CUILin,WANGZhi—qiang。DONGYong(NationalEngineeringLaboratoryfo,Coal-firedPollutantsEmissionReduction,ShandongUniversity,Jinan250061,China)Abstract:ThemicrowaveregenerationofSO,loadedactivatedcarbon(AC)a
4、nditscirculationadsorptioncharacteristicswerestudied.TheeffectsofmicrowaveregenerationontheporetextureandsurfacechemistryofACwereanalyzedbySEM。lowtemperatureN,adsorption,elementalanalysisandBoehmtitration.Theresultsshowthatmicrowaveirradiationisaneffectiveregenerationmethod.Inthesuita
5、bleregenerativepower,aftermanycirculationadsorption/regeneration,theACstillremainshighadsorptioncapacity.After17mcirculation,theadsorptioncapacityofACisstillhigherthantheprimitiveAC.Hower,thereisobviouslyweightlossforACduringtheregenerationbecauseofthereactionbetweenCandH,SOd.Afterfir
6、stregeneration,thesurfaceacidicfunctionalgroupsoftheACalmostdecomposeathightemperature,andthesurfacebasicfunctionalgroupsincrease,SOtheSO,adsorptioncapacityofACisenhanced.Afterseveraladsorption/regenerationcirculations.thesurfaceacidicfunctionalgroupsandbasicfunctionalgroupsremainstab
7、le,WhiletheporestructureofACbecomeslongandnarrowfortheactivationofregeneration.Andthespecificsurfaceareaandvolumeofmicroporeincrease,whichbenefitstheSO,adsorptiononAC.Keywords:activatedcarbon;microwaveregeneration;poretexture;surfacefunctionalgroups;SO2作为可资源化烟气脱硫技术,活性炭法烟气脱李兵等对微波辐照改性活性
8、炭进行了研
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