生物质流化床制备颗粒活性炭技术研究

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1、青岛科技大学硕士学位论文生物质流化床制备颗粒活性炭技术研究姓名：崔春霞申请学位级别：硕士专业：化学工艺指导教师：郭庆杰20090420青岛科技大学研究生学位论文RESEARCH0NPREPARATION0FACTIVATEDCARBONFROMBIOMASSINTHEFLUIDIZATIONBEDABSTRACTActivatedcarbonisallimportantadsorbent．Itisextensivelyusedinindustrysuchasenvkonmentalprotection，chemicalin

2、dustry,foodprocessing，pharm；iceuticalprocessing，andmilitarychemistry,etc．Chinahastheplentifulcropstalksresources，butmostofthemarediscardedaswastematerialorburnedout．Theabundantcropstalksasagriculturalbyproductcontainsplentifulfixedcarbon．Itissignificanttoexplorene

3、wapplicationofcropstalks．．Firstly,tobetteroperateanddesignafluidizationbedtoconvertbiomasssuchaswheatstalk。cornstalkandwoodpowderintoactivatedcarbon，theminimumfluidizationvelocityofbiomassmixingwithsandisobtainedbyexperiment．Thebiomasschoosedincludeswheatstalk，cor

4、nstalkorwoodpowder．Forsuchbi-componentmixtures，theweightpercentofbiomassarefixedat10％，20％，30％，40％．50％and60％．Theexperimentshowsthattheminimumfluidizationvelocityofthemixtureincreaseswithincreasingweightpercentofbiomass．乃Pweightpercentofbiomassisequalorlesserthan10％

5、，themixturesarecharacterizedbygoodfluidizationbehaviors．Usingnitrogenandcarbondioxideasfluidizedmedium，thepressuredropsofemptybedandthebedloadingspecifiedvolumeofmaterialunderdifferentvelocitiesinaseriesoftemperatures(roomtemperature，300℃，600℃，700℃，800℃，900℃)weree

6、xamined．Theexperimentshowsthattheminimumfluidizationvelocityofthemixturedecreaseswiththetemperatureincrease．Inthisstudy,activatedcarbonwaspreparedfrombiomasssuchaswheatstalk，comstalkandwoodpowderusingcarbondioxideastheactivatinggasinafluidizedbedIII生物质流化床制备颗粒活性炭技术

7、研究reactor．Theeffectsofprocessparameterssuchasfluidizednumber,activatingtemperatureandactivatingtimeontheadsorptionpropertieswereinvestigated．Theproductswerecharacterizedbyiodinevalue，methyleneblueadsorptionvalueandSEM．Itwasconcludedthatactivatingconditionsareasfol

8、lows：thefluidizednumberofallthreekindbiomass1．5，theactivatingtemperatureofthethree800℃，andtheactivatingtimeofwheatstalkandcornstalk30rainwhilewoodpowder