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时间:2020-03-26
《原料对自由落下床中生物质与煤共热解行为的影响.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39卷第lO期燃料化学学报V01.39NO.102011年10月JournalofFuelChemistryandTechnologyoct.2011文章编号:0253-2409(2011)10-0728-07Effectsoffeedstockonco-pyrolysisofbiomassandcoalinafreefallreactorWEILi—gang,ZHANGLi,XUShao—ping(1.StateKeyLaboratoryofFineChemicals,DepartmentofChemicalEngineering,DalianUn&e~ityofTechn
2、ology,Dalian116012,China;2.SchoolofLightIndustryandChemicalEngineering,DalianPolytechnicUniversity,Dalian116034,China)Abstract:Effectsoffeedstockontheco—pyrolysisofbiomassandcoalwereinvestigatedinafreefallreactorat500℃~700℃withbiomassblendingratioof0—100%(massratio).Theselectedcoalsmnpleswer
3、eDayanbrowncoal(DY)andTiefabituminouscoal(TF),andthebiomasssampleswereagriculturalresidueslegumestraw(LS)andwoodyresiduespinesawdust(SD).TheresultsindicatethatthesynergyCaloccureveninashortgasresidencetimeduringtheco—pyrolysisofbiomassandcoalinaflee—fallreactor.TheproductyieldsandtheCO2react
4、ivityofcharfromtheco—pyrolysisaregreatlyinfluencedbythetypeoffeedstock.ThesynergyinthepresenceofLSwimhighholocelluloseandashcontentismoresignificantthanthatinthepresenceofSD.TheliquidyieldofhighrankTFco—pyrolysisishigherthanthatoflowrankDYcoa1.Thecharreactivitycanbeimprovedbytheco—pyrolysisa
5、tspecificconditions.Theco—pyrolysisinpresenceofDYcanimprovethereactivityoftheproducedchar.Keywords:biomass;coal;co-pyrolysisCLCnumber:TQ536.1Documentcode:ACoalpyrolysisisapromisingprocessforusefulsynergyISmainlycausedbyprimarypyrolysisprocessliquidfuelsandchemicals.However,thequantityorthese
6、condreactionofvolatilesconsideringthelongandqualityoftheseproductsarelimitedbecauseofreactiontime.Thefree.fallreactothastheadvantagesthelowH/Catomratioincoa1.CarelessutilizationofOfthehighheatingrateandtheshortresidencetimecoalwillalsoworsenenvironmentalproblemssuchas(intheorderofseconds)ofb
7、othsolidandgas.ItisCO2一emissionsandairpollution[1.2]agoodapproachtoinvestigatethemechanismsand.Recently,interestinco—pyrolysisofbiomass/coalhasbeenbehaviorsoffastpyrolysisofsolidfuelinafreeflallgrowingsignificantly[~Theadditionofthereactor.Inourpre
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