原料对自由落下床中生物质与煤共热解行为的影响.pdf

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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