生物质催化热解脱氧机理研究

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1、AbstractAbstractTheexploitationandutilizationofbiomassenergywillrelievethepressurescausedbyfossilfuelshortageandenvironmentalpollution,whichisbeneficialforsustainabledevelopmentinChina．Thebio—oilfromthefastpyrolysisofbiomassisallidealalternativenewtypefueltofossilfuels．Ho

2、wever,thehighoxygencontentofbio-oilleadstosomeshortcomingsofbio．oilcomparedtofossilfuels，suchasthermalinstability,lowcalorificvalueandcorrosiveness．Therefore，howtoreducetheoxygencontentofbio-oiltopromoteitsqualitybecomesthefocusofthecurrentresearch．Catalyticpyrolysisisapr

3、omisingtechnologyforthedeoxygenationofthebio-oil．Inwhichtheoxygen-containingcomponentstransformedintohydrocarboncomponenB，andtheoxygencontentwasremovedintheformofC02，COorHE0．ChoosingcomcobasbiomassmaterialandtakingHZSM-5，MCM一41，CaO，MgO，T．A1203ascatalysts，thereactionmechan

4、ismofdeoxygenationofcatalyticpyrolysisofbiomasswasinvestigatedthroughtheexperimentalandtheoreticalmethod．andcharacteristicsofbiomassunderdiffrentcatalyticconditionswerePyrolysisprocesswiththeFouriertransformationinvestigatedusingthethermogravimetryanalyzercoupledinfrareds

5、pectroscope(TG-FTIR)technology,thedeoxygenationdisciplineofcatalyticpyrolysisofbiomassunderdifferentcatalyticconditionswasalsodiscussed．Theresultsshowedthatalltheselectedcatalystsincreasedtheconversionrateofbiomass，twothermogravimetricpeaksappearontheDTGcurvesusingcalcium

6、oxideascatalyst．HZSM-5promotedtheformationofphenols，andthedeoxygenationofethers，acids，andaldehydesintheformofCOwerealsopromoted；WhentakingCaO，MgOasthecatalysts，themostnotablechangeWasthesignificantdecreaseoftherelativecontentoftheacidsinthepyrolysisproducts，CaOandMgOpromo

7、tedthedeoxygenationintheformofCOandC02respectively．ThedeoxygenationofethersintheformofCOmaybepromotedwithY-A1203ascatalyst．Intheexperimentsofonlinedeoxygenationofpyrolysisvaporsfromthefastpyrolysisofbiomass，theeffectofdifferentcatalystsandcatalytictemperatureontheyieldoft

8、hepyrolysisofpyrolysiswerestudied．Thereactionpathwaysofproductsandthecompositionsproductsthedeox