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过程工程学报 2007
PreparationofHydrogenthroughCatalyticSteamReformingofBio-oilKeywords: fastpyrolysis,bio-oil,hydrogen,steamreforming,Ni-basedcatalys,carbonselectivity Abstract: Hydrogenwaspreparedviacatalyticsteamreformingofbio-oilwhichwasobtainedfromfastpyrolysisofbiomassinafluidizedbedreactor.Influentialfactorsincludingtemperature,weighthourlyspacevelocity(WHSV)ofbio-oil,massratioofsteamtobio-oil(S/B)aswellascatalysttypeonhydrogenselectivityandotherdesirablegasproductswereinvestigated.Basedonhydrogeninstoichiometricpotentialandcarbonbalanceingaseousphaseandfeed,hydrogenyieldandcarbonselectivitywereexamined.TheexperimentalresultsshowthathighertemperaturefavorsthehydrogenselectivitybyH2molefractioningaseousproductsstreamanditplaysanimportantroleinhydrogenyieldandcarbonselectivity.Higherhydrogenselectivityandyield,andcarbonselectivitywereobtainedatlowerbio-oilWHSV.Incatalyticsteamreformingsystemamaximumsteamconcentrationvalueexists,atwhichhydrogenselectivityandyield,andcarbonselectivitykeepconstant.Throughexperiments,preferentialoperationconditionswereobtainedasfollowstemperature800~850℃,bio-oilWHSVbelow3.0h-1,andmassratioofsteamtobio-oil10~12.TheperformancetestsindicatethatNi-basedcatalystsareoptional,especiallyNi/a-Al2O3effectiveinthesteamreformingprocess.
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