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OALib Journal期刊
ISSN: 2333-9721
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DehydrationofxylosetofurfuralusingaLewisorBr？nstedacidcatalystandN2stripping
DOI: 10.1016/S1872-2067(12)60599-3, PP. 1402-1406
Keywords: Lewisacid,Br？nstedacid,Reactionmechanism,Xylosedehydration,Furfural,Nitrogenstripping
Abstract:
？TheactivityofLewis(Nb2O5)andBr？nsted(Amberlyst70)acidcatalystsforthecyclodehydrationofxylosetofurfuralwasstudied.Thenatureoftheacidityresultedinsignificantchangesinthereactionmechanism.Lewisacidsitespromotetheformationofxylulose,whileBr？nstedacidsitesarerequiredtofurtherdehydratethesugartofurfural.Amberlyst70inwater/tolueneat175℃showedloweractivitybutgaveahigherfurfuralyield.UsingN2asthestrippingagentconsiderablyimprovedthefurfuralyieldandproductpurityinthestrippedstream.Catalyststabilitywasalsostudied.
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