%0 Journal Article
%T DehydrocyclizationofDiphenylaminetoCarbazoleoverPlatinum-BasedBimetallicCatalysts
%J ´ß»¯Ñ§±¨
%P 1439-1444
%D 2010
%X £¿Gasphasedehydrocyclizationofdiphenylamine(DPA)tocarbazoleovermonometallicandbimetallic0.4wt%Pt-basedcatalystsinafixedbedreactorwasstudiedinthepresenceofhydrogenatatemperatureof550oC.AluminaandcarbonsupportedPtcatalystsshowedveryhighinitialactivity(>95%).TheselectivityforcarbazoleovercarbonsupportedPtcatalystswasslightlylower.Dopingofthecatalystwithpotassiumledtoanincreaseintheselectivityforcarbazoleby15%.BimetallicPt-Sncatalystspreparedbyco-impregnationwerelessselectivethancatalystspreparedbysuccessiveimpregnation.TheselectivityforcarbazoleoverbimetallicPt-Sncatalystspreparedbysuccessiveimpregnationwas75%,buttheiractivitydecreasedwithincreasedSnloading.HighlyactiveandreasonablyselectivecatalystswereIr-dopedbimetallicPt-basedcatalysts.TheconversionofdiphenylamineoverPt-Ircatalystswasabove98%andtheselectivityforcarbazolewasnearly55%,whilethelifetimewasmuchlonger.
%K diphenylamine
%K carbazole
%K dehydrocyclization
%K platinum
%K tin
%K iridium
%K bimetalliccatalyst
%U http://www.chxb.cn/CN/abstract/abstract20247.shtml