%0 Journal Article
%T 纳米贵金属插入的粘土用于催化选择性加氢反应
%J 催化学报
%P 1200-1208
%D 2010
%R 10.1016/S1872-2067(10)60112-X
%X ？Theuseofclaymineralsinthesynthesisofnanosizednoblemetalparticlestogiveincreasedcatalyticactivitywasinvestigated.Nanosizedplatinumandrutheniumcatalystsintercalatedinclay(montmorillonite/hectorite)weresynthesisedandtheircatalyticactivitywasevaluatedfortheselectivehydrogenationofthreedifferentα,β-unsaturatedaldehydes,namely,crotonaldehyde,cinnamaldehyde,andcitral,inagasphasemicroreactor.Themetalnano-solwaspreparedbythechemicalreductionofitsprecursorbythemicellartechniqueinthepresenceofcetyltrimethylammoniumbromide(CTAB),andthemicellestabilizedmetalparticleswereintercalatedintheclaymineralbyionexchange.TEMmicrographsofthecatalystparticlesshowedthatthemetalparticleswereinthenanometrerange.Theaveragediametersoftheparticleswere1–25nm.Theeffectsoftemperature,metalloading,andhydrogenflowrateonthecatalyticactivityandselectivityforα,β-unsaturatedalcoholwerestudied.Theresultswerecorrelatedwiththestructuralpropertiesofthecatalysts.Theproductsformedineachreactionoverthedifferentcatalystsshowedthatthecatalystswereveryactiveforhydrogenation,andtheselectivityforthedesiredproduct,namely,α,β-unsaturatedalcohol,wasgood.Themetalcatalystsintercalatedinmontmorilloniteshowedbetterselectivitythanthatinhectoritebecauseofitshigheracidity.Increasedselectivityforα,β-unsaturatedalcoholwasobservedwithincreasedflowrateofhydrogen.
%K selectivehydrogenation
%K nano-particle
%K platinum
%K ruthenium
%K intercalatedmontmorilloniteorhectorite
%K vaporphasereaction
%U http://www.chxb.cn/CN/abstract/abstract20224.shtml