Wet Air Oxidation of Organic Wastewater Catalyzed by Doped Ceria

(整期优先)网络出版时间:2007-02-18
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Thecatalyticwetairoxidation(CWAO)ofHacidandphenolwasinvestigatedinthepresenceofCuorFedopedCeO2solidsolutions,whichwereobtainedbysol-gelmethod.TheexperimentresultsshowedthattheincorporationofCuorFeintothefluoritelatticeofCeO2stronglyenhancedtheoxidationactivityofthecatalyst.At90℃and0.1MPa,Hacidconversionwas70%fortheCe0.9Fe0.1O2-δand60%fortheCe0.9Cu0.1O2-δcatalyst.Forphenolremoval,theconversionwas70%fortheCe0.9Cu0.1O2-δcatalyst,whilefortheCe0.9Fe0.1O2-δtheconversionwas30%.TheresultsindicatedthatCe0.9Cu0.1O2-δwassuitableforthetreatmentoforganicwastewaterswhileCe0.9Fe0.1O2-δwassuitablefortheremovalofHacid.The70%phenolremovalratewithCe0.9Cu0.1O2-δcatalystwasmarkedlyincreasedto90%withCe0.8Cu0.2O2-δcatalyst.However,thephenolremovalreducedfrom30%to15%withFecontentincreasingfrom10%to20%.FortheHacid,theincreaseofthecontentofCuorFetendedtoobviouslyincreasetheoriginalreactionratewhiletheCODremovalchangedlittle.