简介:Twoseriesofmixedoxides,CoAlMandMgAlM(M=Cr,Mn,Fe,Co,Ni,Cu),werepreparedbycalciningtheircorrespondinghydrotalcite-likecompounds(HTLc).TheratioofMg:Al:M(orCo:Al:M)was3:1:1.ThecatalyticactivityofallsamplesforthereactionofNO+COwasinvestigated.TheresultsshowedthattheactivityofCoAlMwasmuchhigherthanthatofMgAlM.ThestructureandthepropertyofredoxwerecharacterizedbyXRDandH2-TPR.TheresultsindicatedthatonlyMgOphasewasobservedaftercalciningMgAlMhydrotalcites,andthetransitionmetalsbecamemorestable.Thespinel-likephaseappearedinallofCoAlMsamplesafterthecalcination,andthetransitionmetalswerechangedtobemoreactive,andeasilyreduced.TheactivitiesofthreeseriesofmixedoxidesCoAlCuobtainedfromdifferentpreparationmethods,differentratioofCo:Al:Cuandatdifferentcalcinationtemperatures,werestudiedindetailforproposingthemechanismofreaction.TheabilityofadsorptionofNOandCO
简介:摘要 :国有炼油化工生产企业担负着为社会提供石油化工产品的责任,同时也担负着创造经济效益的任务。作为能量消耗大户,生产装置采取适合的节能措施,降低生产过程的能量消耗可以实现降本增效 [1] 。
简介:摘要:柴油是将石油常压分馏处理得到的,简单地炼制所提取到的柴油含有较多的杂质,其中包含硫、氮、氧、烯烃等,烯烃含量过高则会引起柴油变色,在燃烧之后会造成大气污染。为提升柴油品质,在柴油的加工过程中引入加氢工艺,有效减少杂质含量,提升柴油产品的稳定性。基于此,本文阐述了柴油加氢技术的原理,然后对柴油加氢技术的工艺策略展开探究。