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《(類)鈣鈦礦型復(fù)合氧化物催化消除n2o的的研究》由會員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫。
1、黑龍江大學(xué)碩士學(xué)位論文AbstractNitrousoxide(N20)isnowrecognizedasallenvironmentalpollutant．ItisnotonlyasubstantialcontributortocatalyticozonedepletionbybeingamajorsourceofNOxinthestratosphere，butisalsoagreenhousegas．N20has310and21timestheglobalwarmingpotential(GWP)ofcozandCH4，respectively．T
2、ocontroltheemissionofN20fromchemicalprocesses，thecatalystsforN20decompositionhavebeenwidelystudiedinthelastthreedecades．TheS01．GelmethodandcitratecombustionmethodwereadoptedtosynthesizePerovskiteorperovskite—likeoxidessamplesinthisdissertation，respectively．Thestructureproperties
3、ofsampleswerecharacterizedbyXRD，andH2一TP心02-TPDwereinflavorofunderstandingthecrystalstructure，surfacecharacteristicsandsurfaceactivespecies．Thecatalyticactivityofseveralperovskiteandperovskite—likecatalystsweretested，andtheeffectofthealkalineearthmetalions、alkalineearthcarbonate
4、、alkalineearthoxidesdopedperovskite—likecatalystsforcatalyticdecompositionofN20wereinspected．ItWasfoundthattheactivityinN20directdecompositioncouldbeimprovedbysubstitutingallalkaline—earthmetalsforLa，inwhichthesamplesofsubstitutingBaforLaperformedbestactivity．Dopingalkalineearth
5、oxidesalsohadagreatinfluencetothecatalyticactivityofperovskite·like．CaOCanpromotedthecatalyticperformanceofperovskite．1ikeinN20directdecomposition．ButBaOhadseriousactivityinhibition．LaL681"0．4Cu04-20％MgOsamplesshowedexcellentcatalyticactivitiesforthedecompositionofN20，whichCanco
6、nvert100％N20toN2at450degreecentigradeInaddition,thepaperalsoresearchedthecatalyticactivityofperovskite-likemixed、析mthealkalineearthcarbonate．ItWasfoundthatthecatalyticactivityofperovskite—likemixed塒也20％BaC03mayberaised．ThemixtureofSrC03orCaC03wasnotsignificantlyaffectedonthecata
7、lyticactivity．Keywords：perovskite—likeoxides；N20catalyticdecomposition；alkalineearthmetal．Ⅱ．目錄’第1章緒論1．1氧化亞氮的化學(xué)性質(zhì)及用途氧化亞氮又稱笑氣，無色有甜味氣體，是一種氧化劑，在一定條件下能支持燃燒(同氧氣，因?yàn)樾庠诟邷叵履芊纸獬傻獨(dú)夂脱鯕?，但在室溫下穩(wěn)定，有輕微麻醉作用，并能致人發(fā)笑。其麻醉作用于1799年由英國化學(xué)家漢弗萊·戴維發(fā)現(xiàn)。有關(guān)理論認(rèn)為N20與C02分子具有相似的結(jié)構(gòu)(包括電子式)，則其空間構(gòu)型是直線型，N20為極性分子，早期被用于牙
8、科手術(shù)的麻醉劑，是人類最早應(yīng)用于醫(yī)療的麻醉劑之一。它可由NH4N03在微熱條件下分解產(chǎn)生，產(chǎn)物
