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1、石油學(xué)報(石油加工)2014年12月ACTAPETROLEISINICA(PETROIEUMPROCESSINGSECT10N)第3O卷第6期文章編號:1001—8719(2014)06—0990—07AgY分子篩對燃料油中噻吩及苯并噻吩的吸附性能張志剛,張振科,范俊剛,蘭海葉,李文秀(沈陽化工大學(xué)遼寧省化工分離技術(shù)重點實驗室,遼寧沈陽110142)摘要:采用固相離子交換法制備了AgY分子篩,通過靜態(tài)吸附實驗,研究了AgY分子篩對模擬燃料油中有機(jī)硫化物噻吩(T)和苯并噻吩(BT)的吸附平衡和吸附動力學(xué)特性,并用Freundlich、Langmuir、Toth吸附模
2、型以及準(zhǔn)階和修正的準(zhǔn)階動力學(xué)方程分別對吸附平衡數(shù)據(jù)和吸附動力學(xué)數(shù)據(jù)進(jìn)行擬合,同時分析AgY分子篩吸附T和BT過程中的質(zhì)量傳遞和顆粒內(nèi)擴(kuò)散。結(jié)果表明,Langmuir、Toth吸附模型和修正的準(zhǔn)階動力學(xué)方程能夠很好地描述AgY分子篩對燃料油中T及BT的吸附行為,且AgY對BT的吸附能力強(qiáng)于對T的吸附;T和BT從溶液中傳遞到吸附劑外表面是一個非??焖俚倪^程,隨著顆粒內(nèi)部擴(kuò)散的進(jìn)行,擴(kuò)散速率逐漸減慢直至平衡,顆粒內(nèi)部擴(kuò)散對BT的影響較大。關(guān)鍵詞:AgY分子篩;固相離子交換;吸附平衡;動力學(xué)中圖分類號:TQ028.3,TQ424.25文獻(xiàn)標(biāo)識碼:Adoi:10.3969/
3、j.issn.10018719.2O14.06.005AdsorptivePerformanceofSynthesizedAgYZeoliteforThiopheneandBenz0thi0pheneinFuelZHANGZhigang,ZHANGZhenke,F(xiàn)ANJungang,LANHaiye,LIWenxiu(LiaoningProvincialKeyLaboratoryofChemicalSeparationTechnology,ShenyangUniversityofChemicalTechnology,Shenyangl10142,Cbi*gDAbs
4、tract:AgYzeolitewaspreparedviasolidstateionexchangedmethodundertheconditionofN2athightemperature.Adsorptivedesulfurizationofmodelfuelwasconductedinabatchreactortoevaluatetheequilibriumandkineticsoftheorganicsulfurcompoundsthiophene(T)andbenzothiophene(BT)adsorptionontoAgYzeolite.Adsor
5、ptionequilibriumdatawerefittedwithFreundlich,LangmuirandTothadsorptionmodels,andpseudo一一orderequationandmodifiedpseudo—n—orderequationwasusedtofitthekineticoftheadsorptionprocess.Themasstransferanalysisandintra—particlediffusionanalysisduringtheadsorptionofTandBTonAgYwerecarriedout.Th
6、eresultsshowedthattheequilibriumadsorptiondatawerefittedtoLangmuireandTothmodelsandtheBTinteractedwithzeolitemorestronglythanT.Thecorrespondingparametersandcorrelationcoefficientsofeachmodelwereobtained,whichcouldbeusedtopredicttheTandBTadsorptiononAgYzeolite.ThetransferprocessofTandB
7、Tftomrue1oilontotheadsorbentwasrapidenough,andTandBTdiffusedquicklyintheinitialadsorptionstage,andthenintra—particlediffusionsloweddownandstabilized.Theinfluenceofintra—particlediffusiononBTwasstrongerthanthatonT.Keywords:AgYzeolite;solidstateionexchange;adsorptionequilibrium;kinetics
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