苯并噻吩在酸改性NaY分子筛上的吸附.pdf

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1、第43卷第1期燃料化学学报Vo1．43NO．12015年1月JournalofFuelChemistryandTechnologyJan．2O15文章编号：0253—2409(2015)01-0116-06苯并噻吩在酸改性NaY分子筛上的吸附孙慧颖，甘海军，孙林平(长春工业大学化工学院，吉林长春130012)摘要：以NaY分子筛为母体，通过柠檬酸、磷酸改性分别得到吸附剂NaY—C和NaY—P。采用SEM、XRD、XRF、N2物理吸附及NH一TPD表征可知，柠檬酸改性后得到的NaY·C吸附剂介孔表面积增加，分子筛骨架结构保持不变。同时，磷酸改性使得Na

2、Y分子筛表面弱酸量减少强酸量增加，改性后所得吸附剂NaY—P的强酸量大于NaY—C。吸附实验表明，NaY—C和NaY—P均可完全脱除模拟油品中的苯并噻吩，同时NaY—C吸附剂对0柴油的脱硫能力优于NaY—P吸附剂。再生实验中NaY—C和NaY—P吸附剂对模拟油品的脱硫率由第一次的100％分别下降至第6次的91．97％和85．96％。由此可知，柠檬酸改性NaY分子筛所得NaY—C吸附剂的脱硫能力优于NaY—P，原因是吸附剂上的介孔更易于发生吸附脱硫。关键词：NaY分子筛；苯并噻吩；柠檬酸；磷酸；吸附；再生中图分类号：0643文献标识码：AAdsorpt

3、ionofbenzothiopheneoveracidmodifiedNaYzeolitesSUNHui．ying．GANHai-jun．SUNLin—ping(SchoolofChemicalEngineering，ChangchunUniversityofTechnology，Changchun130012，China)Abstract：NaY．CandNaY—PadsorbentsweresuccessfullyobtainedthroughmodifyingparentNaYzeolitewitllcitricacidandphosphate

4、acid，respectively．Theobtainedadsorbentswerecharacterizedbyscanningelectronmicroscope，X—raydiffraction，X—rayfluorescence，N2sorptionandtemperatureprogrammeddesorptionofNH3．ThemesoporesurfaceareaoftheNaY．CadsorbentwasincreasedwhentheparentNaYzeolitewasmodifiedbycitricacid．withpres

5、ervinghezeoliteskeletalstructure．Meanwhile，thedecreasedweakacidandincreasedstrongacidcontentwereobservedinNaYzeolitemodifiedwithphosphateacidaqueoussolutionandtheamountofstrongacidsitesintheNaY．PadsorbentwasmorethanintheNaY．Cadsorbent．Theadsorptiondesulfurizationresultsshowedth

6、attheNaY．CadsorbentexhibitedmuchhigherdesulfurizationactivitythantheNaY．PadsorbentintheNo．0dieseloil，althoughallbenzothiopheneinmodeldieselwasremovedoverboth．Inregenerationexperiment．thebenzothiopheneremovalofmodeldieseloildecreasedfrom100％to91．97％and85．96％aftersixregenerations

7、overNaYCandNaY．Padsorbents．respectively．Therefore，theNaY—Cadsorbentpossessedbetterdesulfurizationperformance，possiblybecausethemesoporeoftheadsorbentisbeneficialtotheadsorptiondesulfufization．Keywords：NaYzeolites；benzothiophene；citricacid；phosphateacid；adsorption；regeneration选择

8、性吸附脱硫因具备低能耗、设备操作简单、剂再生眭能不稳定且操作步骤繁琐¨”。选择性高等优点日益受到人们关注娟J