資源描述:
《苯并噻吩在酸改性NaY分子篩上的吸附.pdf》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫(kù)。
1、第43卷第1期燃料化學(xué)學(xué)報(bào)Vo1.43NO.12015年1月JournalofFuelChemistryandTechnologyJan.2O15文章編號(hào):0253—2409(2015)01-0116-06苯并噻吩在酸改性NaY分子篩上的吸附孫慧穎,甘海軍,孫林平(長(zhǎng)春工業(yè)大學(xué)化工學(xué)院,吉林長(zhǎng)春130012)摘要:以NaY分子篩為母體,通過(guò)檸檬酸、磷酸改性分別得到吸附劑NaY—C和NaY—P。采用SEM、XRD、XRF、N2物理吸附及NH一TPD表征可知,檸檬酸改性后得到的NaY·C吸附劑介孔表面積增加,分子篩骨架結(jié)構(gòu)保持不變。同時(shí),磷酸改性使得Na
2、Y分子篩表面弱酸量減少?gòu)?qiáng)酸量增加,改性后所得吸附劑NaY—P的強(qiáng)酸量大于NaY—C。吸附實(shí)驗(yàn)表明,NaY—C和NaY—P均可完全脫除模擬油品中的苯并噻吩,同時(shí)NaY—C吸附劑對(duì)0柴油的脫硫能力優(yōu)于NaY—P吸附劑。再生實(shí)驗(yàn)中NaY—C和NaY—P吸附劑對(duì)模擬油品的脫硫率由第一次的100%分別下降至第6次的91.97%和85.96%。由此可知,檸檬酸改性NaY分子篩所得NaY—C吸附劑的脫硫能力優(yōu)于NaY—P,原因是吸附劑上的介孔更易于發(fā)生吸附脫硫。關(guān)鍵詞:NaY分子篩;苯并噻吩;檸檬酸;磷酸;吸附;再生中圖分類號(hào):0643文獻(xiàn)標(biāo)識(shí)碼: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選擇
8、性吸附脫硫因具備低能耗、設(shè)備操作簡(jiǎn)單、劑再生眭能不穩(wěn)定且操作步驟繁瑣¨”。選擇性高等優(yōu)點(diǎn)日益受到人們關(guān)注娟J