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《EU-1复合分子筛的合成与表征.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第4O卷第3期当代化工Vo1.4O.No.32011年3月ContemporaryChemicalIndustryMarch。2011MOR/EU一1复合分子筛的合成与表征时启涛,孙万付,张志智,张喜文,凌风香,秦波,闫萍L(I.辽宁石油化工大学,辽宁抚顺i13001;2.中石化抚顺石油化工研究院,辽宁抚顺113000)摘要:首次以TEABr为模板剂,EU一1为铝源,水热晶化合成复合分子筛MOR/EU一1。在合适的EU一1晶种添加量(m(EU一1)/m(SiOz)≤2)、模板剂添加量0.25≤n(TEABr)/n(SiO:)≤0.4、碱量1.16~2、iO)≤1.71以及合适的晶化时间(48~96h)和晶化温度(140~170℃)下,合成出了结晶度较好的MOR/EU一1复合分子筛,并采用XRD、FT—IR、N:吸附一脱附等温线和SEM对样品进行了表征。结果表明,样品的XRD谱图上同时出现了MOR和EU一1的衍射峰;IR谱图上也同时出现了MOR和EU一1的吸收谱带,并且合成样品与两种分子筛的机械混合物有一定的差别;N:吸附一脱附等温线证明复合分子筛含有较多的次级介孔结构;从SEM照片可以看出,发现复合分子筛形貌和机械混合物显著不同,呈现出一种小颗粒的团聚体。关键词:EU一1;MOR;复合分子筛;合成中图分类号:TQ4243、.2文献标识码:A文章编号:1671-0460(2011)03—0260—05SynthesisandCharacterizationofMOR/EU一1CompositeMolecularSievesSHIQi-tao,SUNWan-fit2,ZHANGZhi-zhi2,ZHANGXi—Well,LINGFeng-xiang2,QINBo,YANPing工(1.LiaoningShihuaUniversity,LiaoningFushun113001,China;2.FushunResearchInstituteofPetroleumandPetrichemicals,4、LiaoningFushun113000,China)Abstract:EU一1/MORcompositemolecularsievewassynthesizedwithTEABrasorganictemplateandEU一1asaluminumresources.Highcrystallinedegreecanbeobtainedunderfollowingconditions:m(EU·1)/m(SiO2)~<2,O.25≤n(TEABr)/n(SiO2)≤O.4,1.16<~n(NaOH)/n(SiO2)≤1.71,crystallizationtime48~965、handtemperaturel4O~170℃,respectively.ThensynthesizedsamplewascharacterizedbyXRD.FTIRandSEM.TheresultsshowthatXRDpatternofthesynthesizedsampleappearsMORandEU一1diffractionpeakssimultaneously;IRspectraofthesynthesizedsamplealsoappearscharacteristicabsorptionbandsofmicroporousMORandmicroporou6、sEU.1molecularsievessimultaneously,andIRsDectraofthecompositemolecularsieveshascleardifferencewithIRspectraofmeehanicaImixtureofmicroporousMORandmicroporousEU—lmolecularsieves.TheN,absorptionanddesorptionisothermsofthesynthesizedsamplesshowthatthecompositemolecularsievehasmoresecondarymes7、0porousstructure.TheSEMimagesofthecompositezeoliteshowthatitsmorphologyisaggregatesofsmallparticles,differentfromthemechanicalmixture’smorphology.Keywords:EU-l:M0R;Compositemolecularsieve;Synthesis复合分子筛是由两种或多种分子筛形成的共结子筛,由于孔道维数和孔道结构的特殊性,该沸石晶,或具有两种或多种分子筛结构特征的复合晶体,在催化反
2、iO)≤1.71以及合适的晶化时间(48~96h)和晶化温度(140~170℃)下,合成出了结晶度较好的MOR/EU一1复合分子筛,并采用XRD、FT—IR、N:吸附一脱附等温线和SEM对样品进行了表征。结果表明,样品的XRD谱图上同时出现了MOR和EU一1的衍射峰;IR谱图上也同时出现了MOR和EU一1的吸收谱带,并且合成样品与两种分子筛的机械混合物有一定的差别;N:吸附一脱附等温线证明复合分子筛含有较多的次级介孔结构;从SEM照片可以看出,发现复合分子筛形貌和机械混合物显著不同,呈现出一种小颗粒的团聚体。关键词:EU一1;MOR;复合分子筛;合成中图分类号:TQ424
3、.2文献标识码:A文章编号:1671-0460(2011)03—0260—05SynthesisandCharacterizationofMOR/EU一1CompositeMolecularSievesSHIQi-tao,SUNWan-fit2,ZHANGZhi-zhi2,ZHANGXi—Well,LINGFeng-xiang2,QINBo,YANPing工(1.LiaoningShihuaUniversity,LiaoningFushun113001,China;2.FushunResearchInstituteofPetroleumandPetrichemicals,
4、LiaoningFushun113000,China)Abstract:EU一1/MORcompositemolecularsievewassynthesizedwithTEABrasorganictemplateandEU一1asaluminumresources.Highcrystallinedegreecanbeobtainedunderfollowingconditions:m(EU·1)/m(SiO2)~<2,O.25≤n(TEABr)/n(SiO2)≤O.4,1.16<~n(NaOH)/n(SiO2)≤1.71,crystallizationtime48~96
5、handtemperaturel4O~170℃,respectively.ThensynthesizedsamplewascharacterizedbyXRD.FTIRandSEM.TheresultsshowthatXRDpatternofthesynthesizedsampleappearsMORandEU一1diffractionpeakssimultaneously;IRspectraofthesynthesizedsamplealsoappearscharacteristicabsorptionbandsofmicroporousMORandmicroporou
6、sEU.1molecularsievessimultaneously,andIRsDectraofthecompositemolecularsieveshascleardifferencewithIRspectraofmeehanicaImixtureofmicroporousMORandmicroporousEU—lmolecularsieves.TheN,absorptionanddesorptionisothermsofthesynthesizedsamplesshowthatthecompositemolecularsievehasmoresecondarymes
7、0porousstructure.TheSEMimagesofthecompositezeoliteshowthatitsmorphologyisaggregatesofsmallparticles,differentfromthemechanicalmixture’smorphology.Keywords:EU-l:M0R;Compositemolecularsieve;Synthesis复合分子筛是由两种或多种分子筛形成的共结子筛,由于孔道维数和孔道结构的特殊性,该沸石晶,或具有两种或多种分子筛结构特征的复合晶体,在催化反
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