季铵盐型改性淀粉辅助蒸汽相法合成多级孔EU-1沸石及其催化性能  

Synthesis of hierarchical EU-1 zeolite using quaternary ammonium salt modified starch assisted vapor phase method and its catalytic performance

作　　者：刘晓臻[1] 李晓峰[1] 高萌[1] 高李霞[1] 刘永梅[1] 窦涛[1,2] 

机构地区：[1]太原理工大学精细化工研究所,山西太原030024 [2]中国石油大学化工学院CNPC催化重点实验室,北京102249

出　　处：《日用化学工业》2016年第8期462-466,共5页China Surfactant Detergent & Cosmetics

基　　金：国家自然科学基金资助项目(20973123);国家科技型中小企业技术创新项目(14C26211400552)

摘　　要：以季铵盐型改性淀粉为介孔模板,采用蒸汽相法成功合成多级孔EU-1沸石。通过XRD,FT-IR,SEM,N_2吸附-脱附和NH_3-TPD等手段对合成样品的物化性质进行表征。研究表明:通过调节季铵盐型改性淀粉的量,样品的介孔孔容增加了0.081 cm^3/g,外表面积增加了23.35 cm^2/g。通过二甲苯异构化测试来考察样品的催化性能,发现:对二甲苯(PX)平衡浓度提高了0.88个百分点,乙苯的转化率提高了8.47个百分点,C_8烃收率提高了1.66个百分点。Using quaternary ammonium salt modified starch as mesoporous template, hierarchical EU - 1 zeolite was synthesized by vapor phase method. The physieoehemical properties of the synthesized samples were characterized by XRD, FT - IR, SEM, N2 adsorption -desorption and NH3 - TPD. The results showed that by regulating the dosage of quaternary ammonium salt modified starch, the mesoporous pore volume of the sample is increased by 0. 081 cma/g and the apparent surface area of the sample is increased by 23.35 cm2/g. The catalytic performance of the samples is examined by xylene isomerization test. The results showed that the equilibrium concentration of PX is increased by 0. 88 percent points, the ethylbenzene conversion is increased by 8.47 percent points and the yield of C8 hydrocarbons is increased by 1.66 oereent ooints.

关 键 词：EU-1沸石 季铵盐型改性淀粉 蒸汽相法 多级孔 

分 类 号：O643.36[理学—物理化学]