改性ZSM-5分子筛膜错流过滤分离苯并噻吩/3-甲基噻吩  

ZSM-5 zeolite membrane separation performance of BT/3-MT by cross-flow filtration

作　　者：王波[1] 居沈贵[1] 

机构地区：[1]南京工业大学化学化工学院,江苏南京210009

出　　处：《南京工业大学学报（自然科学版）》2013年第3期30-35,共6页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：国家自然科学基金(21176118)

摘　　要：二次水热合成法制得ZSM-5分子筛膜,经X线衍射光谱仪(XRD)和扫描电子显微镜(SEM)表征后,确定所合成为ZSM-5分子筛膜,对其进行Ag+、Cu2+、Zn2+金属离子改性,错流过滤下分离含苯并噻吩/3-甲基噻吩的正己烷模拟汽油,并考察了离子浓度、活化温度、再生时间、再生次数对脱硫效果的影响。结果表明:负载浓度为0.2mol/L的Ag+对苯并噻吩/3-甲基噻吩的脱除率可达75%,分离因子最大接近1.6;活化温度在550℃时脱硫效果最佳;使用后的膜经再生4 h、再生2次以内可恢复一定的性能。ZSM-5 zeolite membranes were prepared by a second-step hydrothermal synthesis method and characterized by X-ray diffraction （XRD） and scanning electron microscope （SEM）. The membranes were modified by Ag ＋ , Cu2＋ , Zn2＋ metal ions and used to remove benzothiophene/3-methylthiophene （BT/3-MT） from n-hexane by cross-flow filtration. Effects of ion concentration, activation temperature, re- generation time and regeneration frequencies on desulfurization were studied. The results showed that the best separation factor amounted to 1.6 and the desulfurization ratio amounted to 75% when ZSM-5 zeolite loaded with 0. 2 mol/L Ag ＋ solution. The most suitable activation temperature was 550℃. The used membranes could restore certain performance when regeneration time was 4 h and regenerated twice.

关 键 词：ZSM-5分子筛膜 改性 苯并噻吩 3-甲基噻吩 

分 类 号：TQ028[化学工程]