【摘要】 在多孔管状莫来石支撑体外表面水热合成TS-1型分子筛膜.讨论了合成配比、合成温度、晶种引入等因素对膜合成的影响.采用X射线衍射仪(XRD)、红外光谱仪(FT-IR)、紫外可见分光光度计(UV-VIS)和扫描电子显微镜(SEM)对TS-1分子筛及分子筛膜进行了表征.通过乙醇-水混合物对膜的渗透汽化分离性能进行检测.结果表明,Ti进入了分子筛的骨架中,且最佳n(TiO2)/n(SiO2)=0.02,最佳合成温度200℃,采用原位法可以获得缺陷较少的TS-1分子筛膜.该膜对乙醇具有较好的选择性,分离因子为62,通量为0.76 kg/(m2.h).更多还原

【Abstract】 TS-1 zeolite membranes were prepared hydrothermally on the outer-surface of porous mullite tubular supports.The effects of synthesis conditions,including composition,synthesis temperature,and seeds,were studied.The as-synthesized TS-1 zeolite and membranes were characterized by X-ray diffraction(XRD),Fourier transform infrared spectrometry(FT-IR),UV-Visible spectrophotometer(UV-VIS),and scaning electron microscope(SEM).The membrane pervaporation separation properties for a feed ethanol-water mixture were tested.The results demonstrated that,Ti had come into framework of zeolite membranes,the better n(TiO2)/n(SiO2) was 0.02,the better synthetic temperature was 200℃,and the membranes with less defects can be obtained by in-situ method.The zeolite membrane displayed good ethanol selectivity,and it had a separation factor of 62 with a flux of 0.76 kg/(m2·h).更多还原