无机材料学报2018，Vol.33Issue(3)：339-344,6.DOI:10.15541/jim20170174
四通道中空纤维NaA分子筛内膜的制备与表征
Preparation and Characterization of NaA Zeolite Membranes on Inner-surface of Four-channel Ceramic Hollow Fibers
摘要
Abstract
High-performance NaA zeolite membranes were prepared on inner-surface of four-channel ceramic hol-low fibers by combined counter-diffusion vacuum seeding and dynamic hydrothermal synthesis method. The as-prepared membranes were adopted to the pervaporation dehydration of 90wt% ethanol/water mixture at 75℃. Effects of seeding and synthesis conditions on morphology and separation performance of the membranes were extensively investigated in terms of flow rate of seed suspension, seeding time and synthesis temperature. These results showed that dense and uniform NaA zeolite membrane was obtained when the flow rate of seed suspension was 100 mL/h and the seeding time was 5 s. Over slow flow rate of seed suspension or too long seeding time in-creased the membrane thickness but generated defects on membrane surface simultaneously. When the NaA zeolite membrane was hydrothermally synthesized at 100℃ for twice, the membrane achieved the best water/ethanol separation factor of 1585 while the permeation flux was 8.8 kg/(m2·h) in the pervaporation dehydration. Lower synthesis temperature led to incomplete membrane crystallization and some defects were observed on the mem-brane surface. With excessive synthesis temperature defects were also detected in the cross-section of the membrane due to the over rapid crystallite rate, which resulted in poor separation performance of the membrane.关键词
四通道中空纤维/NaA分子筛膜/内膜/渗透汽化Key words
four-channel hollow fiber/NaA zeolite membrane/inner membrane/pervaporation分类
化学化工引用本文复制引用
王晓磊,张玉亭,高冰,张春,顾学红..四通道中空纤维NaA分子筛内膜的制备与表征[J].无机材料学报,2018,33(3):339-344,6.基金项目
国家863计划项目(2105AA03A602) （2105AA03A602）
国家自然科学基金(21490585,21606126)National High Technology Research and Development Program of China(2105AA03A602) （21490585,21606126）
National Natural Science Foundation of China(21490585,21606126) （21490585,21606126）
