Microwave synthesis of high-flux NaY zeolite membranes in fluoride media
作者： Na Hu , Yihong Zheng , Zhen Yang , Rongfei Zhou , Xiangshu Chen
DOI: 10.1039/C5RA13760H
关键词: Methanol 、 Membrane 、 Kinetic diameter 、 Fluoride 、 Pervaporation 、 Aqueous solution 、 Concentration polarization 、 Zeolite 、 Chemical engineering 、 Inorganic chemistry 、 Chemistry
摘要: High-flux NaY zeolite membranes were synthesized using low-cost mullite supports by microwave heating in fluoride media. Pervaporation and vapor permeation performances of these evaluated at temperature range 303–383 K. The thickness membrane prepared was thinner than that conventional heating. Six displayed fluxes 3.43 ± 0.13 kg (m2 h)−1 separation factors 1300 390 for a 95 wt% n-butanol aqueous solution 348 water 60–80% higher those Water water/alcohol increased with the increasing kinetic diameter alcohols water/methanol, water/ethanol, water/i-propanol water/n-butanol binary mixtures. separations mixtures through high-flux affected concentration polarization. Increasing flow rates from 9.5 L h−1 (Reynolds number = 1300, laminar state) to 37.8 5200, turbulent 363 K decreased polarization boundary layer, thus flux selectivity 26% 23%, respectively.
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