Synthesis of zeolite NaA membranes with high performance and high reproducibility on coarse macroporous supports
Synthesis of zeolite NaA membranes with high performance and high reproducibility on coarse macroporous supports
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在粗大孔载体上合成高性能、高重复性的 NaA 沸石膜
DOI：
10.1016/j.memsci.2013.04.030
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发表时间：
2013-10
影响因子：
9.5
通讯作者：
Jianhua Yang ,
中科院分区：
文献类型：
--
作者：
Huazheng Li;JinquWang;Jing Xu;Xiangdi Meng;Bo Xu;Jianhua Yang ,
以廉价的粗大孔载体为载体，采用变温热浸渍种子法(VTHD)一次二次生长法制备了中试规模的高PV性能NAA沸石膜。通过VTHD方法，可以将由大小不同的NAA种子组成的薄、致密且无针孔的非对称NAA种子层操纵到粗大大孔载体的表面。较大的NAA晶种主要作为填料，以减小载体的孔径，而较小的NAA晶种主要作为晶核，为NAA晶体的生长提供场所。考察了种子悬浮液浓度、种子粒大小和包膜温度对种子层形态和NAA膜分离性能的影响。VTHD方法的重复性高达70%。该方法制备的NaA型沸石膜在343K下脱水90wt%乙醇/10wt%水的水通量为2.85g/m−2 h−1，分离系数大于10000。廉价的大孔载体的使用和VTHD方法的高重复性为大规模商业化生产低成本的NaA型沸石膜提供了可行性，促进了NaA型沸石膜的广泛应用。
Pilot-scale zeolite NaA membranes with high PV performance supported on cheap coarse macroporous supports were prepared by one single secondary growth using varying temperature hot dip-coating seeding method (VTHD). Through the VTHD method, a thin, dense and pinhole-free asymmetric NaA seed layer composed of large and small NaA seeds could be manipulated onto the surface of a coarse macroporous support. The large NaA seeds mainly acted as fillers to reduce the pore sizes of the support while the small NaA seeds acted as nuclei to provide sites for NaA crystal growth. The effects of the seed suspension concentrations, the seed sizes and coating temperature on the morphology of the seed layer and the separation performance of the resulting NaA membranes were investigated. The reproducibility of the VTHD method was as high as 70%. The zeolite NaA membrane prepared by the VTHD method showed a water flux of 2.85 kg m−2h−1with a separation factor over 10,000 in dehydrating the 90 wt% ethanol/10 wt% water mixture at 343 K. The use of a cheap macroporous support and the high reproducibility of the VTHD method provide the feasibility for large-scale commercial production of low cost zeolite NaA membranes, promoting the broad application of zeolite NaA membranes.
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影响因子：
--
作者：
L. Tosheva;B. Mihailova;Lik H. Wee;B. Gasharova;K. Garbev;A. Doyle
通讯作者：
L. Tosheva;B. Mihailova;Lik H. Wee;B. Gasharova;K. Garbev;A. Doyle
影响因子：
3.9
作者：
Gu Xuehong;Yang Gang;Xing Weihong;Xu Nanping
通讯作者：
Xu Nanping
影响因子：
6.6
作者：
Arvand, Majid;Kermanian, Maryam;Zanjanchi, Mohammad A.
通讯作者：
Zanjanchi, Mohammad A.
DOI：
10.1021/la1048425
发表时间：
2011-02
期刊：
Langmuir : the ACS journal of surfaces and colloids
影响因子：
--
作者：
Yi Liu;Yanshuo Li;Weishen Yang
通讯作者：
Yi Liu;Yanshuo Li;Weishen Yang
影响因子：
9.5
作者：
W. Xiao;Jianhua Yang;Jinming Lu;Jinqu Wang
通讯作者：
W. Xiao;Jianhua Yang;Jinming Lu;Jinqu Wang