Effect of calcination temperature on the PV dehydration performance of alcohol aqueous solutions through BTESE-derived silica membranes
Effect of calcination temperature on the PV dehydration performance of alcohol aqueous solutions through BTESE-derived silica membranes
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DOI：
10.1016/j.memsci.2012.05.073
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发表时间：
2012-10
影响因子：
9.5
通讯作者：
Jinhui Wang;M. Kanezashi;Tomohisa Yoshioka;T. Tsuru
中科院分区：
文献类型：
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作者：
Jinhui Wang;M. Kanezashi;Tomohisa Yoshioka;T. Tsuru
以1，2-双(三乙氧基硅基)乙烷(BTESE)为原料，采用Sol-Gel法制备了有机-无机杂化膜，考察了100~300℃烧成温度对膜分离性能的影响。接触角、热重(TG)和红外(IR)光谱表明，膜的结构随顶层烧成温度的变化而变化。在100℃下焙烧制备的BTESE-100的He渗透率为2.2×10−7mol/(m2sPa.)，He/SF6分离系数约为140；而在300℃下焙烧制备的BTESE-300的He/SF6约为3000，He渗透率为1.5×10−6mol/(m2sPa.在75℃下对90wt%异丙醇(IPA)水溶液进行渗透汽化脱水时，BTESE-100和BTESE-300的水通量分别为2.51和3.40 kg/(M2h)，分离系数分别为130和4370。此外，BTESE-100在10h以上的时间内表现出稳定的PV通量和分离因子，证实了BTESE-100膜的成功制备。
Organic-inorganic hybrid membranes from 1,2-bis (triethoxysilyl)ethane (BTESE) were prepared by sol-gel processing, and we examined the effects of firing temperatures ranging from 100 to 300°C on membrane separation performance. The contact angle, thermogravimetric (TG) and infrared (IR) spectrum showed that the structure of the membrane changed with top-layer firing temperatures. BTESE-100, prepared by firing at 100°C, showed an He permeance of 2.2×10−7mol/(m2sPa) with a He/SF6separation factor of about 140, while BTESE-300, prepared by firing at 300°C, showed a He/SF6of about 3000 with an He permeance of 1.5×10−6mol/(m2sPa). In pervaporation (PV) dehydration of a 90wt% isopropanol (IPA) aqueous solution at 75°C, BTESE-100 and BTESE-300 showed water fluxes of 2.51 and 3.40 kg/(m2h) with separation factors of 130 and 4370, respectively. Moreover, BTESE-100 showed a stable PV flux and separation factor for more than 10h, confirming the successful preparation of BTESE membranes at low firing temperatures.