Selective water vapor permeation from steam/non-condensable gas mixtures via organosilica membranes at moderate-to-high temperatures
Selective water vapor permeation from steam/non-condensable gas mixtures via organosilica membranes at moderate-to-high temperatures
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DOI：
10.1016/j.memsci.2019.117254
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发表时间：
2019-11-01
影响因子：
9.5
通讯作者：
Tsuru, Toshinori
中科院分区：
文献类型：
--
作者：
Moriyama, Norihiro;Nagasawa, Hiroki;Tsuru, Toshinori
从潮湿气流中去除水蒸气对于发电厂的蒸汽回收和产生水作为副产品的膜反应器的反应增强等都是重要的。有机硅膜在这些领域的未来应用前景促使本研究利用1,2-二（三乙氧基硅基）乙烷（BTESE）衍生膜对潮湿气体分离性能进行研究。在这项工作中，在80到200摄氏度的温度范围内，在0.1到0.9的水摩尔分数范围内，在btese衍生的膜上进行了二元湿气体分离（H2O/H-2和H2O/N-2）。H2O/H-2和H2O/N-2的渗透率和渗透率比与温度和蒸汽压有关，并与温度和蒸汽压同时影响的水吸附势相关。水/ h -2和H2O/N-2的水渗透通量、渗透率和渗透率比的最高水平分别为37 kg/(m(2)h)、5.5 x 10(-6) mol/(m(2)s Pa)、84和无穷大（bbb6700），温度为150℃，水在膜上的分压差为107 kPa。btese衍生的有机二氧化硅膜的高性能显示了它们未来在中高温潮湿气体分离中的应用前景。
The removal of water vapor from humid gas streams is important for steam recovery in power plants and reaction enhancement in a membrane reactor that produces water as a by-product, and so on. The prospect of future applications for organosilica membranes in these fields prompted the present investigation of humid gas separation properties via 1,2-bis(triethoxysilyl)ethane (BTESE)-derived membranes. In this work, binary humid gas separation (H2O/H-2 and H2O/N-2) was performed on BTESE-derived membranes at temperatures ranging from 80 to 200 degrees C under feeds of water mole fractions ranging from 0.1 to 0.9. Permeance and the permeance ratios of H2O/H-2 and H2O/N-2 were confirmed to be dependent on temperature and vapor pressure, and found to be correlated using the water adsorption potential, which accounted for both the temperature and the vapor pressure. The highest levels of water permeate flux, permeance, and permeance ratios of H2O/H-2 and H2O/N-2 were 37 kg/(m(2)h), 5.5 x 10(-6) mol/(m(2)s Pa)), and 84 and infinity ( > 6700), respectively, at 150 degrees C where the partial pressure difference of water across the membrane was 107 kPa. The high performance of BTESE-derived organosilica membranes shows promise for their future applications in humid gas separation at moderate-to-high temperatures.