TY - JOUR
T1 - Fabrication of organic-inorganic hybrid silica membranes for gas separation by alkane-bridged silsesquioxanes as precursors
AU - Song, Shuangshuang
AU - Song, Huating
AU - Wang, Chenying
AU - Qi, Hong
N1 - Publisher Copyright:
© 2016, Editorial Department of Journal of the Chinese Ceramic Society. All right reserved.
PY - 2016/12/1
Y1 - 2016/12/1
N2 - Organic-inorganic hybrid silica sols based on bis(triethoxysilyl)methane (BTESM), 1,2-bis(triethoxysilyl)-ethane (BTESE) and 1,8-bis(triethoxysilyl)octane (BTESO) were prepared via a polymeric sol-gel process. The effects of precursor concentration and hydrolysis ratio on the properties (i.e. state, average particle size and particle size distribution) of three kinds of polymeric sols were also investigated. The properties of the organic-inorganic hybrid SiO2 powders were characterized by thermo-gravimetric/differential scanning calorimeter analysis (TG/DSC) and CO2 adsorption. The gas separation performance of BTESM, BTESE and BTESO membranes was evaluated via single gas permeation experiments. At 200℃ and 0.3 MPa, the BTESM membrane has a H2 permeance of 5.6×10-7 mol/(m2·s·Pa), and the permselectivities for H2/CO2, H2/N2 and H2/CH4 are 6.1, 26.7 and 50.9, respectively. Moreover, the N2, CH4 and SF6 permeances of the organic-inorganic hybrid SiO2 membranes increase as the number of carbon atoms in the alkane bridge of silsesquioxanes increases.
AB - Organic-inorganic hybrid silica sols based on bis(triethoxysilyl)methane (BTESM), 1,2-bis(triethoxysilyl)-ethane (BTESE) and 1,8-bis(triethoxysilyl)octane (BTESO) were prepared via a polymeric sol-gel process. The effects of precursor concentration and hydrolysis ratio on the properties (i.e. state, average particle size and particle size distribution) of three kinds of polymeric sols were also investigated. The properties of the organic-inorganic hybrid SiO2 powders were characterized by thermo-gravimetric/differential scanning calorimeter analysis (TG/DSC) and CO2 adsorption. The gas separation performance of BTESM, BTESE and BTESO membranes was evaluated via single gas permeation experiments. At 200℃ and 0.3 MPa, the BTESM membrane has a H2 permeance of 5.6×10-7 mol/(m2·s·Pa), and the permselectivities for H2/CO2, H2/N2 and H2/CH4 are 6.1, 26.7 and 50.9, respectively. Moreover, the N2, CH4 and SF6 permeances of the organic-inorganic hybrid SiO2 membranes increase as the number of carbon atoms in the alkane bridge of silsesquioxanes increases.
KW - Alkane-bridged silsesquioxanes
KW - Gas separation
KW - Microporous membrane
KW - Sol-gel
UR - http://www.scopus.com/inward/record.url?scp=85008403583&partnerID=8YFLogxK
U2 - 10.14062/j.issn.0454-5648.2016.12.13
DO - 10.14062/j.issn.0454-5648.2016.12.13
M3 - 文章
AN - SCOPUS:85008403583
SN - 0454-5648
VL - 44
SP - 1760
EP - 1767
JO - Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society
JF - Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society
IS - 12
ER -