TY - JOUR
T1 - Influence of sol-gel process parameters on the micro-structure and performance of hybrid silica membranes
AU - Qureshi, H.F.
AU - Nijmeijer, Arian
AU - Winnubst, Aloysius J.A.
PY - 2013
Y1 - 2013
N2 - A facile, versatile and reproducible sol–gel process to make microporous organosilica membranes by using 1,2-bis (triethoxysilyl) ethane (BTESE) as a precursor is reported. The influence of process parameters on sol particle size and rheology of BETSE-derived sols was investigated to produce defect-free composite membranes by a single dipping procedure and subsequent calcination. The
microporous structure of a BTESE layer on mesoporous alumina supports enabled selective molecular sieving of gas molecules. Single gas permeation (SGP) experiments, performed at 200 C, showed that a H2/CH4 permselectivity of 24 was reproducibly achieved. NoSF6 gas permeance through these membranes proof the presence of a defect-free microstructure. SEM cross-section analysis showed a hybrid selective layer with a thickness dependent on the sol precursor concentration.
AB - A facile, versatile and reproducible sol–gel process to make microporous organosilica membranes by using 1,2-bis (triethoxysilyl) ethane (BTESE) as a precursor is reported. The influence of process parameters on sol particle size and rheology of BETSE-derived sols was investigated to produce defect-free composite membranes by a single dipping procedure and subsequent calcination. The
microporous structure of a BTESE layer on mesoporous alumina supports enabled selective molecular sieving of gas molecules. Single gas permeation (SGP) experiments, performed at 200 C, showed that a H2/CH4 permselectivity of 24 was reproducibly achieved. NoSF6 gas permeance through these membranes proof the presence of a defect-free microstructure. SEM cross-section analysis showed a hybrid selective layer with a thickness dependent on the sol precursor concentration.
KW - METIS-296810
KW - IR-87830
U2 - 10.1016/j.memsci.2013.06.024
DO - 10.1016/j.memsci.2013.06.024
M3 - Article
SN - 0376-7388
VL - 446
SP - 19
EP - 25
JO - Journal of membrane science
JF - Journal of membrane science
ER -