TY - JOUR
T1 - Controlling pore structures of Pd-doped organosilica membranes by calcination atmosphere for gas separation
AU - Wei, Yibin
AU - Zhang, Hengfei
AU - Lei, Jiaojiao
AU - Song, Huating
AU - Qi, Hong
N1 - Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/12
Y1 - 2019/12
N2 - Pd-doped organosilica membranes were prepared by controlling calcination atmospheres (i.e. POS-Air, POS-N2, POS-H2, POS-H2/N2) to tailor their networks for improving their gas separation performance. This study shows that Pd (II) could be only maintained under non-reductive calcination atmosphere, while inert and reducing calcination atmosphere is more beneficial to maintain organosilica moieties in POS networks. POS-H2/N2 membrane showed the optimal H2 separation performance that its permselectivities for H2/CO2, H2/N2, H2/CH4 and H2/SF6 are 15.0, 96.7, 173.0 and 3400.0, respectively. Moreover, it is found that H2 molecules pass through the four membranes based on activated diffusion, while CO2 molecules permeation through POS-N2 and POS-Air membrane is dominated by surface diffusion. This work may provide insight into the understanding of the calcination atmosphere effect on gas separation performance of metal-doped organosilica membranes.
AB - Pd-doped organosilica membranes were prepared by controlling calcination atmospheres (i.e. POS-Air, POS-N2, POS-H2, POS-H2/N2) to tailor their networks for improving their gas separation performance. This study shows that Pd (II) could be only maintained under non-reductive calcination atmosphere, while inert and reducing calcination atmosphere is more beneficial to maintain organosilica moieties in POS networks. POS-H2/N2 membrane showed the optimal H2 separation performance that its permselectivities for H2/CO2, H2/N2, H2/CH4 and H2/SF6 are 15.0, 96.7, 173.0 and 3400.0, respectively. Moreover, it is found that H2 molecules pass through the four membranes based on activated diffusion, while CO2 molecules permeation through POS-N2 and POS-Air membrane is dominated by surface diffusion. This work may provide insight into the understanding of the calcination atmosphere effect on gas separation performance of metal-doped organosilica membranes.
KW - Calcination atmosphere
KW - Gas separation
KW - Organosilica membrane
KW - Pd doping
UR - http://www.scopus.com/inward/record.url?scp=85066477537&partnerID=8YFLogxK
U2 - 10.1016/j.cjche.2019.03.021
DO - 10.1016/j.cjche.2019.03.021
M3 - 文章
AN - SCOPUS:85066477537
SN - 1004-9541
VL - 27
SP - 3036
EP - 3042
JO - Chinese Journal of Chemical Engineering
JF - Chinese Journal of Chemical Engineering
IS - 12
ER -