%0 Journal Article %A Yibin Wei %A Hengfei Zhang %A Jiaojiao Lei %A Huating Song %A Hong Qi %T Controlling pore structures of Pd-doped organosilica membranes by calcination atmosphere for gas separation %D 2019 %R 10.1016/j.cjche.2019.03.021 %J Chinese Journal of Chemical Engineering %P 3036-3042 %V 27 %N 12 %X 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. %U https://cjche.cip.com.cn/EN/10.1016/j.cjche.2019.03.021