SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2019, Vol. 27 ›› Issue (12): 3036-3042.DOI: 10.1016/j.cjche.2019.03.021

• Materials and Product Engineering • 上一篇    下一篇

Controlling pore structures of Pd-doped organosilica membranes by calcination atmosphere for gas separation

Yibin Wei, Hengfei Zhang, Jiaojiao Lei, Huating Song, Hong Qi   

  1. State Key Laboratory of Material-Oriented Chemical Engineering, Membrane Science and Technology Research Center, Nanjing Tech University, Nanjing 210009, China
  • 收稿日期:2018-12-24 修回日期:2019-03-13 出版日期:2019-12-28 发布日期:2020-03-17
  • 通讯作者: Hong Qi
  • 基金资助:
    Supported by the National Natural Science Foundation of China (21276123, 21490581), the National High Technology Research and Development Program of China (2012AA03A606) and the "Summit of the Six Top Talents" Program of Jiangsu Province.

Controlling pore structures of Pd-doped organosilica membranes by calcination atmosphere for gas separation

Yibin Wei, Hengfei Zhang, Jiaojiao Lei, Huating Song, Hong Qi   

  1. State Key Laboratory of Material-Oriented Chemical Engineering, Membrane Science and Technology Research Center, Nanjing Tech University, Nanjing 210009, China
  • Received:2018-12-24 Revised:2019-03-13 Online:2019-12-28 Published:2020-03-17
  • Contact: Hong Qi
  • Supported by:
    Supported by the National Natural Science Foundation of China (21276123, 21490581), the National High Technology Research and Development Program of China (2012AA03A606) and the "Summit of the Six Top Talents" Program of Jiangsu Province.

摘要: 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.

关键词: Pd doping, Organosilica membrane, Calcination atmosphere, Gas separation

Abstract: 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.

Key words: Pd doping, Organosilica membrane, Calcination atmosphere, Gas separation