Fabrication of Pd-Nb bimetallic doped organosilica membranes by different metal doping routes for H_(2)/CO_(2) separation

作     者：Hengfei Zhang Yibin Wei Shufeng Niu Hong Qi Hengfei Zhang;Yibin Wei;Shufeng Niu;Hong Qi

作者机构：State Key Laboratory of Material-Oriented Chemical EngineeringMembrane Science and Technology Research CenterNanjing Tech UniversityNanjing 210009China Hongyi Ceramic Membranes Research InstituteNanjing Hongyi Ceramic Nanofiltration Membranes Co.Ltd.Nanjing 210009China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2021年第34卷第8期

页      面：67-75页

核心收录：

学科分类：080706[工学-化工过程机械] 08[工学] 0807[工学-动力工程及工程热物理] 

基　　金：supported by the National Natural Science Foundation of China(21490581) China Petroleum&Chemical Corporation(317008-6) Guangxi Innovation Driven Development Foundation(AA17204092) 

主　　题：Hydrogen Separation Membranes Bimetallic doping Organosilica 

摘      要：Monometallic doping has proved its superiority in improving either permselectivity or H_(2) permeability of organosilica membranes for H_(2)/CO_(2) separation,but it is still challenging to break the trade-off ***,we report a series of Pd-Nb bimetallic doped 1,2-bis(triethoxysilyl)ethane(Pd-Nb-BTESE,PNB)membranes with different metal doping routes for simultaneously improving H_(2) permeance and H_(2)/CO_(2) permselectivity by the synergetic effects of Pd and *** doped Pd can exist in the BTESE network as nanoparticles while the doped Nb is incorporated into BTESE network forming Nb-O-Si covalent *** metal doping routes significantly influence the microstructure of PNB networks and gas separation performance of the PNB *** found that the PNB membrane with Pd doping priority(PNB-Pd)exhibited the highest surface area and pore volume,comparing with Nb doping priority(PNB-Nb)or Pd-Nb simultaneous doping(PNB-PdNb).The PNB-Pd membrane could not only exhibit an excellent H_(2) permeance of~10^(−6) mol·m^(−2)·s^(−1)·Pa^(−1) but also a high H_(2)/CO_(2) permselectivity of *** findings may provide novel insights into preparation of bimetallic doped organosilica membranes with excellent H_(2)/CO_(2) separation performance.