文献类型：期刊文献

英文题名：Synthesis of silicalite-1 zeolite membranes for vapor-permeation separation of dichlorobenzene Isomers

作者：He, Qiu-Ping[1,2];Zou, Yun[2];Wang, Peng-Fei[2,3];Dou, Xiao-ming[1]

机构：[1]East China Univ Sci & Technol, Sch Sci, Inst Photon & Biomed, Shanghai 200062, Peoples R China;[2]Shanghai Lvqiang New Mat Co Ltd, Shanghai 200062, Peoples R China;[3]Shanghai Res Inst Chem Ind Co Ltd, State Key Lab Polyolefin Catalyt Technol & High P, Shanghai 200062, Peoples R China

年份：2021

卷号：32

期号：47

外文期刊名：NANOTECHNOLOGY

收录：;EI(收录号：20213710897034);WOS:【SCI-EXPANDED(收录号:WOS:000692005300001)】；

基金：We wish to thank the Shanghai Science and Technology Talent Project (No. 15XD1522300) for financial support through a strategic grant.

语种：英文

外文关键词：dichlorobenzene isomers; silicalite-1 zeolite; vapor-permeation; separation; membrane

摘要：Silicalite-1 zeolitic membranes have been successfully fabricated on the porous alpha-Al2O3 support by templated and template-free protocol, respectively, for vapor permeation separation of dichlorobenzene (DCB) isomers. After proving the high quality of the membranes by single gas permeation (He and SF6) performance, the vapor-permeation of DCB isomers over two types of the silicalite-1 membrane was then investigated. The separation results clearly indicated that under the lower partial pressure and higher temperature, the effect of DCB isomer adsorption on the permeance could be kept at a sufficiently low level and sharp selectivity become more important. Thus, high p-DCB selectivity could be achieved. Comparatively, the template-free silicalite-1 zeolite has a much higher p-DCB selectivity due to the relatively fewer inter-crystalline gaps. Under certain separation conditions, the highest selectivity of p-DCB for p-/m-DCB and p-/o-DCB binary systems could reach 165 and 113, respectively.