Ultrafine tuning of the pore size in zeolite A for efficient propyne removal from propylene  

作　　者：Chaohui He Rajamani Krishna Yang Chen Jiangfeng Yang Jinping Li Libo Li 

机构地区：[1]College of Chemistry and Chemical Engineering,Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization,Taiyuan University of Technology,Taiyuan 030024,China [2]Van’t Hoff Institute for Molecular Sciences,University of Amsterdam,Science Park 904,1098 XH Amsterdam,the Netherlands [3]Key Laboratory of Coal Science and Technology,Taiyuan University of Technology,Taiyuan 030024,China

出　　处：《Chinese Journal of Chemical Engineering》2021年第9期217-221,共5页中国化学工程学报（英文版）

基　　金：financial support from the National Natural Science Foundation of China(21922810,21908153,21908155);program of Innovative Talents of Higher Education Institutions of Shanxi;the supported by Cultivate Scientific Research Excellence Programs of Higher Education Institutions in Shanxi(CSREP)。

摘　　要：The removal of trace propyne(C_(3)H_(4))from propyne/propylene(C_(3)H_(4)/C_(3)H_(6))mixtures is a technical and challenging task during the production of polymer-grade propylene in view of their very similar size and physical properties.While some progress has been made,it is still very challenging to use some highly stable and commercially available porous materials via an energy-efficient adsorptive separation process.Herein,we report the ultrafine tuning of the pore apertures in type-A zeolites for the highly efficient removal of trace amounts of C_(3)H_(4)from C_(3)H_(4)/C_(3)H_(6)mixtures.The resulting ion-exchanged zeolite 5 A exhibits a large C_(3)H_(4)adsorption capacity(2.3 mmol g^(-1)under 10^(-4)MPa)and high C_(3)H_(4)/C_(3)H_(6)selectivity at room temperature,which were mainly attributed to the ultrafine-tuned pore size that selectively blocks C_(3)H_(6)molecules,while maintaining the stro ng adsorption of C_(3)H_(4)at low pressure region.High purity of C_(3)H_(6)(>99.9999%)can be directly obtained on this material under ambient conditions,as demonstrated by the experimental breakthrough curves obtained for both 1/99 and 0.1/99.9(V V)C_(3)H_(4)/C_(3)H_(6) mixtures.

关 键 词：Type-A zeolite Ion-exchange Pore tuning Propyne/propylene separation Breakthrough experiments 

分 类 号：TQ221.212[化学工程—有机化工]