Boosting kinetic separation of ethylene and ethane on microporous materials via crystal size control  

作　　者：Yixuan Ma Cong Yu Lifeng Yang Rimin You Yawen Bo Qihan Gong Huabin Xing Xili Cui 

机构地区：[1]Key Laboratory of Biomass Chemical Engineering of Ministry of Education,College of Chemical and Biological Engineering,Zhejiang University,Hangzhou 310012,China [2]Fundamental Science&Advanced Technology Lab,PetroChina Petrochemical Research Institute,China National Petroleum Corporation,Beijing 102200,China [3]ZJU-Hangzhou Global Scientific and Technological Innovation Center,Zhejiang University,Hangzhou 311200,China [4]Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering,Hangzhou 310027,China

出　　处：《Chinese Journal of Chemical Engineering》2024年第1期85-91,共7页中国化学工程学报（英文版）

基　　金：supported by the National Key Research and Development Program of China(2022YFB3806800);the National Natural Science Foundation of China(22122811,22008209);the Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering(2021SZ-TD008).

摘　　要：The adsorptive separation of C_(2)H_(4)and C_(2)H_(6),as an alternative to distillation units consuming high energy,is a promising yet challenging research.The great similarity in the molecular size of C_(2)H_(4)and C_(2)H_(6)brings challenges to the regulation of adsorbents to realize efficient dynamic separation.Herein,we reported the enhancement of the kinetic separation of C_(2)H_(4)/C_(2)H_(6)by controlling the crystal size of ZnAtzPO_(4)(Atz=3-amino-1,2,4-triazole)to amplify the diffusion difference of C_(2)H_(4)and C_(2)H_(6).Through adjusting the synthesis temperature,reactant concentration,and ligands/metal ions molar ratio,ZnAtzPO4 crystals with different sizes were obtained.Both single-component kinetic adsorption tests and binary-component dynamic breakthrough experiments confirmed the enhancement of the dynamic separation of C_(2)H_(4)/C_(2)H_(6)with the increase in the crystal size of ZnAtzPO_(4).The separation selectivity of C_(2)H_(4)/C_(2)H_(6)increased from 1.3 to 98.5 with the increase in the crystal size of ZnAtzPO_(4).This work demonstrated the role of morphology and size control of adsorbent crystals in the improvement of the C_(2)H_(4)/C_(2)H_(6)kinetic separation performance.

关 键 词：ADSORPTION ADSORBENT ETHYLENE Binary mixture Crystal size control Kinetic separation 

分 类 号：TQ221.211[化学工程—有机化工] O647.3[理学—物理化学]