Direct separation of high purity ethylene(C2H4)from an ethane(C2H6)/ethylene mixture is a critical and challenging task owing to the very similar molecular size and physical properties of the two components.While some studies have attempted this separation,there is a lack of excellent porous materials with strong binding affinity for C2H6-selective adsorption via an energy-efficient adsorptive separation pro-cess.Herein,we report a titanium metal-organic framework with strong binding affinity and excellent stability for the highly efficient removal of C2H6 from C2H6/C2H4 mixtures.Single component adsorption isotherms demonstrated a larger amount of adsorbed ethane(1.16 mmol·g-1 under 1 kPa)and high C2H6/C2H4 selectivity(2.7)for equimolar C2H6/C2H4 mixtures,especially in the low-pressure range,which is further confirmed by the results of grand canonical Monte Carlo simulations for C2H6 adsorption in this framework.The experimental breakthrough curves showed that C2H4 with a high purity was collected directly from both 1∶9 and 1∶15 C2H6/C2H4(volume ratio)mixtures at 298 K and 100 kPa.Moreover,the unchanged adsorption and separation performance after cycling experiments confirmed the promis-ing applicability of this material in future.

College of Chemistry and Chemical Engineering,Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization,Taiyuan University of Technology,Taiyuan 030024,China;Key Laboratory of Coal Science and Technology,Taiyuan University of Technology,Taiyuan 030024,China

[1]Puxu Liu;Yong Wang;Yang Chen;Xiaoqing Wang;Jiangfeng Yang;Libo Li;Jinping Li-.Stable titanium metal-organic framework with strong binding affinity for ethane removal)[J].中国化学工程学报（英文版）,2022(02):35-41

Stable,titanium,metal,organic,framework,strong,binding,affinity,ethane,removal,Direct,separation,purity,ethylene,C2H4,from,C2H6,critical,challenging,task,owing,very,similar,molecular,size,physical,properties,two,components,While,some,studies,have,attempted,this,there,lack,excellent,porous,materials,selective,adsorption,via,energy,efficient,adsorptive,cess,Herein,report,stability,highly,mixtures,Single,isotherms,demonstrated,larger,amount,adsorbed,under,kPa,selectivity,equimolar,especially,low,pressure,range,which,further,confirmed,by,results,grand,canonical,Monte,Carlo,simulations,experimental,breakthrough,curves,showed,that,was,collected,directly,both,volume,Moreover,unchanged,performance,after,cycling,experiments,promis,applicability,future

0.549955