The development of metal-organic frameworks(MOFs)with highly efficient adsorption and separation of acet-ylene is very important and challenging in chemical industry due to the explosive nature of acetylene.Porous MOF...The development of metal-organic frameworks(MOFs)with highly efficient adsorption and separation of acet-ylene is very important and challenging in chemical industry due to the explosive nature of acetylene.Porous MOFs can be constructed by inserting a second auxiliary ligand,which allows the use of large ligands to construct non-interpenetrated structures and increase pore utilization.Herein,SNNU-205 is successfully synthesized,which connects two sets of interpenetrated structures to form a double walled cage-within-cage structure by using the introduction of a second auxiliary ligand.The modified pore environment enables SNNU-205 to efficiently selectively adsorb C_(2)H_(2)over CO_(2).At 298 K and 1 atm,SNNU-205 can uptake much more C_(2)H_(2)(76.3 cm^(3)g1)than CO_(2)(47.3 cm^(3)g^(-1)),resulting in a high substance ratio of C_(2)H_(2)-to-CO_(2)(1.6).More importantly,the ideal adsorbed solution theory selectivity calculations and column breakthrough tests further indicate SNNU-205 to be promising adsorbents for C_(2)H_(2)adsorption and purification.展开更多
基金supported by the National Natural Science Foundation of China(22071140 and 21901151)the Natural Science Foundation of Shaanxi Province(2021JLM-20 and 2023-JC-QN-0522)+1 种基金China Postdoctoral Science Foundation(2022TQ0200 and 2022M722016)the Fundamental Research Funds for the Central Universities(GK202101002)。
基金supported by the National Natural Science Foundation of China(22101244)the Natural Science Foundation of Shandong Province(ZR2021QB044).
文摘The development of metal-organic frameworks(MOFs)with highly efficient adsorption and separation of acet-ylene is very important and challenging in chemical industry due to the explosive nature of acetylene.Porous MOFs can be constructed by inserting a second auxiliary ligand,which allows the use of large ligands to construct non-interpenetrated structures and increase pore utilization.Herein,SNNU-205 is successfully synthesized,which connects two sets of interpenetrated structures to form a double walled cage-within-cage structure by using the introduction of a second auxiliary ligand.The modified pore environment enables SNNU-205 to efficiently selectively adsorb C_(2)H_(2)over CO_(2).At 298 K and 1 atm,SNNU-205 can uptake much more C_(2)H_(2)(76.3 cm^(3)g1)than CO_(2)(47.3 cm^(3)g^(-1)),resulting in a high substance ratio of C_(2)H_(2)-to-CO_(2)(1.6).More importantly,the ideal adsorbed solution theory selectivity calculations and column breakthrough tests further indicate SNNU-205 to be promising adsorbents for C_(2)H_(2)adsorption and purification.
