Adsorption properties of environmentally friendly insulating medium C_(4)F_(7)N and its common decomposition products in NaA,NaZSM-5,and NaX molecular sieves  

作　　者：Shuangshuang Tian Zian Yuan Xiaoxing Zhang Yingxiang Wang Weifeng Luo Yang Liu 

机构地区：[1]Hubei Engineering Research Center for Safety Monitoring of New Energy and Power Grid Equipment,Hubei University of Technology,Wuhan,China [2]Xiangyang Industrial Institute of Hubei University of Technology,Wuhan,China [3]State Grid HBEPC.Ltd Economic and Technology Research Institute,Wuhan,Hubei,China [4]State Grid Hubei Extra High Voltage Company,Wuhan,China

出　　处：《High Voltage》2023年第3期611-621,共11页高电压（英文）

基　　金：The National Natural Science Foundation of China,Grant/Award Number:52107145;The Natural Science Foundation of Hubei Province,Grant/Award Number:2021CFA025。

摘　　要：Selecting suitable materials to adsorb the C_(4)F_(7)N mixtures decomposition products could not only keep the stable operation of the environmentally friendly insulating gas switch cabinet,but also ensure the safety of operation and maintenance personnel.It is necessary to study the interaction of three types of molecular sieves with the C_(4)F_(7)N mixture and its decomposition products,which could provide a theoretical basis for the selection of adsorbents in the C_(4)F_(7)N gas switch cabinet.In this research,the molecular dynamics simulation was used to study the C_(4)F_(7)N-CO_(2)mixture and its ten kinds of decomposition products CO,CF_(4),C_(2)F_(6),C_(3)F_(6),C_(3)F_(8),CF_(3)H,CF_(3)CN,C_(2)F_(5)CN,C_(2)N_(2),and COF_(2)in three molecular sieves adsorption process(NaA,NaZSM-5,and NaX).The gas concentration distribution curve and interaction energy parameters were obtained by simulation.The interaction energies of C_(3)F_(8)in NaA,C_(4)F_(7)N in NaZSM-5,and C_(3)F_(6)in NaX molecular sieve are the largest,which are−368.35 kJ/mol,−174.93 kJ/mol,and−340.09 kJ/mol respectively.Then,the theoretical results were verified by the fluorocarbon gases adsorption experiment.The adsorption performance of three molecular sieves for all gases was obtained by combining the experimental results and dynamics parameters.The adsorption rate of the NaA molecular sieve for fluorocarbon gas is less than 35%,and its adsorption performance for all gases is weak.NaZSM-5 and NaX molecular sieves show excellent adsorption performance for C_(3)F_(6)and C_(3)F_(8),and the adsorption rates are over 70%.NaZSM-5 molecular sieve shows good adsorption capacity for CF_(3)CN,C_(2)F_(6),C_(2)N_(2),C_(3)F_(6),C_(3)F_(8),C_(4)F_(7)N,and C_(2)F_(5)CN.NaX molecular sieve shows good adsorption capacity for C_(3)F_(6),C_(3)F_(8),C_(4)F_(7)N,and C_(2)F_(5)CN.Both of them have the potential to be used as adsorbents in environmental protection insulated gas switch cabinet.

关 键 词：SIEVE ADSORPTION GASES 

分 类 号：O64[理学—物理化学]