CO_2-[emim][Tf_2N]的汽液相平衡实验研究
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摘要
针对氨系、水系等传统吸收式制冷工质对存在腐蚀性强、制冷量小的缺点,自行设计搭建用于测量CO_2-[emim][Tf_2N]汽液相平衡的实验台,在温度范围263. 15～358. 15 K、压力范围0. 17～2. 45 MPa条件下,测定了CO_2在离子液体[emim][Tf_2N]中的相平衡数据。结果表明,CO_2在离子液体[emim][Tf_2N]中的溶解度可达到0. 535,为CO_2-[emim][Tf_2N]在吸收式制冷系统中的应用奠定了基础数据。
In view of the shortcomings of the traditional absorption refrigerants such as ammonia,water,etc,it has the disadvantages of strong corrosion and low refrigerating capacity. An experimental platform has been designed and maded for measuring vapor-liquid equilibria of CO_2-[emim][Tf_2N]. The phase equilibrium data of CO_2 in ionic liquid[emim][Tf_2N]are measured at temperatures from 263. 15 K to358. 15 K and pressures from 0. 17 MPa to 2. 45 MPa. The results show that the solubility of CO_2 in[emim][Tf_2N]can reach up to 0. 535,which is the basis for the application of CO_2-[emim][Tf_2N] in absorption refrigeration system.
In view of the shortcomings of the traditional absorption refrigerants such as ammonia,water,etc,it has the disadvantages of strong corrosion and low refrigerating capacity. An experimental platform has been designed and maded for measuring vapor-liquid equilibria of CO_2-[emim][Tf_2N]. The phase equilibrium data of CO_2 in ionic liquid[emim][Tf_2N]are measured at temperatures from 263. 15 K to358. 15 K and pressures from 0. 17 MPa to 2. 45 MPa. The results show that the solubility of CO_2 in[emim][Tf_2N]can reach up to 0. 535,which is the basis for the application of CO_2-[emim][Tf_2N] in absorption refrigeration system.
引文
[1] Bian Y,He G,Cai D,et al. Research progress of absorption refrigeration working pairs[J]. Journal of Refrigeration,2015,36(6):17-26.
[2] Xie G,Wu Q,Fa X,et al. A novel lithium bromide absorption chiller with enhanced absorption pressure[J].Applied Thermal Engineering,2010,38(5):1-6.
[3] Li L. Research progress on alternative refrigerants and their development trend[J]. Jounal of Refrigeration,2011,32(6):53-58.
[4] Wu W,Wu J,Wang Z,et al. Selection of ionic liquids and absorption properties of ionic liquids-CO2working pairs[J]. Journal of Refrigeration,2016,37(3):22-28.
[5] Gepppert-Rybczynska M,Lehmann J K,Safarov J,et al.Thermodynamic surface properties of[Bmim][Tf2N]or[Emim][Tf2N] binary mixtures with tetrahydrofuran,acetonitrile or dimethylsulfxide[J]. Journal of Chemical Thermodynamics,2013,62(3):104-110.
[2] Xie G,Wu Q,Fa X,et al. A novel lithium bromide absorption chiller with enhanced absorption pressure[J].Applied Thermal Engineering,2010,38(5):1-6.
[3] Li L. Research progress on alternative refrigerants and their development trend[J]. Jounal of Refrigeration,2011,32(6):53-58.
[4] Wu W,Wu J,Wang Z,et al. Selection of ionic liquids and absorption properties of ionic liquids-CO2working pairs[J]. Journal of Refrigeration,2016,37(3):22-28.
[5] Gepppert-Rybczynska M,Lehmann J K,Safarov J,et al.Thermodynamic surface properties of[Bmim][Tf2N]or[Emim][Tf2N] binary mixtures with tetrahydrofuran,acetonitrile or dimethylsulfxide[J]. Journal of Chemical Thermodynamics,2013,62(3):104-110.