化学工程2018，Vol.46Issue(4)：46-50,5.DOI:10.3969/j.issn.1005-9954.2018.04.009
EOS+γ法预测CO2-[emim][Tf2N]超额吉布斯自由能及超额焓
EOS+γ method prediction CO2-[emim] [Tf2N] excess Gibbs free energy and enthalpy
摘要
Abstract
For the lack of data in thermodynamic properties of CO2-ILs refrigeration absorption system,the Soave (SRK) equation,Wong-Sandler (WS) mixed rule and the model of the universal chemical activity coefficient (UNIQUAC) were used to associate the phase equilibrium data of the CO2-[emim] [Tf2N] system,the excess Gibbs free energy (GE) and excess enthalpy (HE) of the CO2-[emim] [Tf2N] absorption refrigeration system were obtained.The results show that the GE and HE of CO2-[emim] [Tf2N] refrigeration system are affected by temperature,pressure and the molar fraction of CO2.The GE is-878.774--260.195 J/mol,the HE is-296.532--26.494 5 J/mol.For the negative value of GE and HE,the mixing process is exothermic,in line with the thermodynamic change rule.Hence,the CO2-[emim] [Tf2N] absorption refrigeration system has the basic characteristics of becoming new working pair for the absorption refrigeration cycle,providing a basis for CO2-[emim] [Tf2N] used as absorption refrigeration system.关键词
CO2-[emim][Tf2N]/EOS+γ法/超额吉布斯自由能/超额焓Key words
CO2-[emim] [Tf2N]/EOS + y method/Gibbs free energy/excess enthalpy分类
通用工业技术引用本文复制引用
何丽娟,黄艳伟,李虹琰,潘鹏..EOS+γ法预测CO2-[emim][Tf2N]超额吉布斯自由能及超额焓[J].化学工程,2018,46(4):46-50,5.基金项目
国家自然科学基金资助项目(51566014,51106068) （51566014,51106068）
内蒙古自然科学基金资助项目(2015MS0547) （2015MS0547）
