费托蜡在五种有机溶剂中的溶解度测定及关联  

Determination and correlation of the solubility of Fischer-Tropsch wax in five different organic solvents

作　　者：谢浩东 徐可凡 于亚楠 张胜振 张翠清 蒋晨光 张帆[3] 陈胜利[1] XIE Hao-dong;XU Ke-fan;YU Ya-nan;ZHANG Sheng-zhen;ZHANG Cui-qing;JIANG Chen-guang;ZHANG Fan;CHEN Sheng-li(College of Chemical Engineering and Environment,China University of Petroleum,Beijing 102249,China;National Institute of Clean-and-Low-Carbon Energy,Beijing 102211,China;College of Mechanical and Transportation Engineering,China University of Petroleum,Beijing 102249,China)

机构地区：[1]中国石油大学(北京)化学工程与环境学院,北京102249 [2]北京低碳清洁能源研究院,北京102211 [3]中国石油大学(北京)机械与储运工程学院,北京102249

出　　处：《高校化学工程学报》2022年第1期28-35,共8页Journal of Chemical Engineering of Chinese Universities

基　　金：国家能源投资集团科技创新项目(ST930019SH10)。

摘　　要：研究采用动态法测定常压下费托蜡在正丁醇、乙酸丁酯、正辛烷、石油醚和甲苯溶剂体系中的溶解度。结果表明,费托蜡在5种有机溶剂中的溶解度均随温度升高而增大,且在不同溶剂中费托蜡的溶解度存在较大差异。采用Apelblat方程、多项式方程以及简化的二参数方程关联溶解度数据,关联结果良好,但Apelblat方程、多项式方程的拟合效果优于简化的二参数方程。此外,通过修正的Van’t Hoff方程计算,得到费托蜡在5种有机溶剂中的溶解焓Δ_(sol)H、溶解熵Δ_(sol)S和溶解吉布斯自由能Δ_(sol)G,结果表明费托蜡在5种有机溶剂中的溶解过程均为吸热、熵增的非自发过程。所得结果能够为费托蜡结晶工艺的开发提供重要的理论依据。Solubilities of Fischer-Tropsch wax in organic solvents(n-butanol,butyl acetate,n-octane,petroleum ether and toluene)under atmospheric pressure were measured by a dynamic method.The results show that the solubilities of Fischer-Tropsch wax in the five organic solvents increase with temperature,and are of great difference in different solvents.The solubility data were well correlated by Apelblat equation,polynomial equation and simplified two-parameter equation,and better correlated by Apelblat equation and polynomial equation than by simplified two-parameter equation.In addition,the values of the dissolution enthalpyΔ_(sol)H,dissolution entropyΔ_(sol)S and dissolution Gibbs free energyΔ_(sol)G of Fischer-Tropsch wax in the five organic solvents were calculated by modified Van’t Hoff equation.The obtained values of these thermodynamic parameters show that the dissolution processes of Fischer-Tropsch wax in the five organic solvents are endothermic,entropic and non-spontaneous.The results obtained can provide an important theoretical basis for the development of Fischer-Tropsch wax crystallization processes.

关 键 词：费托蜡 固液平衡 溶解度 溶解热力学性质 

分 类 号：TQ645.93[化学工程—精细化工]