کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4907480 | 1426208 | 2017 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Molar enthalpy of mixing and refractive indices of choline chloride-based deep eutectic solvents with water
ترجمه فارسی عنوان
آنتالپی مولار شاخص های مخلوط کردن و انکساری از حلال های عمیق یوتکتیک عمیق کولین بر اساس آب
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
The molar enthalpies of mixing were measured for binary systems of choline chloride-based deep eutectic solvents (glycerol, ethylene glycol and malonic acid) with water at 298.15Â K and 308.15Â K, and atmospheric pressure with an isothermal calorimeter. Refractive indices were also measured at 303.15Â K and atmospheric pressure. The binary mixtures of {chcl/glycerol (1:2)Â +Â water, chcl/ethylene glycol (1:2)Â +Â water} showed exothermic behaviour over the entire range of composition, while the binary mixture of {chcl/malonic acid (1:1)Â +Â water} showed endothermic behaviour at first and then changed to be exothermic with the increasing content of chcl/malonic acid (1:1). Experimental refractive indices were fitted with the Redlich-Kister equation, and experimental molar enthalpies of mixing were correlated with the Redlich-Kister equation and the non-random two-liquid (NRTL) model. The NRTL model with the fitted parameters was used to predict the vapour pressures of these three mixtures. For mixtures of {chcl/glycerol (1:2)Â +Â water} and {chcl/ethylene glycol (1:2)Â +Â water}, the predicted vapour pressures agreed well with the experimental results from the literature. While for mixture of {chcl/malonic acid (1:1)Â +Â water}, the predicted vapour pressures showed deviation at the high concentration of chcl/malonic acid (1:1), and this was probably because of the complex molecular interaction between chcl/malonic acid (1:1) and water.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Journal of Chemical Thermodynamics - Volume 105, February 2017, Pages 30-36
Journal: The Journal of Chemical Thermodynamics - Volume 105, February 2017, Pages 30-36
نویسندگان
Chunyan Ma, Yanhua Guo, Dongxue Li, Jianpeng Zong, Xiaoyan Ji, Chang Liu,