Effect of size and polarity of solutes on partial molar volumes and intermolecular interaction in supercritical fluids

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	Effect of size and polarity of solutes on partial molar volumes and intermolecular interaction in supercritical fluids
	Zhang, XG; Gao, L; Liu, ZM; He, J; Zhang, JM; Han, BX
刊名	JOURNAL OF SUPERCRITICAL FLUIDS
	2002-08-01
卷号	23 期号:3 页码:233-241
关键词	Partial Molar Volumes Intermolecular Interactions Supercritical Fluids
ISSN号	0896-8446
英文摘要	The densities of supercritical (SC) n-pentane and n-pentane- methane, n -pentane-propane, n-pentane-n-heptane, n-pentane-n-decane, n-pentane-carbon dioxide, n-pentane-ethanol, and n-pentane-acetonitrile binary SC mixtures were measured at 476.6 K in the pressure range from 2 to 5 MPa, and n-pentane was SC solvent. The molalities of the solutes were 1.3 x 10(-4) mol g(-1). The partial molar volumes (PMVs) of the solutes were calculated on the basis of determined densities. It was observed that the PMVs of methane, propane, n-heptane and n-decane in SC n-pentane change from positive to negative as their size increases, but the peaks of the PMVs always corresponded to highest isothermal compressibility of the fluids. Ethanol, acetonitrile, carbon dioxide, and propane have different structure and polarity, but PMVs of the four solutes exhibit similar behavior, suggesting that the polarity and structure of the solutes are not dominant factors to influence the PMVs for the systems studied in this work under the experimental conditions. Monte Carlo simulation was carried out to study the microstructure of the fluids under some typical conditions where the density measurements were conducted. (C) 2002 Elsevier Science B.V. All rights reserved.
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000176604100005
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/78747]
专题	中国科学院化学研究所
通讯作者	Han, BX
作者单位	Chinese Acad Sci, Inst Chem, Ctr Mol Sci, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Zhang, XG,Gao, L,Liu, ZM,et al. Effect of size and polarity of solutes on partial molar volumes and intermolecular interaction in supercritical fluids[J]. JOURNAL OF SUPERCRITICAL FLUIDS,2002,23(3):233-241.
APA	Zhang, XG,Gao, L,Liu, ZM,He, J,Zhang, JM,&Han, BX.(2002).Effect of size and polarity of solutes on partial molar volumes and intermolecular interaction in supercritical fluids.JOURNAL OF SUPERCRITICAL FLUIDS,23(3),233-241.
MLA	Zhang, XG,et al."Effect of size and polarity of solutes on partial molar volumes and intermolecular interaction in supercritical fluids".JOURNAL OF SUPERCRITICAL FLUIDS 23.3(2002):233-241.