The kinetics and thermodynamics of surfactants in solvent sublation

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	The kinetics and thermodynamics of surfactants in solvent sublation
	Lu, YJ ; Wang, YS ; Xiong, Y ; Zhu, XH
刊名	FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY
	2001-08-01
卷号	370 期号:8 页码:1071-1076
关键词	trace-element separation transport extraction preconcentration
ISSN号	0937-0633
其他题名	Fresenius J. Anal. Chem.
中文摘要	Solvent sublation has been performed on very dilute solutions of one cationic surfactant, hexadecylpyridinium chloride (HPC), and one anionic surfactant. dodecylbenzenesulfonic acid (LBS). Some thermodynamic values were obtained, e.g. molecular areas, A, which are 50.0 and 47.7 Angstrom(2)/molecule, respectively, for HPC and LBS, and free adsorption energies, DeltaGdegrees(ads), which are -33.17 and -43.58 kJ mol(-1), respectively, for HPC and LBS. The kinetics were determined for a range of temperatures and gas flow-rates. Although the processes of solvent sublation of the two surfactants obey first-order kinetics, the respective adsorption mechanisms of HPC and LBS in the solvent sublation process were different. The pH and the presence of KCl and ethanol had no effect on the solvent sublation of LBS. The apparent active energy was calculated as 8.11 kJ mol(-1).
英文摘要	Solvent sublation has been performed on very dilute solutions of one cationic surfactant, hexadecylpyridinium chloride (HPC), and one anionic surfactant. dodecylbenzenesulfonic acid (LBS). Some thermodynamic values were obtained, e.g. molecular areas, A, which are 50.0 and 47.7 Angstrom(2)/molecule, respectively, for HPC and LBS, and free adsorption energies, DeltaGdegrees(ads), which are -33.17 and -43.58 kJ mol(-1), respectively, for HPC and LBS. The kinetics were determined for a range of temperatures and gas flow-rates. Although the processes of solvent sublation of the two surfactants obey first-order kinetics, the respective adsorption mechanisms of HPC and LBS in the solvent sublation process were different. The pH and the presence of KCl and ethanol had no effect on the solvent sublation of LBS. The apparent active energy was calculated as 8.11 kJ mol(-1).
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Chemistry, Analytical
研究领域[WOS]	Chemistry
关键词[WOS]	TRACE-ELEMENT SEPARATION ; TRANSPORT EXTRACTION ; PRECONCENTRATION
收录类别	SCI
原文出处	://WOS:000175276300016
语种	英语
WOS记录号	WOS:000175276300016
公开日期	2013-11-14
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ipe.ac.cn/handle/122111/5757]
专题	过程工程研究所_研究所（批量导入）
作者单位	1.Shengzhen Univ, Normal Sch, Dept Biol & Chem, Shengzhen 518060, Peoples R China 2.Zhongshan Univ, Sch Chem & Chem Engn, Guangzhou 510275, Peoples R China 3.Chinese Acad Sci, Inst Chem Met, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Lu, YJ,Wang, YS,Xiong, Y,et al. The kinetics and thermodynamics of surfactants in solvent sublation[J]. FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY,2001,370(8):1071-1076.
APA	Lu, YJ,Wang, YS,Xiong, Y,&Zhu, XH.(2001).The kinetics and thermodynamics of surfactants in solvent sublation.FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY,370(8),1071-1076.
MLA	Lu, YJ,et al."The kinetics and thermodynamics of surfactants in solvent sublation".FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY 370.8(2001):1071-1076.