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	Enhancement of oxygen gas-liquid mass transfer with colloidal gas aphron dispersions
	Dai, YJ; Deng, T; Wang, J; Xu, K
刊名	COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
	2004-06-15
卷号	240期号:1-3页码:165-171
关键词	gas-liquid mass transfer oxygen colloidal gas aphron surfactants stiring
ISSN号	0927-7757
其他题名	Colloid Surf. A-Physicochem. Eng. Asp.
中文摘要	In this work, an attempt was made to enhance gas-liquid mass transfer of oxygen with the aid of colloidal gas aphron (CGA) dispersion. The gas-liquid volume mass transfer coefficients (k(L)a) of oxygen in CGA dispersions were measured and related to stirring velocity, type and concentration of surfactants, and temperature. Four surfactants, sodium dodecyl sulfate (SDS), hexadecyltrimethyl ammonium chloride (HTAC), nonylphenol ethoxylate (NP-10), and potassium mono lauryl phosphate (MAPK), were examined in forming CGAs and thereby affecting the mass transfer of oxygen in the dispersions. It was found that effects of surfactants on the oxygen gas-liquid mass transfer were type-dependent. As concentrations rose, the k(L)a of oxygen increased evidently for SDS and an enhancement of k(L)a by a factor of three was observed at the concentration of 2.75 g/L. However the k(L)a decreased for MAPK. Nonylphenol ethoxylate was found to have little effect on k(L)a and HTAC showed mixed behavior. In SDS dispersion, it was found that the mass transfer reached a maximum value at a stirring velocity of 8000 r/min, but further benefit was not observed afterwards. With the increase of temperature, the mass transfer of oxygen was intensified but no much benefit was observed above 308 K. Published by Elsevier B.V.
英文摘要	In this work, an attempt was made to enhance gas-liquid mass transfer of oxygen with the aid of colloidal gas aphron (CGA) dispersion. The gas-liquid volume mass transfer coefficients (k(L)a) of oxygen in CGA dispersions were measured and related to stirring velocity, type and concentration of surfactants, and temperature. Four surfactants, sodium dodecyl sulfate (SDS), hexadecyltrimethyl ammonium chloride (HTAC), nonylphenol ethoxylate (NP-10), and potassium mono lauryl phosphate (MAPK), were examined in forming CGAs and thereby affecting the mass transfer of oxygen in the dispersions. It was found that effects of surfactants on the oxygen gas-liquid mass transfer were type-dependent. As concentrations rose, the k(L)a of oxygen increased evidently for SDS and an enhancement of k(L)a by a factor of three was observed at the concentration of 2.75 g/L. However the k(L)a decreased for MAPK. Nonylphenol ethoxylate was found to have little effect on k(L)a and HTAC showed mixed behavior. In SDS dispersion, it was found that the mass transfer reached a maximum value at a stirring velocity of 8000 r/min, but further benefit was not observed afterwards. With the increase of temperature, the mass transfer of oxygen was intensified but no much benefit was observed above 308 K. Published by Elsevier B.V.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Chemistry, Physical
研究领域[WOS]	Chemistry
收录类别	SCI
原文出处	://WOS:000222519100020
语种	英语
WOS记录号	WOS:000222519100020
公开日期	2013-11-05
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ipe.ac.cn/handle/122111/4928]
专题	过程工程研究所_研究所（批量导入）
作者单位	Chinese Acad Sci, Inst Proc Engn, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Dai, YJ,Deng, T,Wang, J,et al. Enhancement of oxygen gas-liquid mass transfer with colloidal gas aphron dispersions[J]. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,2004,240(1-3):165-171.
APA	Dai, YJ,Deng, T,Wang, J,&Xu, K.(2004).Enhancement of oxygen gas-liquid mass transfer with colloidal gas aphron dispersions.COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,240(1-3),165-171.
MLA	Dai, YJ,et al."Enhancement of oxygen gas-liquid mass transfer with colloidal gas aphron dispersions".COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 240.1-3(2004):165-171.

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