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Enhancement of oxygen gas-liquid mass transfer with colloidal gas aphron dispersions
Alternative TitleColloid Surf. A-Physicochem. Eng. Asp.
Dai, YJ; Deng, T; Wang, J; Xu, K
2004-06-15
Source PublicationCOLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
ISSN0927-7757
Volume240Issue:1-3Pages:165-171
AbstractIn 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.; 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.
KeywordGas-liquid Mass Transfer Oxygen Colloidal Gas Aphron Surfactants Stiring
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1016/j.colsurfa.2004.03.018
URL查看原文
Indexed BySCI
Language英语
WOS Research AreaChemistry
WOS SubjectChemistry, Physical
WOS IDWOS:000222519100020
Citation statistics
Cited Times:15[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/4928
Collection研究所(批量导入)
AffiliationChinese Acad Sci, Inst Proc Engn, Beijing 100080, Peoples R China
Recommended Citation
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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