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Kinetic Rate Constant of Liquid Drainage from colloidal gas aphrons

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Chinese Journal of Chemical Engineering 2009年第6期17卷 955-959页

作者：罗建洪李军黄平黄美英 Department of Chemical Engineering Sichuan University Chengdu 610065 China Chongqing Three Gorges University Chongqing 404000 China

A kinetic model fitted by the empirical equation has been proposed to describe the liquid drainage behavior. Rate constants （kd） of liquid drainage equation could be obtained from the above empirical equation. In this paper, the stability of the colloidal gas aphrons （Cgas）, the effect of concentrations of sodium dodecyl benzene sulphate （SDBS）, dodecyl trimethylammonium bromide （HTAB） and polyoxyethylene sorbitol anhydride monolaurate（Tween-20）, temperature, stirring speed, stirring time, and various kinds of salts on the kd of liquid drainage are further investigated. The results show that the Arrhenius equation can be successfully used to describe the relation between kd arid absolute temperature （T）, and concentrations of surfactants, stirring speed, stirring time and salinities also have great effect on the kd. At last, the Cgas drainage mechanism is explained from analysis of the rate of liquid drainage as a function of time.

关键词： colloidal gas aphrons liquid drainage stability rate constants

Insight into selection of appropriate formulation for colloidal gas aphron(CGA)-based drilling fluids

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Petroleum Science 2020年第3期17卷 759-767页

作者： Mohsen Pasdar Ezatallah Kazemzadeh Ehsan Kamari Mohammad Hossein Ghazanfari Mohammad Soleymani Department of Petroleum Engineering Research Institute of Petroleum IndustryTehranIran Department of Chemical and Petroleum Engineering Sharif University of TechnologyTehranIran

Application of light-weight drilling fluids is essential to develop depleted hydrocarbon ***,colloidal gas aphron(CGA)-based fluids have been introduced for such applications due to their ability in controlling fluid *** this work,a comprehensive experimental study was performed to choose the best formulation for CGA fluids by implementing static stability tests,rheological behavior measurements,and bubble size analyses of *** gum polymer and sodium dodecyl benzene sulfonate(SDBS),an anionic surfactant,and cetyl trimethyl ammonium bromide(CTAB),a cationic surfactant,were utilized to prepare *** the range of experiments conducted,the performance of CGA fluids prepared with SDBS was improved by increasing the polymer and surfactant ***,for CTAB,it was improved by an increase in the polymer concentration and a decrease in the surfactant *** formation of white,long hair-like precipitates observed at high levels of CTAB caused CGA fluid to become rapidly ***,it was observed that the size of Cgas was significantly influenced by the polymer and surfactant *** most stable bubbles were formed at 6.86 g/L of polymer *** results of this study provide insights into appropriate formulation for CGA-based fluids which could be potentially applicable in drilling operations.

关键词： colloidal gas aphrons Dispersion Stability Rheology Bubble size analysis

PREDISPERSED SOLVENT EXTRACTION──THE STATE-OF-THE-ART REVIEW

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化工学报 2000年第S1期51卷 299-302页

作者： Wang Yundong, Huang Yingyi and Dai Youyuan (State Key Laboratory of Chemical Engineering---Solvent Extraction Laboratory, Department of Chemica Engineering, Tsinghua University, Beijing 100084)

Predispersed solvent extraction (PDSE) is a new extraction technique in which one of the two phases (usually the oil phase) is predispersed into minute droplets. The essential part of this novel technique is the use of colloidal liquid aphrons (CLA) together with colloidal gas aphrons (CGA). The use of colloidal liquid aphrons in predispersed solvent extraction may ameliorate the problems such as emulsion formation, reduction of interfacial mass transfer etc. In this paper, PDSE process, CLA and CGA are systematically reviewed and the potential applications of CLA, CGA and PDSE for the various areas of separation as well as the latest development in this area are discussed.

关键词： Predispersed solvent extraction colloidal liquid aphrons colloidal gas aphrons

Predispersed Solvent Extraction

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Predispersed Solvent Extraction