suggestion of new correlations for drop/interface coalescence phenomena in the absence and presence of single surfactant

نویسندگان

parissa khadiv parsi

mohammad ali moosavian

چکیده

after designing and constructing a coalescence cell, drop/interface coalescence phenomenon was studied in the absence and presence of single surfactant.two surface active agents of sodium dodecyl sulfate and 1-decanol were used. distilled water was used as dispersed phase. toluene, n-heptane and aqueous 60% (v/v) of glycerol were selected as continuous phases, separately. it was found that the coalescence time increased with both drop size and falling height. when the chemical system suffered from multi-step (partial) coalescence, number of coalescence steps decreased with either of these variables. addition of a single ionic or nonionic surfactant made the drop size smaller, and hence caused the onset of partial coalescence. when the surfactant was soluble in the drop phase, it increased the time more effectively. also, it was found that the viscosity of the continuous phase played an important role in drop-interface coalescence. based on the experimental results, new correlations were proposed. then, the results were compared with the other models by application of the existing condition.

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Suggestion of New Correlations for Drop/Interface Coalescence Phenomena in the Absence and Presence of Single Surfactant

After designing and constructing a coalescence cell, drop/interface coalescence phenomenon was studied in the absence and presence of single surfactant.Two surface active agents of sodium dodecyl sulfate and 1-decanol were used. Distilled water was used as dispersed phase. Toluene, n-heptane and aqueous 60% (v/v) of glycerol were selected as continuous phases, separately. It was found that ...

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عنوان ژورنال:
iranian journal of chemistry and chemical engineering (ijcce)

ناشر: iranian institute of research and development in chemical industries (irdci)-acecr

ISSN 1021-9986

دوره 23

شماره 1 2004

میزبانی شده توسط پلتفرم ابری doprax.com

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