کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
155602 456905 2012 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Phase inversion in agitated liquid–liquid dispersions: Anomalous effect of electrolyte
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Phase inversion in agitated liquid–liquid dispersions: Anomalous effect of electrolyte
چکیده انگلیسی

An imbalance between breakup and coalescence of drops in turbulent liquid–liquid dispersions leads to inversion of phases—the dispersed phase becomes continuous and vice versa. An increase in the rate of coalescence of drops is expected to decrease the dispersed phase fraction at which inversion occurs. In the present work, we increased the rate of coalescence of drops by adding electrolyte to pure liquid–liquid dispersions. The experiments carried out for three representative liquid–liquid systems show that contrary to the expectation the addition of an electrolyte increases the dispersed phase fraction at which inversion occurs for both, oil-in-water and water-in-oil dispersions. The step-down experiments confirm that the addition of the electrolyte increases the rate of coalescence of drops in lean dispersions under the same conditions, thereby confirming an anomalous effect of the presence of an electrolyte on the stability of dispersions.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Science - Volume 78, 20 August 2012, Pages 33–37
نویسندگان
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