کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
158314 457004 2008 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Liquid–liquid two-phase flow patterns and mass transfer characteristics in rectangular glass microreactors
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Liquid–liquid two-phase flow patterns and mass transfer characteristics in rectangular glass microreactors
چکیده انگلیسی

The flow of two immiscible fluids was investigated in rectangular glass microchannels with equivalent diameters of 269 and 400μm. Deionised water, dyed toluene and hexane were selected as probe fluids. Flow patterns were obtained for Y- and T-junction of two micro-channels and monitored by a photo-camera. Volumetric velocities of water and organic phase varied between 1 and 6 ml/h. The formation mechanism of slug and parallel flow was studied and the mass transfer performances of two flow patterns were compared. The shape of the interface between the immiscible liquids was controlled by a competition between the viscous forces and the local interfacial tension. The flow patterns could be correlated with the mean Capillary and Reynolds numbers. The mass transfer coefficients for parallel and slug flow were determined using instantaneous neutralisation (acid–base) reaction. The two flow patterns showed the same global volumetric mass transfer coefficients in the range of 0.2–0.5s-1, being affected mainly by the base concentration in water for parallel flow and by the linear velocity in the case of the slug flow.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Science - Volume 63, Issue 16, August 2008, Pages 4035–4044
نویسندگان
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