کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
158277 457002 2007 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The role of small bubbles in gas–liquid mass transfer in stirred vessels and assessment of a two-fraction model for noncoalescent or moderately viscous liquids
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
The role of small bubbles in gas–liquid mass transfer in stirred vessels and assessment of a two-fraction model for noncoalescent or moderately viscous liquids
چکیده انگلیسی

A two-gas-fraction model previously tested with gas-phase residence time distribution tests was used to interpret experimental transient curves during KLaKLa determinations made with a conventional dynamic method. Large bubbles are modelled by an axial dispersion model, whereas small bubbles are considered as perfectly mixed. The use of this two-gas-fraction model leads to a significant improvement in the fitting of the experimental curves. Furthermore, the analysis carried out suggested that what is actually observed during an experiment carried out with the dynamic method is the mass transfer of large bubbles only—even in the presence of a significant fraction of small bubbles.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Science - Volume 62, Issue 14, July 2007, Pages 3767–3776
نویسندگان
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