کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
620539 1455173 2015 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The effect of surfactant addition on the performance of a bubble column containing a non-Newtonian liquid
ترجمه فارسی عنوان
اثر افزودن سورفکتانت بر عملکرد یک ستون حباب حاوی مایع غیر نیوتنی است
کلمات کلیدی
ستون حباب، اسپری متخلخل، غیر نیوتنی، سورفاکتانت، نگهدارنده گاز، اندازه حباب
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
چکیده انگلیسی


• We studied a bubble column with porous sparger containing non-Newtonian liquids.
• We investigated the effect of surfactant addition on bubble column hydrodynamics.
• We propose a correlation for calculating the Sauter mean diameter of bubbles.
• We formulate correlations for predicting regime transition point and gas holdup.

The purpose of this work is to investigate how the addition of an organic surface active agent affects the characteristics of a bubble column equipped with a porous sparger and containing a non-Newtonian liquid. Water and an aqueous glycerin solution, both containing a minute amount of xanthan gum, were the non-Newtonian shear thinning liquids, while the gas phase was atmospheric air for all cases. Small amounts of the non-ionic surface active agent Triton X-100 was added to modify the surface tension of the non-Newtonian solutions. The results show that the diameter of the bubbles decreases and the transition point from the homogeneous to the heterogeneous is shifted to higher gas flow rates, when the surfactant is added. Appropriate correlations are also proposed, which take into account the liquid phase properties, the gas phase flow rate, as well as the column and sparger characteristics and predict with reasonable accuracy the transition point from the homogenous to the heterogeneous regime, the Sauter mean diameter of the bubbles and the average gas holdup.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Research and Design - Volume 95, March 2015, Pages 93–104
نویسندگان
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