کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10397322 | 889435 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Contribution to the study of hydrodynamics and gas-liquid mass transfer in a two- and three-phase split-rectangular airlift reactor
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تکنولوژی و شیمی فرآیندی
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چکیده انگلیسی
Hydrodynamics and gas-liquid mass transfer in a rectangular airlift loop reactor with an internal baffle has been studied in this work. Measurements were carried out for two- and three-phase systems using air-water and air-water-polystyrene particles. The effects of the superficial gas velocity and solid loading up to 15% (v/v) were examined and correlations describing the hydrodynamics and gas-liquid mass transfer behaviours were proposed. The experimental results of mass transfer were compared with those of the literature. It was found in all cases that the gas hold-up in the riser and downcomer and volumetric mass transfer coefficient increased with increasing the superficial gas velocity, while the liquid velocity in the downcomer increased with Ugr until 0.033 m sâ1 and then decreased to reach a plateau value for Ugr > 0.04 m sâ1. It was also found that the liquid velocity and the volumetric mass transfer coefficient decreased only with the initial addition of solid for Ugr higher than 0.02 m sâ1 and that the gas hold-up in the downcomer was significantly influenced by the presence of solid for a concentration above 10% (v/v), while the gas hold-up was almost not affected in the riser. The aeration efficiency was also calculated and was found to be in the range 2.54-4.41 kg O2/kW h.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering and Processing: Process Intensification - Volume 44, Issue 10, October 2005, Pages 1047-1053
Journal: Chemical Engineering and Processing: Process Intensification - Volume 44, Issue 10, October 2005, Pages 1047-1053
نویسندگان
B. Gourich, N. EL Azher, M. Soulami Bellhaj, H. Delmas, A. Bouzidi, M. Ziyad,