Interfacial area in gas-liquid Couette-Taylor flow reactor
Interfacial area in gas-liquid Couette-Taylor flow reactor
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DOI：
10.1016/j.expthermflusci.2003.06.003
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发表时间：
2004-04-01
影响因子：
3.2
通讯作者：
Ryszczuk, T
中科院分区：
文献类型：
--
作者：
Dluska, E;Wronski, S;Ryszczuk, T
在这项研究中，在一个搅拌槽和Couette-Taylor-Poietille流（CTPF）反应器内产生的比界面面积（气-液）的范围内的旋转速度，气体和液体的体积流量进行了测定。实验测定了连二亚硫酸钠在碱性溶液中的氧化比表面积。在操作转速（0-3000 rpm）、液体流速（1 dm（3）min（-1））和气/液体积流速（0.5-2.0）的范围内，CTPF的比界面面积在700-1200 m（2）m（-3）范围内。通常，CTPF反应器获得的比界面面积比搅拌釜反应器获得的比界面面积高一个数量级（在本研究中）。还发现，从测量的a（L）和使用先前获得的k（L）a值计算的液相传质系数为10（-4）m·s（-1）的数量级，这与本研究中计算的2.5 mm直径的气泡一致。(C)2003年爱思唯尔公司All rights reserved.
In this study the specific interfacial area (gas-liquid) generated within a stirred tank and Couette-Taylor-Poiseuille flow (CTPF) reactor was determined for a range rotational speeds, and gas and liquid volumetric flow rates. The specific interfacial area was obtained experimentally using the oxidation sodium dithionite in alkaline solution. The specific interfacial area for a CTPF was found to be in range 700-1200 m(2) m(-3) over the range of operating rotational speed (0-3000 rpm), liquid flow rate (1 dm(3) min(-1)) and gas/liquid volumetric flow rates (0.5-2.0). Typically, the specific interfacial area obtained for the CTPF reactor was an order of magnitude higher than those obtained (in this study) for a stirred tank reactor. It was also found that the liquid phase mass transfer coefficient, calculated from the measured a(L) and using previously obtained k(L)a values, was of the order 10(-4) m s(-1), which was consistent for 2.5 mm diameter bubbles as calculated in this study. (C) 2003 Elsevier Inc. All rights reserved.