Application of a 4-point optical probe to a Slurry Bubble Column Reactor
Application of a 4-point optical probe to a Slurry Bubble Column Reactor
复制标题
DOI：
10.1016/j.ces.2015.03.027
复制
发表时间：
2015-07
影响因子：
4.7
通讯作者：
Onkar N. Manjrekar;M. Duduković
中科院分区：
文献类型：
--
作者：
Onkar N. Manjrekar;M. Duduković
在本工作中，4点光学探针（Xue，J.，Al-Dahhan，M.，杜杜科维奇，议员，Mudde，R.F.，2008年a。AIChE J. 54，350-363）应用于浆态鼓泡塔以评估固体对气泡动力学的影响。所有实验均在8 in.直径的塔在搅拌湍流状态下操作。空气和水分别用作气体和液体介质，并且浆料由10% [重量]平均直径为60 μm的氧化铝催化剂颗粒或0.3 mm-0.35 mm尺寸范围内的玻璃球组成。在两种固体存在下，局部气含率和气泡频率降低。然而，与没有固体的系统相比，在氧化铝催化剂颗粒的存在下气泡速度增加，并且在玻璃球的存在下气泡速度略微降低。体积传质系数较低的氧化铝催化剂颗粒的存在下，并观察到在气-液界面面积略有减少。
In the present work, a 4-point optical probe(Xue, J., Al-Dahhan, M., Dudukovic, M.P., Mudde, R.F., 2008a. AIChE J. 54, 350–363) was applied to a slurry bubble column to assess the effect of solids on bubble dynamics. All experiments were performed in an 8 in. diameter column operated in the churn turbulent regime. Air and water were used as gas and liquid mediums respectively, and the slurry consisted of either 10% [by weight] aluminum oxide catalyst particles with 60 µm average diameter or glass spheres in the 0.3 mm–0.35 mm size range. Local gas hold-up and bubble frequency were reduced in the presence of both solids. However, bubble velocity increased in the presence of aluminum oxide catalyst particles, and is slightly reduced in presence of glass spheres, compared to a system with no solids. The volumetric mass transfer coefficient was lower in the presence of aluminum oxide catalyst particles, and a slight reduction in the gas–liquid interfacial area was observed.