Liquid phase mixing in trayed bubble column reactors

被引：32
作者：
Alvaré, J
Al-Dahhan, MH
机构：
[1] Air Prod & Chem Inc, Allentown, PA 18195 USA
[2] Washington Univ, CREL, St Louis, MO 63130 USA
来源：
CHEMICAL ENGINEERING SCIENCE | 2006年 / 61卷 / 06期
关键词：
bubble column; liquid backmixing; multiphase reactor; perforated trays; compartment models; axial dispersion model;
D O I：
10.1016/j.ces.2005.10.015
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
The compartmentalization of conventional bubble columns by perforated trays constitutes a very effective method to reduce the liquid backmixing. The effect of tray design and operating conditions on the overall liquid mixing was studied in a bench-scale trayed bubble column. The extent of liquid backmixing in the column was investigated in light of liquid-phase tracer response experiments. In average, a three fold reduction in the liquid backmixing was achieved in the trayed column as compared to the column without the trays. Moreover, the tray open area and the superficial liquid velocity were found to have the strongest effects on the liquid backmixing. The N-CSTR with Backmixing Model was found to match the experimental tracer response curves better than the Axial Dispersion Model. (c) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1819 / 1835
页数：17
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