文献类型：期刊文献

英文题名：New insights into transient behaviors of local liquid-holdup in periodically operated trickle-bed reactors using electrical capacitance tomography (ECT)

作者：Liu, Guozhu[1];Lan, Jiang-an[2];Cao, Yanbin[1];Huang, Zibin[2];Cheng, Zhenmin[2];Mi, Zhentao[1]

机构：[1]Tianjin Univ, Sch Chem Engn & Technol, Key Lab Green Chem Technol, Minist Educ MOE, Tianjin 300072, Peoples R China;[2]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2009

卷号：64

期号：14

起止页码：3329

外文期刊名：CHEMICAL ENGINEERING SCIENCE

收录：;EI(收录号：20092412122004);WOS:【SCI-EXPANDED(收录号:WOS:000271298400013)】；

基金：Financial supports from the Open Project Program of the State Key Laboratory of Chemical Engineering, East China University of Science and Technology (Grant no. HF06006) and partial support by the Program of Introducing Talents of Discipline to Universities (no: B06006) are gratefully acknowledged.

语种：英文

外文关键词：Trickle-bed reactor; Electrical capacitance tomography; Periodic operation; Liquid holdup; Liquid distribution; Maldistribution; Transient response; Imaging

摘要：Transient behavior of local liquid-holdup of air-kerosene fluids in periodically operated trickle-bed reactor (TBR) is investigated in an acrylic column (140mm ID and a height of 980mm) packed with 3.6mm glass spheres using a nonintrusive technique of electrical capacitance tomography (ECT). Local liquid-holdups determined from ECT images of normalized permittivity are experimentally calibrated under the steady-state operation with that from the classic drainage method. The instantaneous ECT images are captured at several axial positions along the column for the periodically operated TBR with slow-mode. The effect of periodic operation parameters (split, period, and time-average flow rate) on the instantaneous profiles of local liquid-holdup is firstly examined compared with the previous results. Transient variations of radial distributions of liquid and their maldistribution factor are calculated and further analyzed to provide more liquid distribution information under periodic operations. (C) 2009 Elsevier Ltd. All rights reserved.