文献类型：期刊文献

英文题名：Hydrodynamic Modeling on the External Liquid-Solid Wetting Efficiency in a Trickling Flow Reactor

作者：Cheng, Zhen-Min[1];Kong, Xiang-Ming[1];Zhu, Jun[1];Wang, Zhen-Yuan[1];Jin, Jian[1];Huang, Zi-Bin[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2013

卷号：59

期号：1

起止页码：283

外文期刊名：AICHE JOURNAL

收录：;EI(收录号：20130115862645);WOS:【SCI-EXPANDED(收录号:WOS:000317462700028)】；

基金：The authors are grateful to the financial supports of Natural Science Foundation of China (20876043 and 21076072) and Fundamental Research Funds for the Central Universities of China.

语种：英文

外文关键词：trickle-bed reactor; liquid flow texture; three-region model; liquid-solid wetting efficiency correlation

摘要：A three-region model was proposed, which considers the bed cross section being composed of a stagnant liquid region, a liquid film region, and a rivulet flow region. To estimate the fractions of the three regions, the fraction of film flow was evaluated first, by transforming the complex trickling flow texture into pure liquid film flow. Through the measurements of liquid holdup and pressure drop for the film flow, a relationship between relative permeability and gas saturation was established, and from which the fraction of film flow region was obtained. It shows packing size is most important to the faction of rivulet flow. The external wetting efficiency of the packing was correlated as the sum of two-third power of the liquid film fraction and the rivulet flow fraction, besides, a correlation based on Reynolds and Galileo numbers of the two phases in the form of eta(ce) = 4.85Re(L)(0:42) Ga-L(-0.25) Re-G(0.083) was proposed. (C) 2012 American Institute of Chemical Engineers AIChE J, 59: 283-294, 2013