Hydrodynamics and mechanism of hydrophobic foam column tray

Contact angle hysteresis effect

Journal article (2020)

Authors

P. Yan Intensified Reaction and Separation Systems - Mechanical, Maritime and Materials Engineering , Tianjin University
Xingang Li National Engineering Research Center of Distillation Technology, Tianjin University
Hong Li National Engineering Research Center of Distillation Technology, Tianjin University
Yuanyuan Shao Tianjin University
Hui Zhang Tianjin University, University of Western Ontario
Xin Gao National Engineering Research Center of Distillation Technology, Tianjin University
Research Group
Intensified Reaction and Separation Systems (Mechanical, Maritime and Materials Engineering) (TU Delft)
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Published Date

2020

Language

English

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Faculty

Mechanical, Maritime and Materials Engineering

Department

Process and Energy

Research Group

Intensified Reaction and Separation Systems

Abstract

Interfacial wettability adjustment is a new method for intensifying vapor–liquid mass transfer process. Contact angle effect has been well investigated but not complete due to interfacial wettability consisting of both static behavior (contact angle) and dynamic behavior (contact angle hysteresis). Here, methods of adjusting contact angle hysteresis (CAH) were proposed, and then, the CAH effect on the hydrodynamics was investigated. A multiscale analysis of CAH effect, from interfacial force and wettability to single-bubble and gas–liquid two-phase flow inside the foam to bubble swarm hydrodynamics, was conducted, and thus, the hydrodynamic performance criteria were derived. The interfaces had similar contact angles, whereas a significant difference in the CAH was prepared by using the developed sol dip-coating and spray coating methods. Subsequent experiments revealed that lower CAH can decrease the pressure drop, homogenize the gas distribution, and increase the weeping rate, which are consistent with the derived criteria.

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