Process intensification in vapor-liquid mass transfer: The state-of-the-art

The concept of process intensification (PI) has absorbed diverse definitions and stays true to the mission-do more with less, which is an approach purposed by chemical engineers to solve the global energy & environment problems. To date, the focus of PI has been on processes mainly involving vapor/liquid systems. Based on the fundamental principles of vapor-liquid mass transfer process like distillation and absorption, there are three strategies to intensify interphase mass transfer enhancing the overall driving force, improving the mass transfer coefficient and enlarging the vapor-liquid interfacial area. More specifically, this article herein provides an overview of various technologies to strengthen the vapor-liquid mass transfer, including application of external fields, addition of third substances, micro-chemical technology and usage of solid foam, with the objective to contribute to the future developments and potential applications of PI in scientific research and industrial sectors. (C) 2018 The Chemical Industry and Engineering Society of China, and Chemical Industry Press Co., Ltd. All rights reserved.