The role of single deformed bubble on porous foam tray with submerged orifices on the mass transfer enhancement  

作　　者：Peng Yan Xueli Geng Jian Na Hong Li Xin Gao 

机构地区：[1]School of Chemical Engineering and Technology,National Engineering Research Center of Distillation Technology,Collaborative Innovation Center of Chemical Science and Engineering(Tianjin),Tianjin University,Tianjin 300350,China [2]College of Petrochemical Technology,Lanzhou University of Technology,Lanzhou 730050,China [3]Haihe Laboratory of Sustainable Chemical Transformations,Tianjin 300192,China

出　　处：《Frontiers of Chemical Science and Engineering》2023年第12期2127-2143,共17页化学科学与工程前沿（英文版）

基　　金：grateful for the financial support from the National Natural Science Foundation of China(Grant No.22178249).

摘　　要：Foam trays with porous submerged orifices endow bubbles uniformly distributed,which are considered attractive column internals to enhance the gas-liquid mass transfer process.However,its irregular orifice and complex gas-liquid flow make it lack pore-scale investigations concerning the transfer mechanism of dynamic bubbling.In this work,the actual porous structure of the foam tray is obtained based on micro computed tomography technology.The shape,dynamic,and mass transfer of rising bubbles at porous orifices are investigated using the volume of fluid and continue surface force model.The results demonstrate that the liquid encroaching on the gas channels causes the increasing orifices velocity,which makes the trailing bubble easily detach from the midst of the leading bubble and causes pairing coalescence.Additionally,we found that the central breakup regimes significantly improve the gas-liquid interface area and mass transfer efficiency.This discovery exemplifies the mechanism of mass transfer intensification for foam trays and serves to promote its further development.

关 键 词：bubble formation porous submerged orifices process intensification foam tray 

分 类 号：O35[理学—流体力学]