Hydrodynamic modeling of ionic liquids and conventional amine solvents in bubble column

被引:12
作者
Ali, Muhammad Furqan [1 ]
Gan, Jieqing [2 ]
Chen, Xiaochun [1 ]
Yu, Guangren [1 ]
Zhang, Yuan [1 ]
Ellahi, Mujtaba [3 ]
Abdeltawab, Ahmed A. [4 ]
机构
[1] Beijing Univ Chem Technol, Coll Chem Engn, Beijing Key Lab Membrane Sci & Technol, Beijing 100029, Peoples R China
[2] Monash Univ, Dept Chem Engn, Lab Simulat & Modeling Particulate Syst, Clayton, Vic 3800, Australia
[3] Balochistan Univ Informat Technol Engn & Manageme, Fac Arts & Basic Sci, Dept Chem, Quetta 87100, Pakistan
[4] King Saud Univ, Coll Sci, Dept Chem, Riyadh 11451, Saudi Arabia
关键词
Bubble column; Conventional amine solvents; Hydrodynamics; Ionic liquids; Numerical modeling; POPULATION BALANCE-EQUATIONS; DIRECT QUADRATURE METHOD; NUMERICAL-SIMULATION; CFD SIMULATION; EXPERIMENTAL VALIDATION; SINGLE-BUBBLE; FLOW; GAS; MOMENTS; CO2;
D O I
10.1016/j.cherd.2017.11.034
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
The green solvent ionic liquids (ILs) are getting attention in variety of industries, because of their unique properties. Few studies explain the hydrodynamics of ILs, but the comparison with conventional amine solvents in CO2 capture process has not so farbeen reported. The primary target of this research is to develop a state of the art computational fluid dynamics (CFD) model that would be useful to understate hydrodynamic parameters of both ILs and conventional amine solvents in a glance. In present study, three ILs are investigated inside a 3D flat bubble column and their higher viscosities are examined vigilantly by comparison with three amine solvents. The flow pattern, liquid velocity magnitude, CO2 holdup and bubble size distribution are explained. It is reported that current CFD model may be used for higher viscous ILs and amine solvents. Compared with amine solvents, CO2 plume meandering behavior was not observed and very low gas holdup was obtain in ILs. The velocity magnitude of ILs increased with the height in bubble column, but a decreasing trend with column height was followed in the case of amine solvents. CO2 exhibited non coalescence behavior in ILs, but coalescence and breakup phenomena were seen in amine solvents. Finally, baffled type industrial tray column is also investigated and some useful hydrodynamic aspects in the comparison of pure ionic liquid, 90%-solution of ionic liquid and 30%-solution of MEA are drawn. The experimentally validated CFD model would be useful for switching to ILs from corrosive amine solvents and further investigation of new economical ILs. (C) 2017 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
引用
收藏
页码:356 / 375
页数:20
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