Mass Transfer Rate Enhancement for CO2 Separation by Ionic Liquids

Effect of Film Thickness

Document identifier: oai:DiVA.org:ltu-7673
Access full text here:10.1021/acs.iecr.5b03339
Keyword: Engineering and Technology, Mechanical Engineering, Energy Engineering, Teknik och teknologier, Maskinteknik, Energiteknik
Publication year: 2016
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Abstract:

Ionic liquids (ILs) are promising in CO2 separation, while the film thickness is particularly critical for gas transport in these viscous and expensive liquids. In this work, the influence of IL-film thickness on CO2 absorption/desorption of two different IL immobilized sorbents was investigated, in which the results from the thermogravimetric analyzer were further used to estimate the scale of IL-film thickness. It is found that the IL-film in nanoscale is a prerequisite for efficient CO2 absorption/desorption; the equilibrium time can be 10-times different, and the rate constant can be 100-times different for microscale and nanoscale IL-films. This is the first time to quantitatively reveal the influence of IL-film thickness and find out its scale for a significant rate enhancement in the CO2 absorption/desorption by IL immobilized sorbents

Authors

Wenlong Xie

Department of Chemistry and Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing
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Xiaoyan Ji

Luleå tekniska universitet; Energivetenskap
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Xin Feng

State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing University of Chemical Technology, State Key Laboratory of Materials-Oriented Chemical Engineering, N
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Xiaohua Lu

State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology, College of Chemistry and Chemical Engineering, Nanjing University of Technology, Department of Chemistry and Chemical Engineering, State Key Laboratory of M
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