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Geometry effect on membrane absorption for CO2 capture. Part I: A hybrid modeling approach |
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| Authors: | Kaiyun Fu Sunyang Wang Zhenbin Gu Yushu Liu Tianming Zai Shijie Li Xianfu Chen Minghui Qiu Yiqun Fan |
| Affiliation: | 1. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing Tech University, Nanjing, China
Contribution: Methodology (lead), Writing - original draft (lead), Writing - review & editing (lead);2. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing Tech University, Nanjing, China Contribution: Data curation (equal), Investigation (equal);3. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing Tech University, Nanjing, China Contribution: Investigation (equal), Methodology (equal);4. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing Tech University, Nanjing, China Contribution: Methodology (equal), Software (equal);5. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing Tech University, Nanjing, China Contribution: Investigation (equal), Visualization (equal);6. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing Tech University, Nanjing, China Contribution: Methodology (equal), Resources (equal), Visualization (equal);7. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing Tech University, Nanjing, China |
| Abstract: | Membrane absorption (MA) has a great prospect for CO2 capture. In MA modeling, conventional one-dimensional (1D)- and two-dimensional (2D)-models make simplification of membrane contactor (MC) geometry. Geometry simplification allows an easy process modeling and numerical solution, however, is only reasonable for particular MCs. Here, efforts are underway to quantify the geometry effect on the MA-CO2 performance. First, we proposed a rigorous 3D model without geometry simplification for simulating the MA-CO2 process in real MCs and then validated it with experimental data. More importantly, we highlighted a preferable hybrid model in which two correction factors were introduced to a 2D model to make the simulation results approximately equal to the 3D simulation values. The correction factors were correlated with dimensionless fluid dynamic parameters for characterizing the geometry effects on flowing fluids. Such hybrid modeling contributes to characterizing the influence of geometry on the MA-CO2 performance and improving computation accuracy-efficiency combinations. |
| Keywords: | absorption carbon dioxide capture geometry effect membrane contactor modeling |