(45e) Post-Combustion CO2 Capture Using PAI Polymer/Silica/PEI Hollow Fiber Sorbents

Labreche, Y., Georgia Institute of Technology
Fan, Y., University of Connecticut
Rezaei, F., Georgia Institude of Technology
Lively, R. P., Georgia Institute of Technology
Koros, W. J., Georgia Institute of Technology

Post-combustion CO2 capture using PAI polymer/silica/PEI hollow fiber sorbents


Ying Labreche1, Yanfang Fang1, Fateme Rezaei1, Ryan P. Lively2, Christopher W. Jones1,*, William J. Koros1,*

1 Georgia Institute of Technology, 311 Ferst Drive NW, Atlanta, GA 30332-0100, USA

2 Algenol Biofuels, 28100 Bonita Grande Drive, Bonita Springs, Florida 34315, United States



Amine-loaded cellulose acetate (CA) polymer/silica hollow fiber sorbents for post-combustion CO2 recovery were created successfully by utilizing a post-spinning amine infusion technique [1]. After initial work focusing on CA fibers [1-2], poly(amide-imide) (PAI), fibers were created, as this polymer is more thermally and mechanically stable than CA.  Poly(ethyleneimine) (PEI) was infused into PAI/mesoporous silica hollow fiber sorbents during the solvent exchange steps after fiber spinning.  After infusing the 50 wt% silica hollow fiber sorbents with 10% PEI solutions in methanol, the fiber sorbents were demonstrated to have an equilibrium CO2 uptake of ca. 1.1 mmol/g-fiber in TGA tests using dry, 10% CO2 simulated gas streams. 

Several amine-loaded fibers were assembled into shell-and-tube modules and exposed on the shell side at 1 atm and 35 °C to simulated flue gas with an inert tracer (14 mol% CO2, 72 mol% N2 and 14 mol% He at 100% R.H.).  The humid breakthrough CO2 capacity and the humid CO2 and “equilibrium” uptake at 1 atm and 35 °C were tested.  The results indicate that the post-spinning infusion method provides a versatile platform for ultimate scale-up of practical amine sorbents for flue gas CO2 recovery applications.

 [1]Y. Labreche, R.P. Lively, F. Rezaei, G. Chen, C.W. Jones, W.J. Koros, Post-spinning infusion of poly(ethyleneimine) into polymer/silica hollow fiber sorbents for carbon dioxide capture Chem. Eng. J., 219 (2013) 166-175

[2] F. Rezaei, R. Lively, Y. Labreche, G. Chen, Y. Fan, W.J.  Koros, C.W. Jones, Aminosilane-grafted polymer/silica hollow fiber adsorbents for CO2 capture from flue gas, ACS Appl. Mater. Interfaces, 5 (2013) 3921-3931