Composite Hollow Fiber Membranes for Post Combustion CO2 Capture

Composite Hollow Fiber Membranes for Post Combustion CO₂ Capture

Ali A. Rownaghi¹, William J. Koros¹, Dhaval Bhandari²

¹School of Chemical and Biomolecular Engineering, 311 Ferst Dr. NW, Atlanta, GA 30332

²GE Global Research Center, 1 Research Cir, Niskayuna, NY 12309

Fabrication of composite hollow fiber membranes with a thin polymeric permselective layer coated on a highly porous substrate for gas separation applications is attractive to provide both high flux and selectivity. The selective layer and the highly porous substrate described in this work are made from a combination of organic/inorganic materials. High porosity polyamide-imide (PAI) hollow fiber substrates were fabricated and characterized by scanning electron microscopy. The porous substrates were then coated with poly[bis-(2-(2-methoxy) ethoxy)ethoxyphosphazene] (MEEP) to create a permselective skin layer. The fabricated membrane performance was verified by permeation tests with He, N₂ and CO₂ at 35 °C and 30 psi. The membranes were found to have CO₂/N₂ selectivity up to 37. The increase in CO₂/N₂ selectivity for some membranes was accompanied by an increase in CO₂ permeance. 

Acknowledgment

The material described in the abstract is based upon work supported by the Department of Energy National energy Technology Laboratory (DOE-NETL) under award number DE-FE0007514.

 

Disclaimer

This abstract was prepared as an account of work sponsored by an agency of the United States Government.  Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights.  Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof.  The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof.