Molecular dynamics study of carbon dioxide and nitrogen selectivity through poly[bis((methoxyethoxy)ethoxy)phosphazene] (MEEP) membrane
Journal Article
·
· Chemical Engineering Science
- Idaho National Laboratory (INL), Idaho Falls, ID (United States)
Here, a molecular dynamics simulation model was developed to comprehensively understand carbon dioxide over nitrogen (CO2/N2) selectivity through polyphosphazene-based membrane comprising of poly[bis((methoxyethoxy)ethoxy)phosphazene] (MEEP) selective layer at the molecular level. The effects of temperature, pressure, and initial feed gas composition on the CO2 transport on a polymer membrane were studied. The computed free energy and density profile of the permeating gas mixture exhibited that CO2 molecules express higher interactions with the membrane than N2 molecules, resulting in higher CO2/N2 selectivity. Statistical analysis of gas molecules (CO2, water (H2O), and N2) transportation suggested that hydro- and CO2-philic functional groups in the membrane significantly impact CO2 permeability and CO2/N2 selectivity. This study suggested that Lewis acid–base and hydrogen bonding combinations contribute to CO2 permeation and CO2/N2 selectivity. An equal CO2/N2 selectivity was observed with and without water vapor in the feed gas suggesting that water does not hinder CO2 transport through the membrane.
- Research Organization:
- Idaho National Laboratory (INL), Idaho Falls, ID (United States)
- Sponsoring Organization:
- USDOE; USDOE Laboratory Directed Research and Development (LDRD) Program
- Grant/Contract Number:
- AC07-05ID14517
- OSTI ID:
- 2274765
- Alternate ID(s):
- OSTI ID: 2368942
- Report Number(s):
- INL/JOU--23-72481-Revision-0
- Journal Information:
- Chemical Engineering Science, Journal Name: Chemical Engineering Science Vol. 284; ISSN 0009-2509
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
sup 7 Li NMR study of polymer electrolytes based on composites of poly(bis((methoxyethoxy)ethoxy)phosphazene) and poly(ethylene oxide)
Phosphazene membranes for gas separations
On the Mechanism of Ion Transport through Polyphosphazene Solid Polymer Electrolytes 1: NMR, IR, and Raman Spectroscopic Studies and Computational Analysis of 15N Labeled Polyphosphazenes
Journal Article
·
· Chemistry of Materials; (United States)
·
OSTI ID:7238924
Phosphazene membranes for gas separations
Patent
·
Tue Jul 11 00:00:00 EDT 2006
·
OSTI ID:1175823
On the Mechanism of Ion Transport through Polyphosphazene Solid Polymer Electrolytes 1: NMR, IR, and Raman Spectroscopic Studies and Computational Analysis of 15N Labeled Polyphosphazenes
Journal Article
·
Fri Feb 28 23:00:00 EST 2003
· Journal of the American Chemical Society
·
OSTI ID:912152