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Title: Design of Aminopolymer Structure to Enhance Performance and Stability of CO 2 Sorbents: Poly(propylenimine) vs Poly(ethylenimine)

Abstract

Studies on aminopolymer/oxide composite materials for direct CO 2 capture from air have often focused on the prototypical poly(ethylenimine) (PEI) as the aminopolymer. But, it is known that PEI will oxidatively degrade at elevated temperatures. This degradation has been ascribed to the presence of secondary amines, which, when oxidized, lose their CO 2 capture capacity. We demonstrate the use of small molecule poly(propylenimine) (PPI) in linear and dendritic architectures supported in silica as adsorbent materials for direct CO 2 capture from air. Regardless of amine loading or aminopolymer architecture, the PPI-based sorbents are found to be more efficient for CO 2 capture than PEI-based sorbents. Moreover, PPI is found to be more resistant to oxidative degradation than PEI, even while containing secondary amines, as supported by FTIR, NMR, and ESI-MS studies. Our results suggest that PPI-based CO 2 sorbents may allow for longer sorbent working lifetimes due to an increased tolerance to sorbent regeneration conditions and suggest that the presence of secondary amines may not mean that all aminopolymers will oxidatively degrade.

Authors:
ORCiD logo [1];  [1];  [2]; ORCiD logo [1]; ORCiD logo [1]
  1. School of Chemical &, Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Drive, Atlanta, Georgia 30332, United States
  2. Global Thermostat LLC, 311 Ferst Drive, Atlanta, Georgia 30332, United States
Publication Date:
Research Org.:
Georgia Institute of Technology, Atlanta, GA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1345549
Alternate Identifier(s):
OSTI ID: 1347360
Grant/Contract Number:  
SC0012577
Resource Type:
Journal Article: Published Article
Journal Name:
Journal of the American Chemical Society
Additional Journal Information:
Journal Name: Journal of the American Chemical Society Journal Volume: 139 Journal Issue: 10; Journal ID: ISSN 0002-7863
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE

Citation Formats

Pang, Simon H., Lee, Li-Chen, Sakwa-Novak, Miles A., Lively, Ryan P., and Jones, Christopher W. Design of Aminopolymer Structure to Enhance Performance and Stability of CO 2 Sorbents: Poly(propylenimine) vs Poly(ethylenimine). United States: N. p., 2017. Web. doi:10.1021/jacs.7b00235.
Pang, Simon H., Lee, Li-Chen, Sakwa-Novak, Miles A., Lively, Ryan P., & Jones, Christopher W. Design of Aminopolymer Structure to Enhance Performance and Stability of CO 2 Sorbents: Poly(propylenimine) vs Poly(ethylenimine). United States. doi:10.1021/jacs.7b00235.
Pang, Simon H., Lee, Li-Chen, Sakwa-Novak, Miles A., Lively, Ryan P., and Jones, Christopher W. Fri . "Design of Aminopolymer Structure to Enhance Performance and Stability of CO 2 Sorbents: Poly(propylenimine) vs Poly(ethylenimine)". United States. doi:10.1021/jacs.7b00235.
@article{osti_1345549,
title = {Design of Aminopolymer Structure to Enhance Performance and Stability of CO 2 Sorbents: Poly(propylenimine) vs Poly(ethylenimine)},
author = {Pang, Simon H. and Lee, Li-Chen and Sakwa-Novak, Miles A. and Lively, Ryan P. and Jones, Christopher W.},
abstractNote = {Studies on aminopolymer/oxide composite materials for direct CO2 capture from air have often focused on the prototypical poly(ethylenimine) (PEI) as the aminopolymer. But, it is known that PEI will oxidatively degrade at elevated temperatures. This degradation has been ascribed to the presence of secondary amines, which, when oxidized, lose their CO2 capture capacity. We demonstrate the use of small molecule poly(propylenimine) (PPI) in linear and dendritic architectures supported in silica as adsorbent materials for direct CO2 capture from air. Regardless of amine loading or aminopolymer architecture, the PPI-based sorbents are found to be more efficient for CO2 capture than PEI-based sorbents. Moreover, PPI is found to be more resistant to oxidative degradation than PEI, even while containing secondary amines, as supported by FTIR, NMR, and ESI-MS studies. Our results suggest that PPI-based CO2 sorbents may allow for longer sorbent working lifetimes due to an increased tolerance to sorbent regeneration conditions and suggest that the presence of secondary amines may not mean that all aminopolymers will oxidatively degrade.},
doi = {10.1021/jacs.7b00235},
journal = {Journal of the American Chemical Society},
issn = {0002-7863},
number = 10,
volume = 139,
place = {United States},
year = {2017},
month = {3}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1021/jacs.7b00235

Citation Metrics:
Cited by: 6 works
Citation information provided by
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