Abstract
© 2014 Macmillan Publishers Limited. All rights reserved. Adsorption using solid amine sorbents is an attractive emerging technology for energy-efficient carbon capture. Current syntheses for solid amine sorbents mainly based on physical impregnation or grafting-to methods (for example, aminosilane-grafting) lead to limited sorbent performance in terms of stability and working capacity, respectively. Here we report a family of solid amine sorbents using a grafting-from synthesis approach and synthesized by cationic polymerization of oxazolines on mesoporous silica. The sorbent with high amount of covalently tethered amines shows fast adsorption rate, high amine efficiency and sorbent capacity well exceeding the highest value reported to date for lowerature carbon dioxide sorbents under simulated flue gas conditions. The demonstrated efficiency of the new amine-immobilization chemistry may open up new avenues in the development of advanced carbon dioxide sorbents, as well as other nitrogen-functionalized systems.
| Original language | English (US) |
|---|---|
| Journal | Nature Communications |
| Volume | 5 |
| Issue number | 1 |
| DOIs | |
| State | Published - Dec 12 2014 |
| Externally published | Yes |
Bibliographical note
KAUST Repository Item: Exported on 2020-10-01Acknowledged KAUST grant number(s): KUS-C1-018-02
Acknowledgements: This publication was based on work supported by Award Nos KUS-C1-018-02 and NPRP5-1437-1-243, made by King Abdullah University of Science and Technology and Qatar University, respectively. This work made use of the Cornell Center for Materials Research Shared Facilities that are supported through the NSF MRSEC programme (DMR-1120296). We thank Dr Ivan Keresztes and Dr David Kiemle for performing the NMR measurements.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.