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Amine-Tethered Adsorbents Based on Three-Dimensional Macroporous Silica for CO2Capture from Simulated Flue Gas and Air

Authors :
Liu, Fa-Qian
Wang, Lei
Huang, Zhao-Ge
Li, Chao-Qin
Li, Wei
Li, Rong-Xun
Li, Wei-Hua
Source :
ACS Applied Materials & Interfaces; March 2014, Vol. 6 Issue: 6 p4371-4381, 11p
Publication Year :
2014

Abstract

New covalently tethered CO2adsorbents are synthesized through the in situ polymerization of N-carboxyanhydride (NCA) of l-alanine from amine-functionalized three-dimensional (3D) interconnected macroporous silica (MPS). The interconnected macropores provide low-resistant pathways for the diffusion of CO2molecules, while the abundant mesopores ensure the high pore volume. The adsorbents exhibit high molecular weight (of up to 13058 Da), high amine loading (more than 10.98 mmol N g–1), fast CO2capture kinetics (t1/2< 1 min), high adsorption capacity (of up to 3.86 mmol CO2g–1in simulated flue gas and 2.65 mmol CO2g–1in simulated ambient air under 1 atm of dry CO2), as well as good stability over 120 adsorption–desorption cycles, which allows the overall CO2capture process to be promising and sustainable.

Details

Language :
English
ISSN :
19448244
Volume :
6
Issue :
6
Database :
Supplemental Index
Journal :
ACS Applied Materials & Interfaces
Publication Type :
Periodical
Accession number :
ejs32226384
Full Text :
https://doi.org/10.1021/am500089g