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In relation to this article, we declare that there is no conflict of interest.
Publication history
Received April 30, 2019
Accepted June 5, 2019
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Synergistic effect of blended primary and secondary amines functionalized onto the silica on CO2 capture performance

Department of Chemical Engineering, Kongju National University, 1223-24 Cheonan-daero, Seobuk-gu, Cheonan-si, Chungcheongnam-do 31080, Korea
Korean Journal of Chemical Engineering, August 2019, 36(8), 1267-1273(7), 10.1007/s11814-019-0321-z
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Abstract

Amine-functionalized silica sorbents were synthesized by blending (3-aminopropyl)trimethoxysilane (1NSP) and [3-(methylamino)propyl]trimethoxysilane (1NS-S) of varying proportions and incorporating it in the support via incipient wetness technique. Adsorption characteristics were examined at a design adsorption temperature of 30 °C. The blended amine adsorbents exhibited higher CO2 adsorption capacity (5.6-6.4 wt%) and CO2/N efficiency (0.47- 0.48) than 1NS-P and 1NS-S. Among the blended amine adsorbents synthesized in this work, 1NS-PS-50, which has 50% primary amine and 50% secondary amine, is the most ideal for post-combustion CO2 capture application because it has high CO2 adsorption capacity, high CO2/N efficiency, and better performance than its diamine counterpart, N- [3-(trimethoxysilyl)propyl]ethylenediamine.

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