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 oC. 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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Acknowledgements
This work was supported by a National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP) (2016R1D1A1B01009941). This work was also supported by the Human Resources Program in Energy Technology of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), granted financial resource from the Ministry of Trade, Industry & Energy, Republic of Korea (No. 20194010201730).
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Manianglung, C., Pacia, R.M. & Ko, Y.S. Synergistic effect of blended primary and secondary amines functionalized onto the silica on CO2 capture performance. Korean J. Chem. Eng. 36, 1267–1273 (2019). https://doi.org/10.1007/s11814-019-0321-z
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DOI: https://doi.org/10.1007/s11814-019-0321-z