Encapsulation of 2-amino-2-methyl-1-propanol with tetraethyl orthosilicate for CO2 capture
Sidra Rama1, Yan Zhang1, Fideline Tchuenbou-Magaia2, Yulong Ding1, Yongliang Li1()
1. School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B12 2TT, UK 2. School of Engineering, University of Wolverhampton, Wolverhampton WV1 1LY, UK
Carbon capture is widely recognised as an essential strategy to meet global goals for climate protection. Although various CO2 capture technologies including absorption, adsorption and membrane exist, they are not yet mature for post-combustion power plants mainly due to high energy penalty. Hence researchers are concentrating on developing non-aqueous solvents like ionic liquids, CO2-binding organic liquids, nanoparticle hybrid materials and microencapsulated sorbents to minimize the energy consumption for carbon capture. This research aims to develop a novel and efficient approach by encapsulating sorbents to capture CO2 in a cold environment. The conventional emulsion technique was selected for the microcapsule formulation by using 2-amino-2-methyl-1-propanol (AMP) as the core sorbent and silicon dioxide as the shell. This paper reports the findings on the formulated microcapsules including key formulation parameters, microstructure, size distribution and thermal cycling stability. Furthermore, the effects of microcapsule quality and absorption temperature on the CO2 loading capacity of the microcapsules were investigated using a self-developed pressure decay method. The preliminary results have shown that the AMP microcapsules are promising to replace conventional sorbents.
. [J]. Frontiers of Chemical Science and Engineering, 2019, 13(4): 672-683.
Sidra Rama, Yan Zhang, Fideline Tchuenbou-Magaia, Yulong Ding, Yongliang Li. Encapsulation of 2-amino-2-methyl-1-propanol with tetraethyl orthosilicate for CO2 capture. Front. Chem. Sci. Eng., 2019, 13(4): 672-683.
Highest CO2 loading capacity, low regeneration temp
Shell
TEOS
Permeability to gas
Immiscible phase
Mineral oil
Immiscibility with core
Tab.1
Fig.2
Fig.3
Fig.4
Fig.5
Fig.6
Sample
BET surface area /(m2·g?1)
Pore volume /(m2·g?1)
Average pore size /Å
1
29
0.051
71
2
92
0.097
43
3
34
0.061
72
Tab.2
Fig.7
Fig.8
Fig.9
Fig.10
Fig.11
Fig.12
Fig.13
Fig.14
Fig.15
Fig.16
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