TY - JOUR
T1 - New Approach to Enhance CO2 Capture of "molecular Basket" Sorbent by Using 3-Aminopropyltriethoxysilane to Reshape Fumed Silica Support
AU - Wang, Xiaoxing
AU - Fujii, Mamoru
AU - Song, Chunshan
N1 - Funding Information:
The authors gratefully acknowledge the partial financial support from the Pennsylvania State University through the Penn State Institutes of Energy and the Environment, and the U.S. Department of Energy through the National Energy Technology Laboratory via the contract DE-SC0013823 for the work on CO capture. 2
Publisher Copyright:
© 2020 American Chemical Society.
PY - 2020/4/15
Y1 - 2020/4/15
N2 - Here we report a new approach to enhance CO2 capture and separation over a solid molecular basket sorbent by reorganizing the aggregation of fumed silica (FS) support particles with the addition of 3-aminopropyltriethoxysilane (APTES). After APTES modification, although the surface area of fumed silica decreased, the total pore volume increased significantly, more than 2 times larger than that of fumed silica itself. Compared to fumed silica supported PEI sorbent, the 30PEI/APTES-FS sorbent can achieve a CO2 capacity as high as 130.4 mg-CO2/g-sorb, a 44% increase from 90.4 mg-CO2/g-sorb over 30PEI/FS. The amine efficiency of PEI for CO2 sorption was also improved by over 25%. Furthermore, both the CO2 sorption and desorption kinetics were greatly enhanced by 1.23 and 1.61 times, respectively, compared to the PEI/FS sorbent without APTES modification. In addition, the stability and regenerability of PEI/FS sorbent was also greatly improved.
AB - Here we report a new approach to enhance CO2 capture and separation over a solid molecular basket sorbent by reorganizing the aggregation of fumed silica (FS) support particles with the addition of 3-aminopropyltriethoxysilane (APTES). After APTES modification, although the surface area of fumed silica decreased, the total pore volume increased significantly, more than 2 times larger than that of fumed silica itself. Compared to fumed silica supported PEI sorbent, the 30PEI/APTES-FS sorbent can achieve a CO2 capacity as high as 130.4 mg-CO2/g-sorb, a 44% increase from 90.4 mg-CO2/g-sorb over 30PEI/FS. The amine efficiency of PEI for CO2 sorption was also improved by over 25%. Furthermore, both the CO2 sorption and desorption kinetics were greatly enhanced by 1.23 and 1.61 times, respectively, compared to the PEI/FS sorbent without APTES modification. In addition, the stability and regenerability of PEI/FS sorbent was also greatly improved.
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U2 - 10.1021/acs.iecr.9b06459
DO - 10.1021/acs.iecr.9b06459
M3 - Article
AN - SCOPUS:85084636309
SN - 0888-5885
VL - 59
SP - 7267
EP - 7273
JO - Industrial and Engineering Chemistry Research
JF - Industrial and Engineering Chemistry Research
IS - 15
ER -