Effect of Surface Treatment by O3 and Chemical Activation by Alkali Metal on the Performance of ACFs on Adsorption and Desorption of BTX Gases
Abstract
:1. Introduction
2. Materials and Methods
2.1. Successive ST-CA Process for the Preparation of the Upgraded ACFs
2.2. Characterization of Chemical and Physical Properties of ACFs
2.3. VOCs Adsorption—Desorption with ACFs before and after Surface Treatment and Chemical Activation
3. Results and Discussion
4. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Textural Properties of ACFs | Untreated | ST | CA | ST→CA | |
---|---|---|---|---|---|
Before Heat Treatment | After Heat Treatment | ||||
BET surface area (m2/g) | 1483 ± 128.2 | 796 ± 76.3 | 1390 ± 108.2 | 1998 ± 140.2 | 2743 ± 203 |
Total pore volume (cm3/g, P/Po = 0.99) | 0.7512 ± 0.063 | 0.4313 ± 0.045 | 0.5498 ± 0.044 | 1.414 ± 0.141 | 1.5053 ± 0.193 |
Average pore diameter (nm) | 1.931 ± 0.082 | 1.841 ± 0.077 | 1.959 ± 0.074 | 1.912 ± 0.072 | 2.512 ± 0.12 |
Average micropore diameter (nm) | 0.744 ± 0.065 | 0.715 ± 0.080 | 0.759 ± 0.044 | 0.735 ± 0.054 | 1.014 ± 0.015 |
Micropore volume (cm3/g, P/Po = 0.1) | 0.5477 ± 0.034 | 0.2929 ± 0.017 | 0.4992 ± 0.023 | 0.7346 ± 0.045 | 0.9621 ± 0.075 |
Micropore volume percent (%) | 72.9 ± 5.66 | 67.9 ± 4.31 | 88.3 ± 2.4 | 51.9 ± 10.2 | 63.9 ± 3.14 |
Micropore area (m2/g, P/Po = 0.1) | 1199 ± 102.3 | 398 ± 20.9 | 1227 ± 10.3 | 2099 ± 180.2 | 2331 ± 222.1 |
External area (m2/g, P/Po = 0.1) | 165 ± 15.6 | 30 ± 3.2 | 163 ± 10.6 | 136 ± 20.3 | 310 ± 29.2 |
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Jang, J.H.; Han, G.B. Effect of Surface Treatment by O3 and Chemical Activation by Alkali Metal on the Performance of ACFs on Adsorption and Desorption of BTX Gases. Int. J. Environ. Res. Public Health 2020, 17, 5422. https://doi.org/10.3390/ijerph17155422
Jang JH, Han GB. Effect of Surface Treatment by O3 and Chemical Activation by Alkali Metal on the Performance of ACFs on Adsorption and Desorption of BTX Gases. International Journal of Environmental Research and Public Health. 2020; 17(15):5422. https://doi.org/10.3390/ijerph17155422
Chicago/Turabian StyleJang, Jung Hee, and Gi Bo Han. 2020. "Effect of Surface Treatment by O3 and Chemical Activation by Alkali Metal on the Performance of ACFs on Adsorption and Desorption of BTX Gases" International Journal of Environmental Research and Public Health 17, no. 15: 5422. https://doi.org/10.3390/ijerph17155422