Adsorption of Volatile Organic Compounds and Microwave Regeneration on Self-prepared High-surface-area Beaded Activated Carbon
Abstract Self-prepared beaded activated carbons (SBAC) were derived from carbonized phenolic formaldehyde (PF) resins through an optimal activation procedure (900°C for 4 h) using CO2 and compared with a commercial BAC (termed KBAC) over physicochemical properties, adsorption performance against met...
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| Format: | Article |
| Language: | English |
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Springer
2022-04-01
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| Series: | Aerosol and Air Quality Research |
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| Online Access: | https://doi.org/10.4209/aaqr.220010 |
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| author | Shih-Ying Hsiao Shu-Wen You Can Wang Ji-Guang Deng Hsing-Cheng Hsi |
| author_facet | Shih-Ying Hsiao Shu-Wen You Can Wang Ji-Guang Deng Hsing-Cheng Hsi |
| author_sort | Shih-Ying Hsiao |
| collection | DOAJ |
| description | Abstract Self-prepared beaded activated carbons (SBAC) were derived from carbonized phenolic formaldehyde (PF) resins through an optimal activation procedure (900°C for 4 h) using CO2 and compared with a commercial BAC (termed KBAC) over physicochemical properties, adsorption performance against methyl ethyl ketone (MEK) and toluene (TOL), and their regenerability. Langmuir, Freundlich, and Dubinin‒Radushkevich (D‒R) isotherm models showed good fitting results. The isosteric heat of adsorption was calculated using the Clausius-Clapeyron equation; the parameters obtained from the D‒R isotherm indicate that the physisorption predominates the adsorption process. Microwave heating was applied to regenerate the saturated adsorbents to examine the effect of irradiation power and heating time on the desorption behavior. Within 12 min of microwave irradiation, excellent desorption efficiencies were shown, reaching 110 ± 14.4%, 104 ± 2.6%, 90.2 ± 2.3%, and 85.5 ± 5.7% for MEK-SBAC, MEK-KBAC, TOL-SBAC, and TOL-KBAC samples, respectively. Kinetic models were further employed to illustrate the desorption behavior, showing that intraparticle diffusion in SBAC and KBAC was the rate-limiting step during microwave heating. The core kinetic parameters could provide insights for lab-scale or practical engineering scale design. In conclusion, this study demonstrates the excellent adsorption performance of SBAC and the feasibility of microwave regeneration of BACs. |
| format | Article |
| id | doaj-art-5af7b1d739884c64b828924258080811 |
| institution | Kabale University |
| issn | 1680-8584 2071-1409 |
| language | English |
| publishDate | 2022-04-01 |
| publisher | Springer |
| record_format | Article |
| series | Aerosol and Air Quality Research |
| spelling | doaj-art-5af7b1d739884c64b8289242580808112025-02-09T12:17:23ZengSpringerAerosol and Air Quality Research1680-85842071-14092022-04-0122611510.4209/aaqr.220010Adsorption of Volatile Organic Compounds and Microwave Regeneration on Self-prepared High-surface-area Beaded Activated CarbonShih-Ying Hsiao0Shu-Wen You1Can Wang2Ji-Guang Deng3Hsing-Cheng Hsi4Graduate Institute of Environmental Engineering, National Taiwan UniversityGraduate Institute of Environmental Engineering, National Taiwan UniversitySchool of Environmental Science and Engineering, Tianjin UniversityCollege of Environmental and Energy Engineering, Beijing University of TechnologyGraduate Institute of Environmental Engineering, National Taiwan UniversityAbstract Self-prepared beaded activated carbons (SBAC) were derived from carbonized phenolic formaldehyde (PF) resins through an optimal activation procedure (900°C for 4 h) using CO2 and compared with a commercial BAC (termed KBAC) over physicochemical properties, adsorption performance against methyl ethyl ketone (MEK) and toluene (TOL), and their regenerability. Langmuir, Freundlich, and Dubinin‒Radushkevich (D‒R) isotherm models showed good fitting results. The isosteric heat of adsorption was calculated using the Clausius-Clapeyron equation; the parameters obtained from the D‒R isotherm indicate that the physisorption predominates the adsorption process. Microwave heating was applied to regenerate the saturated adsorbents to examine the effect of irradiation power and heating time on the desorption behavior. Within 12 min of microwave irradiation, excellent desorption efficiencies were shown, reaching 110 ± 14.4%, 104 ± 2.6%, 90.2 ± 2.3%, and 85.5 ± 5.7% for MEK-SBAC, MEK-KBAC, TOL-SBAC, and TOL-KBAC samples, respectively. Kinetic models were further employed to illustrate the desorption behavior, showing that intraparticle diffusion in SBAC and KBAC was the rate-limiting step during microwave heating. The core kinetic parameters could provide insights for lab-scale or practical engineering scale design. In conclusion, this study demonstrates the excellent adsorption performance of SBAC and the feasibility of microwave regeneration of BACs.https://doi.org/10.4209/aaqr.220010Volatile organic compoundsTolueneMethyl ethyl ketoneBeaded activated carbonMicrowave regeneration |
| spellingShingle | Shih-Ying Hsiao Shu-Wen You Can Wang Ji-Guang Deng Hsing-Cheng Hsi Adsorption of Volatile Organic Compounds and Microwave Regeneration on Self-prepared High-surface-area Beaded Activated Carbon Aerosol and Air Quality Research Volatile organic compounds Toluene Methyl ethyl ketone Beaded activated carbon Microwave regeneration |
| title | Adsorption of Volatile Organic Compounds and Microwave Regeneration on Self-prepared High-surface-area Beaded Activated Carbon |
| title_full | Adsorption of Volatile Organic Compounds and Microwave Regeneration on Self-prepared High-surface-area Beaded Activated Carbon |
| title_fullStr | Adsorption of Volatile Organic Compounds and Microwave Regeneration on Self-prepared High-surface-area Beaded Activated Carbon |
| title_full_unstemmed | Adsorption of Volatile Organic Compounds and Microwave Regeneration on Self-prepared High-surface-area Beaded Activated Carbon |
| title_short | Adsorption of Volatile Organic Compounds and Microwave Regeneration on Self-prepared High-surface-area Beaded Activated Carbon |
| title_sort | adsorption of volatile organic compounds and microwave regeneration on self prepared high surface area beaded activated carbon |
| topic | Volatile organic compounds Toluene Methyl ethyl ketone Beaded activated carbon Microwave regeneration |
| url | https://doi.org/10.4209/aaqr.220010 |
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