Investigation of CO<sub>2</sub> Adsorption on Avocado Stone-Derived Activated Carbon Obtained through NaOH Treatment
Activated carbons were prepared from avocado stone through NaOH activation and subsequent carbonization. The following textural parameters were achieved: specific surface area: 817–1172 m<sup>2</sup>/g, total pore volume: 0.538–0.691 cm<sup>3</sup>/g, micropore volume 0.259–0...
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MDPI AG
2023-06-01
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| Online Access: | https://www.mdpi.com/1996-1944/16/12/4390 |
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| author | Joanna Siemak Rafał J. Wróbel Jakub Pęksiński Beata Michalkiewicz |
| author_facet | Joanna Siemak Rafał J. Wróbel Jakub Pęksiński Beata Michalkiewicz |
| author_sort | Joanna Siemak |
| collection | DOAJ |
| description | Activated carbons were prepared from avocado stone through NaOH activation and subsequent carbonization. The following textural parameters were achieved: specific surface area: 817–1172 m<sup>2</sup>/g, total pore volume: 0.538–0.691 cm<sup>3</sup>/g, micropore volume 0.259–0.375 cm<sup>3</sup>/g. The well-developed microporosity resulted in a good CO<sub>2</sub> adsorption value of 5.9 mmol/g at a temperature of 0 °C and 1 bar and selectivity over nitrogen for flue gas simulation. The activated carbons were investigated using nitrogen sorption at −196 °C, CO<sub>2</sub> sorption, X-ray diffraction, and SEM. It was found that the adsorption data were more in line with the Sips model. The isosteric heat of adsorption for the best sorbent was calculated. It was found that the isosteric heat of adsorption changed in the range of 25 to 40 kJ/mol depending on the surface coverage. The novelty of the work is the production of highly microporous activated carbons from avocado stones with high CO<sub>2</sub> adsorption. Before now, the activation of avocado stones using NaOH had never been described. |
| first_indexed | 2024-03-11T02:12:02Z |
| format | Article |
| id | doaj.art-0594cc8259f04956bda95e65a84ec97f |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T02:12:02Z |
| publishDate | 2023-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-0594cc8259f04956bda95e65a84ec97f2023-11-18T11:25:35ZengMDPI AGMaterials1996-19442023-06-011612439010.3390/ma16124390Investigation of CO<sub>2</sub> Adsorption on Avocado Stone-Derived Activated Carbon Obtained through NaOH TreatmentJoanna Siemak0Rafał J. Wróbel1Jakub Pęksiński2Beata Michalkiewicz3Department of Catalytic and Sorbent Materials Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, Piastów Ave. 42, 71-065 Szczecin, PolandDepartment of Catalytic and Sorbent Materials Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, Piastów Ave. 42, 71-065 Szczecin, PolandFaculty of Electrical Engineering, West Pomeranian University of Technology, 26 Kwietnia St. 10, 71-126 Szczecin, PolandDepartment of Catalytic and Sorbent Materials Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, Piastów Ave. 42, 71-065 Szczecin, PolandActivated carbons were prepared from avocado stone through NaOH activation and subsequent carbonization. The following textural parameters were achieved: specific surface area: 817–1172 m<sup>2</sup>/g, total pore volume: 0.538–0.691 cm<sup>3</sup>/g, micropore volume 0.259–0.375 cm<sup>3</sup>/g. The well-developed microporosity resulted in a good CO<sub>2</sub> adsorption value of 5.9 mmol/g at a temperature of 0 °C and 1 bar and selectivity over nitrogen for flue gas simulation. The activated carbons were investigated using nitrogen sorption at −196 °C, CO<sub>2</sub> sorption, X-ray diffraction, and SEM. It was found that the adsorption data were more in line with the Sips model. The isosteric heat of adsorption for the best sorbent was calculated. It was found that the isosteric heat of adsorption changed in the range of 25 to 40 kJ/mol depending on the surface coverage. The novelty of the work is the production of highly microporous activated carbons from avocado stones with high CO<sub>2</sub> adsorption. Before now, the activation of avocado stones using NaOH had never been described.https://www.mdpi.com/1996-1944/16/12/4390CO<sub>2</sub> adsorptioncarbon captureavocado stoneactivated carbonsselectivity |
| spellingShingle | Joanna Siemak Rafał J. Wróbel Jakub Pęksiński Beata Michalkiewicz Investigation of CO<sub>2</sub> Adsorption on Avocado Stone-Derived Activated Carbon Obtained through NaOH Treatment Materials CO<sub>2</sub> adsorption carbon capture avocado stone activated carbons selectivity |
| title | Investigation of CO<sub>2</sub> Adsorption on Avocado Stone-Derived Activated Carbon Obtained through NaOH Treatment |
| title_full | Investigation of CO<sub>2</sub> Adsorption on Avocado Stone-Derived Activated Carbon Obtained through NaOH Treatment |
| title_fullStr | Investigation of CO<sub>2</sub> Adsorption on Avocado Stone-Derived Activated Carbon Obtained through NaOH Treatment |
| title_full_unstemmed | Investigation of CO<sub>2</sub> Adsorption on Avocado Stone-Derived Activated Carbon Obtained through NaOH Treatment |
| title_short | Investigation of CO<sub>2</sub> Adsorption on Avocado Stone-Derived Activated Carbon Obtained through NaOH Treatment |
| title_sort | investigation of co sub 2 sub adsorption on avocado stone derived activated carbon obtained through naoh treatment |
| topic | CO<sub>2</sub> adsorption carbon capture avocado stone activated carbons selectivity |
| url | https://www.mdpi.com/1996-1944/16/12/4390 |
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