Effect of carbonization temperature on characterization and water vapor adsorption of coffee-shell activated carbon
Coffee shells, which are abundant in cellulose and lignin, are good raw materials to prepare activated carbon. In this paper, coffee shells were selected as raw materials for activated carbon preparation by KOH chemical activation. Influence of carbonization temperature on adsorption capacity of wat...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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SAGE Publishing
2020-12-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1177/0263617420950994 |
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| _version_ | 1849761284058251264 |
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| author | Shengnan Sun Qiongfen Yu Ming Li Hong Zhao Yunfeng Wang Xu Ji |
| author_facet | Shengnan Sun Qiongfen Yu Ming Li Hong Zhao Yunfeng Wang Xu Ji |
| author_sort | Shengnan Sun |
| collection | DOAJ |
| description | Coffee shells, which are abundant in cellulose and lignin, are good raw materials to prepare activated carbon. In this paper, coffee shells were selected as raw materials for activated carbon preparation by KOH chemical activation. Influence of carbonization temperature on adsorption capacity of water vapor over activated carbon was researched. Thermogravimetric analysis was employed to select the scope of carbonization temperature. Activation energies of coffee shells pyrolyzed at different heating rates were calculated. Nitrogen adsorption/desorption isotherm and scanning electron microscopy (SEM) were adopted to characterize the activated carbon. And water vapor adsorption isotherms were simulated by the finite simplification model of Do-Do adsorption model. The results show that activation energies of coffee shells pyrolysis process with heating rates of 5, 10 and 20 K/min are 17.21, 18.01 and 57.52 kJ/mol, respectively. The optimal carbonization temperature of coffee shells is 923 K. The adsorption amount of water vapor can reach about 702.3 mg/g under experiment temperature of 298 K and relative humidity of 70%. The highest total pore volume and Brunauer–Emmett–Teller (BET) specific surface area are 1.41 cm 3 /g and 2817 m 2 /g, respectively. The simulation results of the finite simplification model are consistent well with water vapor adsorption experiment results. The results show that activated carbon prepared at the optimal condition would be the potential candidate for solar drying system. |
| format | Article |
| id | doaj-art-d5da42272e8f4fb88cfbe97d61254ae5 |
| institution | DOAJ |
| issn | 0263-6174 2048-4038 |
| language | English |
| publishDate | 2020-12-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj-art-d5da42272e8f4fb88cfbe97d61254ae52025-08-20T03:06:05ZengSAGE PublishingAdsorption Science & Technology0263-61742048-40382020-12-013810.1177/0263617420950994Effect of carbonization temperature on characterization and water vapor adsorption of coffee-shell activated carbonShengnan SunQiongfen YuMing LiHong ZhaoYunfeng WangXu JiCoffee shells, which are abundant in cellulose and lignin, are good raw materials to prepare activated carbon. In this paper, coffee shells were selected as raw materials for activated carbon preparation by KOH chemical activation. Influence of carbonization temperature on adsorption capacity of water vapor over activated carbon was researched. Thermogravimetric analysis was employed to select the scope of carbonization temperature. Activation energies of coffee shells pyrolyzed at different heating rates were calculated. Nitrogen adsorption/desorption isotherm and scanning electron microscopy (SEM) were adopted to characterize the activated carbon. And water vapor adsorption isotherms were simulated by the finite simplification model of Do-Do adsorption model. The results show that activation energies of coffee shells pyrolysis process with heating rates of 5, 10 and 20 K/min are 17.21, 18.01 and 57.52 kJ/mol, respectively. The optimal carbonization temperature of coffee shells is 923 K. The adsorption amount of water vapor can reach about 702.3 mg/g under experiment temperature of 298 K and relative humidity of 70%. The highest total pore volume and Brunauer–Emmett–Teller (BET) specific surface area are 1.41 cm 3 /g and 2817 m 2 /g, respectively. The simulation results of the finite simplification model are consistent well with water vapor adsorption experiment results. The results show that activated carbon prepared at the optimal condition would be the potential candidate for solar drying system.https://doi.org/10.1177/0263617420950994 |
| spellingShingle | Shengnan Sun Qiongfen Yu Ming Li Hong Zhao Yunfeng Wang Xu Ji Effect of carbonization temperature on characterization and water vapor adsorption of coffee-shell activated carbon Adsorption Science & Technology |
| title | Effect of carbonization temperature on characterization and water vapor adsorption of coffee-shell activated carbon |
| title_full | Effect of carbonization temperature on characterization and water vapor adsorption of coffee-shell activated carbon |
| title_fullStr | Effect of carbonization temperature on characterization and water vapor adsorption of coffee-shell activated carbon |
| title_full_unstemmed | Effect of carbonization temperature on characterization and water vapor adsorption of coffee-shell activated carbon |
| title_short | Effect of carbonization temperature on characterization and water vapor adsorption of coffee-shell activated carbon |
| title_sort | effect of carbonization temperature on characterization and water vapor adsorption of coffee shell activated carbon |
| url | https://doi.org/10.1177/0263617420950994 |
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