Lignin-impregnated biochar assisted with microwave irradiation for CO2 capture: adsorption performance and mechanism
Abstract Bamboo biochar was modified by lignin impregnation and microwave irradiation to enhance its performance for CO2 capture. The pore structure of lignin-impregnated biochar was significantly affected by the impregnation ratio. The maximum specific surface area of 377.32 m2 g−1 and micropore vo...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Springer
2024-03-01
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| Series: | Biochar |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/s42773-024-00310-9 |
| _version_ | 1797266654703386624 |
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| author | Xueyang Zhang Haoliang Xu Wei Xiang Xinxiu You Huantao Dai Bin Gao |
| author_facet | Xueyang Zhang Haoliang Xu Wei Xiang Xinxiu You Huantao Dai Bin Gao |
| author_sort | Xueyang Zhang |
| collection | DOAJ |
| description | Abstract Bamboo biochar was modified by lignin impregnation and microwave irradiation to enhance its performance for CO2 capture. The pore structure of lignin-impregnated biochar was significantly affected by the impregnation ratio. The maximum specific surface area of 377.32 m2 g−1 and micropore volume of 0.163 cm3 g−1 were observed on the biochar with an impregnation ratio of 1:20 (mass ratio of lignin to biochar). Lignin impregnation increased the CO2 adsorption capacity of biochar up to 134.46 mg g−1. Correlation analysis confirmed the crucial role of biochar’s pore structure in adsorption. The Avrami model fitted the CO2 capture curves well. The calculation of adsorption activation energy suggested that the adsorption process was dominated by physical mechanism assisted with partial chemical mechanism. Meanwhile, Langmuir isotherm analysis indicated that lignin impregnation transformed the larger pores of biochar into more uniform micropores, thereby making the adsorption process closer to monolayer adsorption. Both the high reusability (89.79–99.06%) after 10 successive cycles and the excellent CO2 selectivity in competitive adsorption confirmed that lignin-impregnated biochar is an outstanding adsorbent for CO2 capture. Graphical Abstract |
| first_indexed | 2024-04-25T01:04:08Z |
| format | Article |
| id | doaj.art-b1ede15812464a15a256e077a804d4f7 |
| institution | Directory Open Access Journal |
| issn | 2524-7867 |
| language | English |
| last_indexed | 2024-04-25T01:04:08Z |
| publishDate | 2024-03-01 |
| publisher | Springer |
| record_format | Article |
| series | Biochar |
| spelling | doaj.art-b1ede15812464a15a256e077a804d4f72024-03-10T12:18:48ZengSpringerBiochar2524-78672024-03-016111410.1007/s42773-024-00310-9Lignin-impregnated biochar assisted with microwave irradiation for CO2 capture: adsorption performance and mechanismXueyang Zhang0Haoliang Xu1Wei Xiang2Xinxiu You3Huantao Dai4Bin Gao5School of Environmental Engineering, Xuzhou University of TechnologySchool of Environmental Engineering, Xuzhou University of TechnologySchool of Environmental Engineering, Xuzhou University of TechnologySchool of Environmental Engineering, Xuzhou University of TechnologySchool of Environmental Engineering, Xuzhou University of TechnologyDepartment of Civil and Environmental Engineering, Rensselaer Polytechnic InstituteAbstract Bamboo biochar was modified by lignin impregnation and microwave irradiation to enhance its performance for CO2 capture. The pore structure of lignin-impregnated biochar was significantly affected by the impregnation ratio. The maximum specific surface area of 377.32 m2 g−1 and micropore volume of 0.163 cm3 g−1 were observed on the biochar with an impregnation ratio of 1:20 (mass ratio of lignin to biochar). Lignin impregnation increased the CO2 adsorption capacity of biochar up to 134.46 mg g−1. Correlation analysis confirmed the crucial role of biochar’s pore structure in adsorption. The Avrami model fitted the CO2 capture curves well. The calculation of adsorption activation energy suggested that the adsorption process was dominated by physical mechanism assisted with partial chemical mechanism. Meanwhile, Langmuir isotherm analysis indicated that lignin impregnation transformed the larger pores of biochar into more uniform micropores, thereby making the adsorption process closer to monolayer adsorption. Both the high reusability (89.79–99.06%) after 10 successive cycles and the excellent CO2 selectivity in competitive adsorption confirmed that lignin-impregnated biochar is an outstanding adsorbent for CO2 capture. Graphical Abstracthttps://doi.org/10.1007/s42773-024-00310-9BiocharLignin impregnationMicrowave irradiationCO2 capture |
| spellingShingle | Xueyang Zhang Haoliang Xu Wei Xiang Xinxiu You Huantao Dai Bin Gao Lignin-impregnated biochar assisted with microwave irradiation for CO2 capture: adsorption performance and mechanism Biochar Biochar Lignin impregnation Microwave irradiation CO2 capture |
| title | Lignin-impregnated biochar assisted with microwave irradiation for CO2 capture: adsorption performance and mechanism |
| title_full | Lignin-impregnated biochar assisted with microwave irradiation for CO2 capture: adsorption performance and mechanism |
| title_fullStr | Lignin-impregnated biochar assisted with microwave irradiation for CO2 capture: adsorption performance and mechanism |
| title_full_unstemmed | Lignin-impregnated biochar assisted with microwave irradiation for CO2 capture: adsorption performance and mechanism |
| title_short | Lignin-impregnated biochar assisted with microwave irradiation for CO2 capture: adsorption performance and mechanism |
| title_sort | lignin impregnated biochar assisted with microwave irradiation for co2 capture adsorption performance and mechanism |
| topic | Biochar Lignin impregnation Microwave irradiation CO2 capture |
| url | https://doi.org/10.1007/s42773-024-00310-9 |
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