Optimization of the synthesis conditions of zeolite adsorbents derived from coal fly ash and study on their adsorption performance on benzene
Zeolite adsorbents were synthesized through an alkali fusion-hydrothermal process, using coal fly ash as a raw material. Firstly, the coal fly ash was mixed with sodium hydroxide at a mass ratio of 1∶1.2 and then roasted at 850 ℃ for 2 h to obtain the alkali-fused ash. The effects of the Si/Al molar...
Saved in:
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Energy Environmental Protection
2024-12-01
|
| Series: | 能源环境保护 |
| Subjects: | |
| Online Access: | https://doi.org/10.20078/j.eep.20240701 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850109130686070784 |
|---|---|
| author | Zhuo CHEN Zhiming ZHANG Lianzheng GUI Ke SUN Huabo DUAN Jingping HU Sha LIANG Jiakuan YANG |
| author_facet | Zhuo CHEN Zhiming ZHANG Lianzheng GUI Ke SUN Huabo DUAN Jingping HU Sha LIANG Jiakuan YANG |
| author_sort | Zhuo CHEN |
| collection | DOAJ |
| description | Zeolite adsorbents were synthesized through an alkali fusion-hydrothermal process, using coal fly ash as a raw material. Firstly, the coal fly ash was mixed with sodium hydroxide at a mass ratio of 1∶1.2 and then roasted at 850 ℃ for 2 h to obtain the alkali-fused ash. The effects of the Si/Al molar ratio of the precursor, reaction time, temperature, and liquid/solid ratio on the structure of the zeolite adsorbents derived from coal fly ash were investigated through single-factor experiments conducted during the hydrothermal reaction. The synthesized zeolite adsorbents derived from coal fly ash were systematically characterized using X-ray diffractometer (XRD), scanning electron microscope (SEM) and specific surface area and pore size analyzer (BET). Under the optimized conditions of a Si/Al molar ratio of the precursor set at 1.5, a reaction time of 16 h, a reaction temperature of 70 ℃, and a liquid/solid ratio of 8 mL/g in hydrothermal reaction, the relative mass fraction of type X zeolite in the synthesized product was 96.3%, the specific surface area was 489.9 m2/g, and the pore volume was 0.28 cm3/g. Subsequently, the gas adsorption performance of benzene, a typical volatile organic compound, by zeolite adsorbent derived from coal fly ash was investigated and compared with commercial activated carbon. The results showed that at an initial pollutant concentration of 800 μg/L, an adsorption temperature of 100 ℃, a gas flow rate of 200 mL/min, and an adsorbent loading of 0.1 g, the zeolite adsorbents derived from coal fly ash exhibited a saturated adsorption capacity of benzene at 41.5 mg/g, which was higher compared to commercial activated carbon (31.3 mg/g). This study provides a reference for the resource utilization of coal fly ash. |
| format | Article |
| id | doaj-art-1e7e1082d61645cd89b9510e28f0223b |
| institution | OA Journals |
| issn | 2097-4183 |
| language | zho |
| publishDate | 2024-12-01 |
| publisher | Editorial Office of Energy Environmental Protection |
| record_format | Article |
| series | 能源环境保护 |
| spelling | doaj-art-1e7e1082d61645cd89b9510e28f0223b2025-08-20T02:38:10ZzhoEditorial Office of Energy Environmental Protection能源环境保护2097-41832024-12-0138613915010.20078/j.eep.202407012024-6-liangshaOptimization of the synthesis conditions of zeolite adsorbents derived from coal fly ash and study on their adsorption performance on benzeneZhuo CHEN0Zhiming ZHANG1Lianzheng GUI2Ke SUN3Huabo DUAN4Jingping HU5Sha LIANG6Jiakuan YANG7Hubei Key Laboratory of Multi-media Pollution Cooperative Control in Yangtze Basin, School of Environmental Science & Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, ChinaHubei Key Laboratory of Multi-media Pollution Cooperative Control in Yangtze Basin, School of Environmental Science & Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, ChinaHubei Key Laboratory of Multi-media Pollution Cooperative Control in Yangtze Basin, School of Environmental Science & Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, ChinaZhejiang Zheneng Technology & Environment Group Co., Ltd., Hangzhou 310007, ChinaHubei Key Laboratory of Multi-media Pollution Cooperative Control in Yangtze Basin, School of Environmental Science & Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, ChinaHubei Key Laboratory of Multi-media Pollution Cooperative Control in Yangtze Basin, School of Environmental Science & Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, ChinaHubei Key Laboratory of Multi-media Pollution Cooperative Control in Yangtze Basin, School of Environmental Science & Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, ChinaHubei Key Laboratory of Multi-media Pollution Cooperative Control in Yangtze Basin, School of Environmental Science & Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, ChinaZeolite adsorbents were synthesized through an alkali fusion-hydrothermal process, using coal fly ash as a raw material. Firstly, the coal fly ash was mixed with sodium hydroxide at a mass ratio of 1∶1.2 and then roasted at 850 ℃ for 2 h to obtain the alkali-fused ash. The effects of the Si/Al molar ratio of the precursor, reaction time, temperature, and liquid/solid ratio on the structure of the zeolite adsorbents derived from coal fly ash were investigated through single-factor experiments conducted during the hydrothermal reaction. The synthesized zeolite adsorbents derived from coal fly ash were systematically characterized using X-ray diffractometer (XRD), scanning electron microscope (SEM) and specific surface area and pore size analyzer (BET). Under the optimized conditions of a Si/Al molar ratio of the precursor set at 1.5, a reaction time of 16 h, a reaction temperature of 70 ℃, and a liquid/solid ratio of 8 mL/g in hydrothermal reaction, the relative mass fraction of type X zeolite in the synthesized product was 96.3%, the specific surface area was 489.9 m2/g, and the pore volume was 0.28 cm3/g. Subsequently, the gas adsorption performance of benzene, a typical volatile organic compound, by zeolite adsorbent derived from coal fly ash was investigated and compared with commercial activated carbon. The results showed that at an initial pollutant concentration of 800 μg/L, an adsorption temperature of 100 ℃, a gas flow rate of 200 mL/min, and an adsorbent loading of 0.1 g, the zeolite adsorbents derived from coal fly ash exhibited a saturated adsorption capacity of benzene at 41.5 mg/g, which was higher compared to commercial activated carbon (31.3 mg/g). This study provides a reference for the resource utilization of coal fly ash.https://doi.org/10.20078/j.eep.20240701coal fly ashzeolitehydrothermal processsynthesis mechanismbenzene adsorption |
| spellingShingle | Zhuo CHEN Zhiming ZHANG Lianzheng GUI Ke SUN Huabo DUAN Jingping HU Sha LIANG Jiakuan YANG Optimization of the synthesis conditions of zeolite adsorbents derived from coal fly ash and study on their adsorption performance on benzene 能源环境保护 coal fly ash zeolite hydrothermal process synthesis mechanism benzene adsorption |
| title | Optimization of the synthesis conditions of zeolite adsorbents derived from coal fly ash and study on their adsorption performance on benzene |
| title_full | Optimization of the synthesis conditions of zeolite adsorbents derived from coal fly ash and study on their adsorption performance on benzene |
| title_fullStr | Optimization of the synthesis conditions of zeolite adsorbents derived from coal fly ash and study on their adsorption performance on benzene |
| title_full_unstemmed | Optimization of the synthesis conditions of zeolite adsorbents derived from coal fly ash and study on their adsorption performance on benzene |
| title_short | Optimization of the synthesis conditions of zeolite adsorbents derived from coal fly ash and study on their adsorption performance on benzene |
| title_sort | optimization of the synthesis conditions of zeolite adsorbents derived from coal fly ash and study on their adsorption performance on benzene |
| topic | coal fly ash zeolite hydrothermal process synthesis mechanism benzene adsorption |
| url | https://doi.org/10.20078/j.eep.20240701 |
| work_keys_str_mv | AT zhuochen optimizationofthesynthesisconditionsofzeoliteadsorbentsderivedfromcoalflyashandstudyontheiradsorptionperformanceonbenzene AT zhimingzhang optimizationofthesynthesisconditionsofzeoliteadsorbentsderivedfromcoalflyashandstudyontheiradsorptionperformanceonbenzene AT lianzhenggui optimizationofthesynthesisconditionsofzeoliteadsorbentsderivedfromcoalflyashandstudyontheiradsorptionperformanceonbenzene AT kesun optimizationofthesynthesisconditionsofzeoliteadsorbentsderivedfromcoalflyashandstudyontheiradsorptionperformanceonbenzene AT huaboduan optimizationofthesynthesisconditionsofzeoliteadsorbentsderivedfromcoalflyashandstudyontheiradsorptionperformanceonbenzene AT jingpinghu optimizationofthesynthesisconditionsofzeoliteadsorbentsderivedfromcoalflyashandstudyontheiradsorptionperformanceonbenzene AT shaliang optimizationofthesynthesisconditionsofzeoliteadsorbentsderivedfromcoalflyashandstudyontheiradsorptionperformanceonbenzene AT jiakuanyang optimizationofthesynthesisconditionsofzeoliteadsorbentsderivedfromcoalflyashandstudyontheiradsorptionperformanceonbenzene |