Phung Thi Lan, Vu Tran The Hien, Phan Đinh Khanh Nguyen, Le Minh Cam
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引用次数: 0
摘要
在氮气环境中使用热解法从香蕉皮中合成生物炭。热解温度范围为 100°C 至 500°C，加热速度为每分钟 5°C，热解时间为 1.5 小时。热解温度对生物炭表面酸碱性质的影响是通过特征 SEM 和 BET 测量来评估的。波姆滴定显示，随着热解温度的升高，总酸官能团逐渐减少，总碱官能团逐渐增加。用亚甲蓝（MB）作为模型物质来研究合成生物炭的吸附特性。采用 Langmuir 和 Freundlich 模型来描述吸附平衡。甲基溴的吸附动力学遵循伪二阶动力学方程。生物炭对甲基溴的吸附能力受材料酸碱性质的影响，这表明热解温度也有影响。
Synthesis and application of biochar from agricultural by-products. Effect of pyrolysis temperature on the acid-base properties of biochar
Biochar was synthesized from banana peels using the pyrolysis method in a nitrogen gas environment. The pyrolysis temperature ranged from 100°C to 500°C with a heating rate of 5°C per minute and a pyrolysis time of 1.5 hours. The influence of the pyrolysis temperature on the acid-base properties of the biochar surface was evaluated through characteristic SEM and BET measurements. Boehm titration showed a gradual decrease in the total acid functional groups and an increase in the total base functional groups with the increasing pyrolysis temperature. Methylene Blue (MB) was used as a model substance to investigate the adsorption properties of the synthesized biochar. The Langmuir and Freundlich models were employed to describe the adsorption equilibrium. The kinetics of MB adsorption followed a pseudo-second-order kinetic equation. The adsorption capacity of MB by biological charcoal was influenced by the acid-base properties of the material, indicating the impact of the pyrolysis temperature.
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