Activated carbon with high mesopore ratio derived from waste Zanthoxylum bungeanum branches by KNO3 assisted H3PO4 staged activation for toluene adsorption
发布时间：2024-11-29
点击次数：
- 影响因子：
- 5.8
- DOI码：
- 10.1007/s11356-023-29806-w
- 所属单位：
- 环境与资源学院
- 发表刊物：
- Environmental Science and Pollution Research
- 项目来源：
- 重庆市科技局
- 关键字：
- Waste biomass；Activation pore-forming；Toluene；Adsorption removal；Renewable performance
- 摘要：
- Waste Zanthoxylum bungeanum branches were used to prepare activated carbon adsorbents with high mesopore ratio byH3PO4 staged activation method with adding KNO3 additive. The prepared activated carbon adsorbents were characterized by SEM, BET, FT-IR, and XRD. The adsorption properties of the prepared activated carbon adsorbents were evaluated by the toluene adsorption/desorption in air. The quasi-frst-order, quasi-second-order, and Bangham models were used to fit the obtained toluene adsorption results. The oxidative etching of KNO3 additive improved the pore-forming ability of the H3PO4activator to enhance the activation pore-forming effects of the selected biomass raw material. The secondary pore-forming effects of K atoms promoted the effective expansion of the pore diameter in the activated carbon preparation process to prepare activated carbon adsorbents with high mesopore proportion. The specific surface area and mesopore proportion of the activated carbon adsorbents prepared by adding KNO3 additive exceeded 1100 m2/g and 71.00%, respectively, and the toluene adsorption capacity exceeded 370.00 mg/g. The rich mesopore structures can effectively reduce the toluene mass transfer resistance, which can promote the corresponding activated carbon adsorbent to be regenerated by low-temperature(40 °C) thermal desorption. The toluene adsorption on the prepared activated carbon adsorbents includes surface adsorption and diffusion in pore structures, and the toluene adsorption mechanism is more consistent with the Bangham kinetic model.
- 第一作者：
- Hongmei Xie
- 合写作者：
- Na Liu,Haoyu Wang,Shuang Chen,Jia Zeng
- 论文类型：
- 源刊论文
- 通讯作者：
- Guilin Zhou
- 学科门类：
- 工学
- 文献类型：
- Journal Article
- 卷号：
- 30
- 页面范围：
- 104194–104208
- 是否译文：
- 否
- 发表时间：
- 2023-12-01
- 收录刊物：
- SCI