北京大学学报自然科学版 ›› 2025, Vol. 61 ›› Issue (2): 335-342.DOI: 10.13209/j.0479-8023.2024.112

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竹基生物炭制备方法及其对苯吸附的影响研究

曾子弱, 李凯, 李晓康, 杨薪玉, 龚元均, 李原, 王飞, 宁平   

  1. 昆明理工大学环境科学与工程学院, 昆明 650500
  • 收稿日期:2024-06-24 修回日期:2024-08-06 出版日期:2025-03-20 发布日期:2025-03-20
  • 通讯作者: 李原, E-mail: liyuaninkm(at)126.com
  • 基金资助:
    云南省重大科技专项计划(202202AG050005)资助

Influence of Preparation Methods for Bamboo-Based Biochar on Its Benzene Adsorption Performance

ZENG Ziruo, LI Kai, LI Xiaokang, YANG Xinyu, GONG Yuanjun, LI Yuan, WANG Fei, NING Ping   

  1. Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500
  • Received:2024-06-24 Revised:2024-08-06 Online:2025-03-20 Published:2025-03-20
  • Contact: LI Yuan, E-mail: liyuaninkm(at)126.com

摘要:

以黄竹茎为原料, 分别通过高温热解法和水热炭化法制备热解炭BC-700和水热炭HBC-190/700, 并在55°C下进行苯吸附性能测试。结果显示, 水热炭HBC-190/700对苯的吸附效果是热解炭BC-700的3倍。进一步使用比表面积与孔隙度分析(BET)、X射线衍射(XRD)、扫描电子显微镜分析(SEM)、拉曼光谱分析(Raman)和傅里叶变换红外光谱分析(FT-IR)等表征手段, 探讨制备方法对吸附剂物理和化学性质的影响。SEM图像显示水热炭HBC-190/700表面有大量碳微球堆积, 形成缝隙孔。BET结果表明水热炭HBC-190/700呈现微孔和介孔的等级孔分布, 有利于苯的传质转移。此外, FT-IR结果表明, 水热炭HBC-190/700的芳香族官能团是苯吸附的关键因素。

关键词: 苯蒸气, 生物炭, 多孔碳微球, 吸附

Abstract:

Using the stems of Dendrocalamus membranaceus Munro as raw materials, pyrolysis char BC-700 and hydrochar HBC-190/700 were prepared by the high-temperature pyrolysis method and the hydrothermal roasting method, respectively. Then, their benzene adsorption performance was evaluated at 55°C. The results showed that the adsorption effect of biochar HBC-190/700 on benzene was three times that of BC-700. Furthermore, the influence of preparation methods on the physical and chemical properties of the adsorbents was investigated using characterization techniques such as BET, XRD, SEM, Raman and FT-IR. SEM results indicated that many carbon microspheres were accumulated on the surface of hydrothermal carbon HBC-190/700, resulting in the formation of crevice pores. BET analysis showed that the hydrothermal carbon HBC-190/700 presented a hierarchical pore distribution of micropores and mesopores, which was conducive to the mass transfer of benzene. In addition, FT-IR analysis revealed that the aromatic functional groups of HBC-190/700 were the key factors for benzene adsorption. 

Key words: benzene vapor, biochar, porous carbon microspheres, adsorption