高等学校化学学报

高等学校化学学报

• 研究论文 • 上一篇    下一篇

活性炭的高温脱氧改性及其床层对全氟异丁烯的吸附动力学研究

叶平伟1,2, 栾志强2, 张敬畅1, 张忠良2, 李凯2, 李岩2, 马兰2, 曹维良1   

    1. 北京化工大学理学院, 北京100029;
    2. 北京防化研究院, 北京100083
  • 收稿日期:2007-10-22 修回日期:1900-01-01 出版日期:2008-05-10 发布日期:2008-05-10
  • 通讯作者: 张敬畅, 栾志强

High Temperature Modification on Activated Carbons and Adsorption Kinetics of Perfluoroisobutene(PFIB) on Carbon Bed

YE Ping-Wei1,2, LUAN Zhi-Qiang2*, ZHANG Jing-Chang1*, ZHANG Zhong-Liang2, LI Kai2, LI Yan2, MA Lan2, CAO Wei-Liang1   

    1. School of Science, Beijing University of Chemical Technology, Beijing 100029, China;
    2. Research Institute of Chemical Defense, Beijing 100083, China
  • Received:2007-10-22 Revised:1900-01-01 Online:2008-05-10 Published:2008-05-10
  • Contact: ZHANG Jing-Chang, LUAN Zhi-Qiang

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摘要： 在N2气保护下对颗粒状活性炭进行了不同温度(400—800 ℃)下的高温改性, 考察了不同的空气流湿度(30%—80% R.H.)下全氟异丁烯(PFIB)在活性炭床层中的吸附穿透行为. 利用Wheeler方程对穿透数据进行了处理, 并采用线性平衡吸附体系的动力学模型对床层的穿透实验数据进行了关联. 结果表明, 基炭经高温改性后, 活性炭的孔隙结构没有明显变化, 表面含氧量随处理温度的提高而减少, 在高湿条件下对全氟异丁烯的选择性吸附能力显著提高, 活性炭床层可使PFIB的防护时间延长. 各种实验条件下的理论穿透曲线与实验值数据吻合, 可以利用线性平衡吸附体系的动力学模型来预示PFIB在活性炭层中的穿透行为, 进行防毒面具的滤毒罐参数的选取和设计.

关键词: 活性炭, 全氟异丁烯, 高温改性, 吸附, 穿透曲线

Abstract: The high temperature modifications(400—800 ℃) were carried out on granular activated carbons in the N2 flow and the adsorption behavior of PFIB on the carbon bed under various airflow humidity were studied. The breakthrough curves were processed through Wheeler equation and the dynamic model based on the linear equilibrium was used to correlate the experimental data. The results show that the pore structure didn’t change obviously and the surface oxygen amount decreased with the increase of modification temperature; the selective adsorption capacities to PFIB increased greatly and the carbon bed’s effective protection time to PFIB prolonged under high humidity of airflow. The theoretical breakthrough curves are in agreement with the experimental data very well, and this dynamic model can be used to predict the breakthrough behavior and to design and select the parameters of the cartridge canister.

Key words: Activated carbon, Perfluoroisobutene(PFIB), High temperature modification, Adsorption, Breakthrough curve

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