| 多孔活性炭孔径分布的表征 |
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| 引用本文： | 张超,高才,鲁雪生,顾安忠.多孔活性炭孔径分布的表征[J].离子交换与吸附,2006,22(2):187-192. |
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| 作者姓名： | 张超 高才 鲁雪生 顾安忠 |
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| 作者单位： | 1. 中原工学院能源与环境工程系,郑州,450007
2. 上海交通大学低温与制冷研究所,上海,200030 |
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| 摘 要： | 总结了利用气体吸附法表征多孔活性炭中孔和微孔孔径分布的各种方法。BJH方法和MP模型忽略了微孔内势能叠加效应,仅适合描述中孔孔径分布;HK模型和以Dubinin填充理论为基础的各种方法,考虑了微观下势能叠加的效果,在一定程度上能很好地描述微孔孔径分布;最近围绕GAI(GeneralizedAdsorptionIsotherm)而展开的利用密度范函理论(DFT,densityfunctiontheory)和巨正则系综蒙特卡罗(GCMC,grandcanonicalensemblemontecarlo)模拟确定微孔孔径分布的方法较好地克服了Dubinin理论中存在的缺点,是较好的两种方法,但其有效性还需要更多的实验结果来证明。
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| 关 键 词： | 多孔介质 气体吸附法 吸附等温线 孔径分布 |
| 文章编号： | 1001-5493(2006)01-0187-06 |
| 收稿时间： | 2005-05-08 |
| 修稿时间： | 2005年5月8日 |
CHARACTERIZATION OF PORE SIZE DISTRIBUTION OF POROUS ACTIVATED CARBONS |
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| ZHANG Chao,GAO Cai,LU Xuesheng,GU Anzhong.CHARACTERIZATION OF PORE SIZE DISTRIBUTION OF POROUS ACTIVATED CARBONS[J].Ion Exchange and Adsorption,2006,22(2):187-192. |
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| Authors: | ZHANG Chao GAO Cai LU Xuesheng GU Anzhong |
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| Institution: | 1 Department of Energy and Environment Engineering, Zhongyuan University of Technology, Zhengzhou 450007, China;2 Institute of Refrigeration and Cryogenics Engineering, Shanghai Jiaotong University, Shanghai 200030, China |
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| Abstract: | Various methods based on gas adsorption to characterize pore size distribution of both micropores and mespores of porous activated carbons were summarized.Both the BJH method and the MP model do not consider the enhancement of adsorption potential in micropores,so they are only suitable to characterize the pore size distribution of mespores.However the HK model and Dubinin micropore filling theory-based methods consider the enhancement of adsorption potential in micropores,and can describe the pore size distribution of micropores to some degree.Recently the density function theory and the Monte Carlo method for a grand canonical ensemble,which are developed around general adsorption isotherms(GAI),are used to determine the pore size distribution of micropores.The two methods get over the shortcomings of Dubinin micropore filling theory,and are regarded as the most promising methods.However their validity must be proven by more experimental results. |
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| Keywords: | Porous medium Gas adsorption method Adsorption isotherm Pore size distribution |
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