| 基于矩法和时间域分析法研究稠密CO2中甲苯和对氯苯在硅胶固定床系统中的吸附和传递性质 |
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| 引用本文： | 杨晓宁. 基于矩法和时间域分析法研究稠密CO2中甲苯和对氯苯在硅胶固定床系统中的吸附和传递性质[J]. 中国化学工程学报, 2003, 11(3) |
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| 作者姓名： | 杨晓宁 |
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| 作者单位： | College of |
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| 基金项目： | Supported by research grant 02KJB530002 from Jiangsu Provincial Committee of Education. |
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| 摘 要： | Based on chromatographic theory, the moment method and the time-domain fitting analysis were applied to measure and evaluate the adsorption equilibrium constant and mass transfer properties (axial dispersion coefficient and effective intra-particle diffusivity) for toluene and p-dichlorobenzene on silica gel adsorbent in the subcritical and supercritical CO2. An apparatus based on supercritical fluid chromatography was established and the experiments were performed at temperatures of 298.15-318.15 K and pressures of 7.5-17.8 MPa. The two methods have been compared. The results show that for the systems studied here the moment method can give reasonable values for both adsorption equilibrium constant and mass transfer properties, but the time-domain analysis only can obtain the adsorption equilibrium constant. The dependence of adsorption equilibrium constant and mass transfer properties on temperature and pressure was investigated.
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Adsorption and Transfer Properties for Toluene and p-Dichlorobenzene in Dense CO2/Silica Gel Packed Bed System by Moment Method and Time-Domain Analysis |
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| YANG XiaoningCollege of Chemistry and Chemical Engineering,Nanjing University of Technology,Nanjing ,China. Adsorption and Transfer Properties for Toluene and p-Dichlorobenzene in Dense CO2/Silica Gel Packed Bed System by Moment Method and Time-Domain Analysis[J]. Chinese Journal of Chemical Engineering, 2003, 11(3) |
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| Authors: | YANG XiaoningCollege of Chemistry Chemical Engineering Nanjing University of Technology Nanjing China |
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| Affiliation: | College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing 210009, China |
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| Abstract: | Based on chromatographic theory, the moment method and the time-domain fitting analysis were applied to measure and evaluate the adsorption equilibrium constant and mass transfer properties (axial dispersion coefficient and effective intra-particle diffusivity) for toluene and p-dichlorobenzene on silica gel adsorbent in the subcritical and supercritical CO2. An apparatus based on supercritical fluid chromatography was established and the experiments were performed at temperatures of 298.15-318.15 K and pressures of 7.5-17.8 MPa. The two methods have been compared. The results show that for the systems studied here the moment method can give reasonable values for both adsorption equilibrium constant and mass transfer properties, but the time-domain analysis only can obtain the adsorption equilibrium constant. The dependence of adsorption equilibrium constant and mass transfer properties on temperature and pressure was investigated. |
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| Keywords: | supercritical CO2 adsorption chromatography moment method time-domain analysis |
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