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4908811 
Journal Article 
Adsorption and transfer properties for toluene and p-dichlorobenzene in dense CO2/silica gel packed bed system by moment method and time-domain analysis 
Yang, XN 
2003 
Yes 
Chinese Journal of Chemical Engineering
ISSN: 1004-9541 
11 
3 
280-288 
English 
WOS:000184023900008 
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 intraparticle 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. 
supercritical CO2; adsorption; chromatography; moment method; time-domain analysis