SUPERCRITICAL FLUID DESORPTION FROM ACTIVATED CARBON

被引：78

作者：

SRINIVASAN, MP ^{[1
]}

SMITH, JM ^{[1
]}

MCCOY, BJ ^{[1
]}

机构：

[1] UNIV CALIF DAVIS,DEPT CHEM ENGN,DAVIS,CA 95616

来源：

CHEMICAL ENGINEERING SCIENCE | 1990年 / 45卷 / 07期

基金：

美国国家科学基金会;

关键词：

Adsorbents - Carbonaceous - Adsorption - Thermodynamics - Carbon - Carbon Dioxide - Mathematical Techniques - Correlation Methods;

D O I：

10.1016/0009-2509(90)87064-Y

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Experimental data and mathematical models are presented for desorption of ethyl acetate from activated carbon with supercritical carbon dioxide as solvent. The effluent concentration was monitored continuously with a flame ionization detector (FID). With a well-mixed reactor model for the bed of small thickness, desorption was studied as a function of flow rate, pressure, temperature and particle size. External mass transfer resistance was apparent at very low flow rates. From studies on the effect of temperature at different pressures, a cross-over effect was observed, similar to that for solubility in supercritical solvents. Intraparticle diffusion resistance was found to be significant for the largest particle size studied (dia. = 3.15 mm). A first-order, reversible adsorption model successfully fitted the experimental data. The energies of activation and heats of adsorption were obtained from the optimized adsorption rates and equilibrium constants. © 1990.

引用

页码：1885 / 1895

页数：11

共 18 条

[1]

BRUNNER G, 1985, SUPERCRITICAL FLUID, P245

[2] ANALYSIS OF RETROGRADE BEHAVIOR AND THE CROSSOVER EFFECT IN SUPERCRITICAL FLUIDS [J].