BREAKTHROUGH CURVES FOR SINGLE SOLUTES IN BEDS OF ACTIVATED CARBON WITH A BROAD PORE-SIZE DISTRIBUTION .2. MEASURING AND CALCULATING BREAKTHROUGH CURVES OF PHENOL AND INDOLE FROM AQUEOUS-SOLUTIONS ON ACTIVATED CARBONS

被引:19
作者
RESCHKE, G
RADEKE, KH
GELBIN, D
机构
[1] Acad of Sciences of the GDR, Central, Inst of Physical Chemistry, Berlin,, East Ger, Acad of Sciences of the GDR, Central Inst of Physical Chemistry, Berlin, East Ger
关键词
ADSORPTION - Measurements - CARBON - Activated - DIFFUSION - Measurements - MATHEMATICAL MODELS;
D O I
10.1016/0009-2509(86)87037-3
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
The breakthrough curves of phenol and indole from aqueous solutions on four activated carbons have been measured under a range of experimental conditions. We obtained a break-time ranking of the carbons coinciding with the equilibrium capacities. The breakthrough curves are simulated using the two-zone surface diffusion model, and it is found that the measurements can be modelled applying the adsorption capacity values from equilibrium measurements if empty bed contact times exceed 4 min. The kinetic parameters estimated by curve-fitting are influenced by particle crushing, thus indicating the importance of macropore diffusion resistance. The two-zone model was necessary to describe diffusion in biporous active carbons, whereas in the case of a carbon with a narrow pore-size distribution a monopore model was sufficient for breakthrough curve simulation.
引用
收藏
页码:549 / 554
页数:6
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