کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
152092 456487 2010 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Adsorption of complex phenolic compounds on active charcoal: Breakthrough curves
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Adsorption of complex phenolic compounds on active charcoal: Breakthrough curves
چکیده انگلیسی

The transient adsorption of catechol from aqueous solution (C0=5C0=5 kg/m3) on activated carbon in an upflow fixed-bed column at 293 K was studied. The critical time at which the early breakthrough of the maximum admissible concentration (Ccrit=0.3×10−3Ccrit=0.3×10−3 kg/m3) occurs is deduced from a Homogeneous Surface Diffusion Model (HSDM) that accounts for adsorption equilibrium and mass-transfer kinetics. The mass-transfer coefficient is measured using a thin bed adsorption method and a correlation is proposed to account for its dependence with the flow rate. The sensitivity of the model for the prediction of the critical time to the different parameters is discussed and it is found to be mostly dependant upon the mass-transfer coefficient KfKf and the adsorbant mean particle diameter dPdP. In addition, the critical time has been proved to increase with the adsorption capacity qmax⁡qmax⁡. The existence of an optimal flow of polluted effluent through the column to achieve the removal of the pollutant with the highest efficiency is observed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 158, Issue 2, 1 April 2010, Pages 213–219
نویسندگان
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