کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
152201 456491 2009 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Initial behavior of intraparticle diffusion model used in the description of adsorption kinetics
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Initial behavior of intraparticle diffusion model used in the description of adsorption kinetics
چکیده انگلیسی

The intraparticle diffusion model (IPD) proposed by Weber and Morris has been widely applied for the analysis of adsorption kinetics. In this work, the characteristic curves based on this model were plotted with various initial adsorption factors (Ri). Four zones of the initial adsorption according to Ri value from 0 to 1 were classified; that is, approaching completely initial adsorption (zone 4), strongly initial adsorption (zone 3), intermediately initial adsorption (zone 2), and weakly initial adsorption (zone 1). Activated carbons with micropore volume fraction of 0.537 and 0.686 were prepared from oil-palm shells by steam activation. Based on the standard deviations, the kinetics of the adsorption of tannic acid (TA), methylene blue (MB), phenol, and 4-chlorophenol (4-CP) on activated carbons could be best described by intraparticle diffusion model. The initial adsorption of TA and MB belonged to zone 2, and that of phenol and 4-CP mostly belonged to zone 3. Nearly 80% of the 86 adsorption systems surveyed belonged to zones 2 and 3, indicating that the Ri value was smaller when the carbon with smaller particle and steam-activated carbon was used.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 153, Issues 1–3, 1 November 2009, Pages 1–8
نویسندگان
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