کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
613673 880726 2006 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Kinetic estimation of the adsorbate distribution on the surface from adsorbed amounts
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Kinetic estimation of the adsorbate distribution on the surface from adsorbed amounts
چکیده انگلیسی

A phenomenological multilayer adsorption model for a well-dispersed, homogeneous, nonporous adsorbent and a molecular adsorbate is presented. The model provides explicit kinetic expressions associating the adsorbed amounts to the fraction of the surface occupied and reduces to the first- and second-order adsorption models for special cases. Parameters of the model are a pair of true rate constants related to the adsorbate–adsorbent and adsorbate–surface adsorbate affinities. A general graphical procedure and analytical equations for special cases are provided to estimate the rate constants from kinetic adsorption data. Data from the adsorption of sodium stearate onto α-alumina from water were used to test the model. The predicted values of the rate constants suggested that the stearate was distributed homogeneously on the alumina surface and essentially adsorbed as a monolayer before starting to form the second layer.

A phenomenological multilayer adsorption model for well-dispersed, homegeneous, nonporous adsorbent–molecular adsorbate system is proposed. It provides explicit kinetic expressions associating the adsorbed amounts to fractional surface coverage.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Colloid and Interface Science - Volume 298, Issue 2, 15 June 2006, Pages 593–601
نویسندگان
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