کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10263640 | 457135 | 2005 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of coke deposition on transport and sorption in FCC catalysts studied by temporal analysis of products
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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چکیده انگلیسی
An industrial FCC catalyst has been exposed in a MAT reactor to typical heavy fractions to obtain samples with different coke contents. These samples were investigated in the TAP reactor with toluene as probe molecule. A mathematical model has been developed that allows estimating diffusion coefficients in the meso- and micropores as well as the sorption parameters. Modeling of the TAP data provides insight into the deactivation mechanism due to coke deposition. At low coke content (<2.6wt%), the enthalpy for toluene adsorption drops rapidly with increasing coke content indicating preferential blocking of the strongest acid sites. At higher coke contents (>2.6wt%), blocking of the micropores occurs. The model describes the data adequately with physical meaningful parameters.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Science - Volume 60, Issue 4, February 2005, Pages 1007-1017
Journal: Chemical Engineering Science - Volume 60, Issue 4, February 2005, Pages 1007-1017
نویسندگان
Y. Schuurman, C. Delattre, I. Pitault, J.P. Reymond, M. Forissier,