کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
158414 457007 2007 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Mathematical simulation of mass transfer processes under heterogeneous reactions in polydisperse porous media
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Mathematical simulation of mass transfer processes under heterogeneous reactions in polydisperse porous media
چکیده انگلیسی
Submitted is a theoretical study of mass transfer processes in polydisperse porous media in the presence of chemical reactions. Kinetic regime of methane pyrolysis in a porous carbon skeleton considering external and internal diffusion resistances for different initial distributions of particles forming the porous medium is investigated. Derived is a general analytical expression describing the influence of the inner reaction surface variation on the degree of the pore filling for an arbitrary initial particle size distribution. Expressions defining the time of pores filling by pyrocarbon based on approximate and exact solutions of the equation for the probability density function (PDF) of particle size distribution are received. Dependence of pore filling time on effective diffusion coefficient and initial particle size distribution using both solutions for PDF-equation is compared. It is shown, that the dominant factor influencing the pore filling time is the dispersion of particle size distribution.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Science - Volume 62, Issue 5, March 2007, Pages 1388-1394
نویسندگان
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