کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
626774 1455450 2009 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Mass transport through anisotropic membrane layer
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Mass transport through anisotropic membrane layer
چکیده انگلیسی

Concentration and/or space-dependent diffusive and convective mass transport, through flat sheet, anisotropic membrane layer or membrane bioreactor through dense or porous membrane, were investigated. A quasi-analytical solution is presented in order to estimate the concentration distribution in the membrane layer and the inlet and outlet mass transfer rates. These properties have been given in closed, explicit, mathematical forms which make the calculation process very simple. The effect of the varying convective permeation velocity and that of the varying diffusion coefficient as well as the effect of the (varying) reaction rate was investigated including these parameters in the Peclet (Pe) number and in the Ha number. The diffusion coefficient can vary with the concentration and/or space coordinate, while the convective velocity can vary with the space-coordinate. Similarly, the biochemical or chemical reaction rate can also change with the space-coordinate. It was shown that the change of the Pe number can have strong effect on the mass transport process; thus its effect must not be neglected. The model developed can be applied by any mathematical function of the variation of the mass transport parameters.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Desalination - Volume 240, Issues 1–3, 15 May 2009, Pages 54-63