Mathematical modeling of dehydration of THF+water in a fixed bed column

سال انتشار: 1388
محل انتشار: ششمین کنگره بین المللی مهندسی شیمی
کد COI اختصاصی: ICHEC06_186
زبان مقاله: انگلیسی
تعداد مشاهده: 1758

نویسندگان

Department of Chemical and Petroleum Engineering, Sharif University of Technology,

چکیده

The adsorption of tetrahydrofuran (THF) + water mixture on zeolite molecular sieves was carried out using a fixed-bed column. A pore diffusion model (PDM) was proposed to predict the adsorption breakthrough curves in a fixed bed with respect to initial concentrations and feed flow rates. The equilibrium behavior was shown to fit a Langmuir isotherm. A mathematical modeling for the adsorption process is developed and illustrated for THF- water mixture. The model deals with the effect of axial dispersion and inter- and intraparticle mass-transfer resistances at isothermal operating conditions. Four types of molecular sieves (3A, 4A, 5A, and 13X) were used. Orthogonal collocation was used to solvethe coupled non-linear parabolic partial differential equations for simultaneous adsorption, which include the effects of axial diffusion in the fluid, the film resistance, and internal diffusional resistance of particles. Felberg’s Runge-Kutta methods were used to solve the dimensionless 4N-coupled ordinary differential equations. Moreover, the influences of the bed Reynolds number, Peclet number, and the diameter of the spherical molecular sieves on the breakthrough curve were investigated.

کلیدواژه ها

Molecular sieves; Adsorption; Isotherms; Pore Diffusion model; Orthogonal Collocation

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