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Consecutive chemical reactions in a turbular reactor with turbulent flow
Authors:S. H. Lin
Affiliation:(1) Department of Chemical Engineering, Kansas State University, Manhattan, Kansas, USA
Abstract:Homogeneous consecutive chemical reactions in turbulent flow system is analyzed in this paper. Arbitrary chemical reaction order is considered. The governing nonlinear material balance equations are solved numerically on a digital computer. It is seen from the preliminary numerical results that high Reynolds and Schmidt numbers significantly increase both reaction velocities.Nomenclature ci concentration of i species, g. mole/cm3 - Ci dimensionless concentration of i species, ci/cA0 - cA0 inlet concentration of A, g. mole/cm3 - Di molecular diffusivity of i species, cm2/sec. - f Fanning friction factor - k1 first reaction rate coefficient, (g. mole/cm3)1–m/sec. - k2 second reaction rate coefficient, (g. mole/cm3)1–n/sec. - K1 dimensionless first reaction rate coefficient, k1r02cA0–1/DA - K2 dimensionless second reaction rate coefficient, k2r02cA0–1/DA - m order of the first chemical reaction - n order of the second chemical reaction - r radial distance, cm - r0 reactor radius, cm - R dimensionless radial distance, r/r0 - Re Reynolds number, r0umacr/ngr - Sc Schmidt number, D/ngr - u local velocity, cm - umacr bulk velocity, cm - U dimensionless local velocity, u/umacr - X, Y dimensionless concentrations of A and B, ci/cA0 - xxx0058;, xxx0059; dimensionless bulk concentrations of A and B - z axial distance, cm - Z dimensionless axial distance, zDA/r02umacr - agr ratio of eddy mass diffusivity to eddy viscosity, epsi/ngr - epsi eddy mass diffusivity, cm2/sec. - ngr kinematic viscosity, cm2/sec.
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