The laminar flow tubular reactor with homogeneous and heterogeneous reactions(I.Integral Equations for Diverse Reaction Rate Regimes)

摘要

Design equations for non-isothermal Laminar Flow Tubular Reactors (LFTRs) with lomogeneous and heterogeneous -at the reactor wall -reactions with arbitrary kinetic equa- ions have been satisfactorily treated transforming the original P.D.E. problem into a system of ntegral equations. The kernels of the integral operators are related to an eigenvalue prob- em which does not depend on the kinetic equations; this avoids repetitive computational ~ffort in the treating of different reaction kinetics. To render a more efficient numerical treatment and according to the governing reaction rate egime, modified expressions of the general solution were obtained was follows: (i) a solution vith kernels depending only on the diffusion and convective times was obtained for a low reac- ion regime; (ii) another solution with kernels including the reaction time, besides the diffusion nd convective ones, was necessary for a fast reaction regime and (iii) the local quasi-steady- tate approximation was obtained as limiting case of solution (ii) for a instantaneous reaction regime.