**Modeling of the Dehydrogenation Reaction to produce Olefins for the Petrochemical Industry**

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M.S.H.Mohamed, M.SH.Hassan , H.A.Farag and Y.A, Eltawil

M.S.H.Mohamed, M.SH.Hassan , H.A.Farag and Y.A, Eltawil

Modeling of a heterogeneous industrial fixed bed reactor for selective dehydrogenation of heavy paraffin with Pt-Sn-Al2O3 catalyst (DEH-7 (UOP)) is the subject of current study. Using mass balance for appropriate element of reactor . In order to investigate reactor performance in time, the reactor model which is a set of partial differential equations (PDEs), ordinary differential equations and algebraic equations will be solved numerically. Variation of paraffin, olefin mole percent as a function of time and reactor radius is estimated by numerical solution of the mathematical model. And variation of temperature with reactor radius found by numerical solution of the mathematical model. Modeling results are compared with an industrial reactor data at different operating times.