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CHEMICAL E 6214 DESIGN OF FIXED BED CATALYTIC REACTORS
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CHEMICAL E 6214 DESIGN OF FIXED BED CATALYTIC REACTORS 4.1 Defining the rate for catalytic reactions In solid catalyzed gaseous reactions, the rate can be defined in several ways: • A catalyst vol ... ume basis • A void volume (gas volume) basis • A catalyst mass basis • A catalyst surface area basis • A reactor volume basis Let us define the rate of formation the rate of formation ➢ can be expressed using mole balance either in the rate of disappearance of the reactants or the rate of the formation of the products Consider a system in which one stoichiometricaly simple reaction taking place, a rate of formation/ product and disappearance / can be Rdaetfienoefafso:rmation of product r =rate of formation of product " j"(moles " j" formed / time) j ▪ Rate of disappearance of reactant - r j =rate of disappearance of reactant " j" (moles " j" consumed / time) “Unit (something)”, we need to know where the reaction actually takes place (system's geometry) [Show More]
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