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Elements of Chemical Reaction ering 4th Ed - H. Scott Fogler 46

Elements of Chemical Reaction ering 4th Ed - H. Scott Fogler 46

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14 Mole Balances Chap. 1 in which there are no spatial variations in the rate of reaction (i.e., perfect mixing), it takes rhe familiar form known as the design eqrrarion for a CSTR: F~~ Al The CSTR design equation gives the reactor volume I{ necessary to reduce the entering flow rate of species j, from Fj, to the exit flow rate F,, when species j i s disappearing at a rate of -rj. We note that the CSTR is modeled such that the conditions in the exit stream (e.g.. concentration, temperature) are iden- tical to those in the tank. The molar flow rate 6 is just the product of the con- centralion of species j and the volumetric flow rate u : Fl = Cj+ v p & - moles volume time volume time I Consequently. we could combine Equations (1-7) and ( 1-8) to write a bal- ance on species A as 1.4.2 Tubular Reactor In addition 10 the CSTR and batch reactors, another type of reactor commonly used in industry is the ruhlliar rmr.ror: It consists of a cylindrical pipe and is When
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