integrate eq 20 and 21 from eq 17

V FAO T dXA -TA CAO 0 or any ea (17) V VCAO = Cao ) T=-= (*ydXA VO FA -ra Equation 17 allows the determination of reactor size for a given feed rate and required conversion. Compare Eqs. 11 and 17. The difference is that in plug flow rA varies, whereas in mixed flow ra is constant. As a more general expression for plug flow reactors, if the feed on which conversion is based, subscript 0, enters the reactor partially converted, subscript i. and leaves at a conversion designated by subscript f. we have possibleand convenient. To do this, insert the kinetic expression for ra in Eq. 17 and integrate. Some of the simpler integrated forms for plug flow are as follows: Zero-order homogeneous reaction, any constant & A kCAV kt = (20) FAO : CAXA First-order irreversible reaction, A products, any constant &a, kt= - (1 + a) In (1 XA) EAXA (21) First-order reversible reaction, AZrR, Cro/CAo = M, kinetics approximated or =