Neraca Massa Total : (1)

Neraca massa komponen

(2)

Substitusi (1) -> (2)

(3)

Linearisasi :

(4)Pada Saat Steady State :

(5)

Eliminasi (4) (5) :

(6)

Misal :

Fa = Fa - FasFb = Fb Fbs Xc = xc - xcs

Xa = 1Persamaan (6) menjadi ;

(7)

Laplace Transform persamaan (7) : (8)

(9)

Diagram Blok :

FaFa

+

XC

-

FbFa