Single Stage Contact

Streams leaving a stage are in equilibrium with each other. \[G_s(Y_0-Y_1) = L_s(X_1-X_0) \qquad \Longrightarrow \quad Y_0-Y_1 = \frac{-L_s}{G_s}(X_0-X_1)\] The compositions \(X_i\), and \(Y_i\) are in terms of mole ratios. \(L_s\) and \(G_s\) are molar flow rate of liquid and gas on solute free basis. Operating line is the representation of material balance.