EXAMPLE 12.1 BEHAVIOR OF A G/L CONTACTOR From the measured pulse tracer response curves (see figure), find the fraction of gas, of flowing liquid, and of stagnant liquid in the gas-liquid contactor shown in Fig. E12.1. L= 0.1 m³/s c.s. area = 1 m² For liquid For gas Voidage = 0.5 20 m Cg 0 69 15 40 1, sec 1, sec -G = 0.5 m³/s Figure E12.1 SOLUTION To find V, VI, and Vstag, first calculate i, and i, from the tracer curves. Thus from Fig. E12.1 Σ tC 8 (9-6) (h/2) + 11(15 - 9)(h/2) (15-6)(h/2) = Σε = 10 s