Question

Figure 1 shows a three-stage separation process. As it is a standardized industrial process, it is well known that the following process specifications are met: a) The ratio kg P3 / kg D3 is 3, b) the ratio kg P2 / kg D2 is 1 and c) In the current P2 by each mole of B there are four of A. Determine the composition of stream E. * Hint: Begin by posing mass balances for the entire process.

Dz = 10 kg (no C) D, A 0.50 B 0.23 C 0.27 1.00 D2 A 0.17 A B 0.10 C 0.73 1.00 P P2 PS 0 F-100 kg 0.50 A 0.20 B 0.30 C A 0.70 B 0.30 1.00 Figura 1. Diagrama de proceso de un sistema de separación de 3 etapas.

Answer 1

Apply Oueray balance F =DI+D 2 + D3 + P3 100= 1 + P2+10+ P3 Dit D2 + P3 = 90 Apply overall a balance 0.5x100 = 0.50 +0.170 240.7 Pz+ Ain h 50=0.5Dit 0.17 D2 + 6.7P2 + XD3 D3 H3 - Ain Dz P3 D3 3 (given ) & PL Dz P3- 3x10 = 30 from © Di + P2=60 2 Apply oueran balance in 1+2 unit taking as whole F ² Dit D2 + P2 f E. 10- 604 Pzt E ..P2+E=40 Overall ( balance 0.34100 = 0.27D +0.732 30= 0.27 Dit 0.7312 y

Solving we get and 9 Simultaneously D, 230,82 230 from la 50-0.5x30+ 0.17830 +0.7430 + Xo3x10 50=15+ sol+21+100003 JOG 8.9=loxos KAz = 0.89 o. A in P320.89 13 in D32 1-0.89 = 0.11 P2 D2 12=30 From 3 P2fE240 e 10 E stream Contain only A and B because at (3 the outlet Contein hotc in D34 P3 horeo, c balana at 6.34100 = 0.27X01 + xepili @ 30= 0.27X30 t Xep XP, Hepi= cinpil Teacher's Signature

In P2 stream Imol of 13 there are ЧА "/ et A = 9 908 - о, о, о A balance in ② o 8 2 + Хар - Е - Yo7 D7 +0.75 Оу 20 + XAE - ЧО - 0 84 xlo + О.Эх 30 Кле О.ІЧ7s i Ain E 6. Гу . . ВИЕ -o-ly = 0.8ги