Question

Question 11 10 Poir Consider ex 26.1-1. Calculate the y and x for toluene from the mixture at 85 C the values, in order are: A 0.55 and 0.45 B 0.90 and 0.78 0.45 and 0.55 0.10 and 0.22 E 063 and 0.18

BOOK: Transport Processes and Separation Process Principles, 5th ed, CJ Geankoplis, AA Hersel, DH Lepek, Prentice Hall 2018

Answer 1

The vapor pressure for Benzene & Toluene in the Berzene- Toluene system can be calculated from vapor pressure and Equilibrium -mole fraction Data for Benzene-Toluene system, Considering, Benzene as 'A and Toluene as 'B'. At 85°C (358k), vapor pressuse pressure of both the components are PA = 116.9 kPa for Benzene PB = 4600 kPa = 345 mm Hg (vapor por for Toluene, PA and PB can be calculated using Antoine Equation also Antoine Equation, r rapor pressure en Psat 877m mmig re evapor Psat = mmHg А B TTC T = o k

С. A Antoine constants for Benzene and Toluene. B 278 0.51 Benzene 15.9008 -52.36 Tolnene 16.0137 3096'52 - 53.67 On, substituting values of Antoine constants in epho, we get 117.02 KP a Ll6.9 kPa PA =P 877.69 mm reg 343.38mm rg 45.78 kpan 46 kPa 28 P8 * I Given total pressure, Py = 101.32 kPa Pr PA+PB using Raoult's law, Pr = XAPA + XQ PB PA* = XAPA PB RB PB XA taba PA* = partial pressure of A PT = XAPA + (1-RA) PB PA vapor pressure of a Pt = 24 x 17:02 + (1_XA)X 46 101:23 7 • 02 XA ++G XA 0.778 (for Benzene XB = = 1-A 1-0778 xp = 0.222 (for Toluene [ *

for Toluene, в = fee PT е 46 xО• 222 - 0:20 То): 22 О.Во for Benzene, ЧА = 1 - 0 = 0.9 ЧА ООО for Toluene at 85°C, 9 = одо хоо•22. is correct 1 So, option D