A mixture of methanol and water is sent to a flash distillation drum operating at 1.0 atm. Feed rate is 10.0 kmol/h. The feed before the valve in Figure 2-1 is at 102.0C and a pressure of 5.0 bar. Equilibrium data are in Table 2-8.

Figure 2-1

Table 2-8

a. Feed is 40.0 mol% methanol and V/F = 0.60. Find V, L, y, x, Tdrum.

b. Feed is 40.0 mol% methanol and T = 78.0C. Find y, x, V, and L.

c. V/F = 0.300. Vapor product is 80.0 mol % methanol. Find x, V, L, and z.

d. If the drum is adiabatic, how would you determine Q for the flash drum for these three problems?

Transcribed Image Text:

700000 TF PF I (hF 1 Vy Hv | Demister Feed F,z Tarum Valve P. T, P Pump Heater Pdrum QH L,X hL