Uabc X, x* T Normal T No Spac.. Heading 1 Heading 2 Tit Font Paragraph Styles Off-gases: 4 mole% 0,, 96% N, PX =p-xylene S= solution TPA = terephthalic acid 02, N2, H20(v) 105°C, 5.5 atm H2O(1)...

Extracted text: Uabc X, x* T Normal T No Spac.. Heading 1 Heading 2 Tit Font Paragraph Styles Off-gases: 4 mole% 0,, 96% N, PX =p-xylene S= solution TPA = terephthalic acid 02, N2, H20(v) 105°C, 5.5 atm H2O(1) CONDENSER Air @ 25°C, 6.0 atm REACTOR PX(I) Reactor feed 3 kg S/kg PX PX, TPA, S TPA(s) SEPARATOR Recycle (1): PX, S A fresh feed of pure liquid PX combines with a recycle stream containing PX and a solution (S) of a catalyst (a cobalt salt) in a solvent (methanol). The combined stream, which contains S and PX in a 3:1 mass ratio, is fed to a reactor in which 90% of the PX is converted to TPA. A stream of air at 25°C and 6.0 atm absolute is also fed to the reactor. The air bubbles through the liquid and the reaction given above takes place under the influence of the catalyst. A liquid stream containing unreacted PX, dissolved TPA, and all the S that entered the reactor goes to a separator in which solid TPA crystals are formed and filtered out of the solution. The filtrate, which contains all the S and PX leaving the reactor, is the recycle stream. A gas stream containing unreacted oxygen, nitrogen, and the water formed in the reaction leaves the reactor at 105°C and 5.5 atm absolute and goes through a condenser in which essentially all the water is condensed. The uncondensed gas contains 4.0 mole% 02. Taking 100 kmol TPA produced/h as a basis of calculation, a. What is the required fresh feed rate (kmol PX/h)? bị What is the mass flow rate (kg/h) of the recycle stream?