will be appreciated

3. For two parallel gas-phase reactions where D is the desired products: 2A B + c (1) AD (2) of which the reaction rates are: n = 6 PA? mole A reacted/hour-liter 12 = 3 PA mole D formed/hour-liter where the unit of P is atm. (a) for achieving high selectivity of D, do you prefer to use ambient pressure (1 atm) or pressurized (latm) reactor? (Justify your answer with equation and/or calculation; 10%) (b) If the reactions are carried out in a PFR and the inlet condition is 1 atm of pure A, what is the maximum yield of D and what is the corresponding conversion of A? (15%). (c) determine the PFR reactor needed to give 90% of A conversion derived from (b) (if you cannot calculate (b), just assume 90% conversion for your calculation) and the exit compositions. (15%) /+ [note that S dx/(ax+b)x = (1/b) In (x/ax+b) ] s