Q2. Ethylene oxide is an important chemical mostly produced as an intermediate in the production of other chemicals. It does have some specialist uses as a disinfectant when heating is not an option. Ethylene oxide is mostly produced through the partial oxidation of ethene: 1 C2H4 (g) + O2 (g) -> C2H4O(g) For this reaction, the rate equation is: TA = -KPAPB k = 0.15 mol/m.s.bar.6 The reactor will be run at 250 C and 20 bar. The plant you are looking at uses air separation before the reactor so pure oxygen can be used instead of air. The feed stream to the reactor is 40% oxygen and 60% ethene. The reactor is fed with 30 mol/s of ethene. a) What volume is required for a PFR to achieve 98% conversion of ethene? b) If the reactor tubes are 5 m long and have a diameter of 5 cm, how many tubes are required?