Question

Kinetic reactions

Please make sure you get the same answers as written and solve all the parts

Thanks in advance

3. The elementary gas-phase reaction A → B + 2C gives a rate constant of 10-4 min-1 at 50°C and has an activation energy of 85 kJ mol1. This reaction is carried out in a flow reactor that is operated isothermally at 127 °C with a negligible pressure drop. The reactor feed is pure A, entering at 127 °C and 10 atm at a molar flow rate of 2.5 mol/min. Calculate the reactor volume required for 90% conversion in: 1. (a) a PFR (Ans: 950 L) 2. (b) a CSTR (Ans: 4700 L) (c) Now consider pressure drop in a PFR where a 0.001 lit1. Make 2 plots. First, plot P vs. V for the range O<V< 1000 liters. Second, plot conversion vs. V comparing the result obtained considering pressure drop to the result obtained under isobaric conditions (part (a)). (d) Now consider the reaction to be reversible with Kc -0.025 mol /lit @T 400 K. Operating at T 400 K and isobarically at P - 10 atm compute the following: The volume required to achieve 90% of the equilibrium conversion in both a CSTR and a PFR. In addition, calculate the time required to achieve 90% of equilibrium conversion in a constant volume bath reactor that is initially charged with A to a pressure of 10 atm. Note that the equilibrium conversion in the flow systems is different than the batch. Why? (Ans: VCSTR 1150L, VPFR 260 L, tbatch 11.4 min)

Answer 1

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