Question

4. [Problem 10-15, pp 332-333 in Hill.] The reaction between sodium thiosulfate and hydrogen peroxide in aqueous solution 2 Na2S203 4 H202 Na2S30s Na2S042 H20 2A +4B → C + D +2W is characterized by a second-order rate expression, A = k CACB k = (2.00 x 1010) e-8200/T Umol-S. For a feed stream containing 0.4 mol/L of A and 0.6 moVL of B at 20°C, calculate the residence time necessary to achieve 60% conversion of A in: (a) an adiabatic mixed-flow reactor, and (b) in an adiabatic plug-flow reactor. The heat of reaction at 25 oC is-586.2 kJ/molA, and the heat capacity of the process fluid is 4.186 kJ/L-K.

Answer 1