Question

A perfectly mixed flow reactor is to be used to carry out the exothermic isomerisation reaction A -> R.

The rate is given by:

(-rA) = kCA (1st order)

where k = 4 × 106e-8000/T s-1, where T is in K.

The enthalpy of reaction ?HR = -167,480 kJ kmol-1

The molecular mass MA (=MR) = 100 kg kmol-1

CA0 initial concentration of A = 1 kmol m-3

For a temperature of 100°C and a production rate of R of 0.4 kg s-1

Calculate:

The reactor volume required for a conversion of 0.7.

The heat exchange requirement to maintain a temperature of 100 °C.

The heat transfer area required for this if the mean temperature of the cooling fluid is 40°C and the heat transfer coefficient U = 20 kJ m-2 K-1 min-1.

What is the required length of the cooling coil of 0.051 m diameter?

Answer 1