A CSTR is to be designed in which an exothermic liquid phase first order reaction of the type, A → R, is taking place. The reactor is to be provided with a jacket in which coolant is flowing. Following data is given: CA0= 5 kmole/m3; XA = 0.5; Feed temperature = reactor temperature = 40°C. Rate constant at 40°C = 1 min-1; (ΔH) = - 40kJ/mole; ρ = 1000kg/m3 CP = 4 J/gm.°C ; q = 10-3 m3/min (ρ and CP are same for the reactant and product streams). The amount of heat to be removed is_________________?

Correct answer: C. 5/3 kW

  • A. 2/3 kW
  • B. 1 kW
  • C. 5/3 kW
  • D. 4 kW

Explanation

The heat released is qCA0XA|ΔH| = (10⁻³)(5)(0.5)(40,000) kJ/min = 100 kJ/min, or 1.67 kW. Therefore about 5/3 kW must be removed by the jacket.

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