Q 1: The gas phase reaction 2A → B is carried out in an isothermal plug flow reactor. The feed consists of 80 mol% A and 20 mol% inerts. If the conversion of A at the reactor exit is 50 %, then CA/CA0 at the outlet of the reactor is
Q 2: For a first-order isothermal chemical reaction in a porous catalyst, the effectiveness factor is 0.3. The effectiveness factor will increase if the
Q 3: A reversible liquid phase endothermic reaction is to be carried out in a plug flow reactor. For minimum reactor volume, it should be operated such that the temperature along the length.
Q 4: Liquid A decomposes in a batch reactor by zeroth-order kinetics. The initial concentration of A is 0.5 kmol/m3 and for a reaction time of 1200 s, the conversion is 40 %. Assume isothermal conditions. Determine (a) the rate constant for this reaction _______ mol/m3 s and (b) what will be the conversion for the reaction time of 3600 s?
Q 5: The liquid phase parallel reactions
A\rightarrow R;\;\;\;r_R=k_1C_A;\;\;\;k_1=0.3\;s^{-1} A\rightarrow S;\;\;\;r_S=k_2;\;\;\;k_2=0.3\;kmol/(m^3.s)is conducted in an isothermal plug flow reactor. The inlet concentration of A is 2 kmol/m3. No products are present in the feed. If the conversion of A is 80 %, then determine the exit concentration of R (in kmol/m3).
Q 6: The first order, exothermic, irreversible, liquid phase reaction A→B is to be conducted in an adiabatic CSTR. The desired conversion is 70 % and the reactor is to be operated at 353 K.
Data: The rate constant at 353 K = 0.02 s-1; Inlet volumetric flow rate = 0.01 m3/s; Density of the inlet stream = 1000 kg/m3; Inlet concentration of A = 2 kmol/m3; Heat of reaction (independent of temperature) = -50,000 kJ/kmol of A reacting; Average heat capacity of inlet and outlet streams = 2 kJ/kg.K
For the data given above, find (a) the required volume of the CSTR (in m3) (b) the feed temperature (in K).