2. (a) Wrile short explanatory notes on the following using examples where appropriate. (i) Catalyst deactivation in chemical processes. [6 marks] (ii) Particle effectiveness factor, , and catalyst activity, a. [4 marks] (b) The following expression represent catalyst deactivation in CSTR reactor with diffusion effect. 1XAXA=3kISgcstrekdt/2 (i) Define all terms in the expression [3 marks] (ii) Re-write the expression above assuming there is no mass transfer limitation (diffusional effects). Justify your answer. [3 marks] (c) An irreversible reaction was carried out in a CSTR containing spherical particles catalyst of 24mm diameter. Pure reactant A was introduced at a pressure of 1atm and constant temperature of 300C with a space time of 4000(gs/m3). The conversion of A was measured with time as shown in the Table Q2 below: (i) Calculate the catalyst deactivation rate constant without diffusion. [6 marks] (ii) Give a concise explanation on how to verify if there are diffusion effects in the system. [3 marks] DATA De=2108m2/sSg=30m2/gs=1500g/m3