Hi,

please answer all parts, many thanks

(a) Why is an effective diffusivity defined when determining pore diffusion and what does it account for? [6 marks] (b) How can varying catalyst particle size during experimentation aid the understanding of pore diffusion? [5 marks] (c) When determining reaction kinetics for a heterogeneously catalysed batch reaction, how and why do you test for film diffusion? [4 marks] (d) For a 1= order reaction (A Products) the intrinsic rate of reaction is considered to be 4.32102molm2 cat s1. The rate of reaction is then determined to be 6.36101molm3 cat s1 for a spherical particle with diameter of 100mm and concentration of 2.00103molL5 of A. Using the information provided calculate: (i) The Thiele modulus for the 100mm particle ( 3 significant figures). [5 marks] (ii) The effective diffusivity ( 3 significant figures). [5 marks] [Total 25 marks] All parameters in the following equations have their usual meanings. MT=LDR(rN/CNNblL=nR1mR1000L Page 6 of 7