Consider n'" order reaction (n>1) occurring in a porous spherical catalyst particle, A> products (-1) = k,C%) The Thiele modulus (r) represents the ratio of reaction rate and internal mass transfer rate, which can be written as K,S,P.C%s' = R D where R is catalyst particle radius (m), k, is rate constant (m/s), S, is catalyst particle internal surface arca (m/kg), p. is density of the catalyst particle, D. is effective diffusivity inside the catalyst particle (m/s), and Cas is reactant concentration at particle external surface (mol/m). Assume there is no temperature gradient inside the catalyst particle. (1) How to control the variables (R, k,, Sq, CA, D.) to minimize internal mass transfer limitations? Propose at least four methods and explain your answers. (2) How does temperature affect the Thiele modulus? Assume only k, and D are temperature- dependent. Also assume the temperature dependence of effective diffusivity (D.) can be described by the Arrhenius equation