A first-order, gas-phase reaction, AB, is performed in a packed plug flow reactor. The reactor is packed with 1.2cm radius porous pellets, which leads to a bed voidage b=0.2. The effective diffusivity (De) for the reactant within the catalyst particle is 0.001cm2/s. The residence time required for 97% conversion of A was 20 minutes. Assume the reactor operates isothermally and that external mass-transfer limitations are negligible. a) What is the effectiveness factor (Ei) of particle? b) For diffusional limitation to be considered insignificant, the internal effectiveness must be higher than 0.95 . What catalyst particle size would correspond with that requirement for effectiveness factor? c) Considering the difficulties when working with small size catalyst particles (i.e., significant pressure drop) the particle size was kept the same as in part a) for a new design of the catalyst particle. Sg is decreased 20%,b is reduced by 5%, while effective diffusivity De increases 100%. Determine the effectiveness factor for the new catalyst particle? A first-order, gas-phase reaction, AB, is performed in a packed plug flow reactor. The reactor is packed with 1.2cm radius porous pellets, which leads to a bed voidage b=0.2. The effective diffusivity (De) for the reactant within the catalyst particle is 0.001cm2/s. The residence time required for 97% conversion of A was 20 minutes. Assume the reactor operates isothermally and that external mass-transfer limitations are negligible. a) What is the effectiveness factor (Ei) of particle? b) For diffusional limitation to be considered insignificant, the internal effectiveness must be higher than 0.95 . What catalyst particle size would correspond with that requirement for effectiveness factor? c) Considering the difficulties when working with small size catalyst particles (i.e., significant pressure drop) the particle size was kept the same as in part a) for a new design of the catalyst particle. Sg is decreased 20%,b is reduced by 5%, while effective diffusivity De increases 100%. Determine the effectiveness factor for the new catalyst particle