10-19b with the increasing demand for xylene in the petrochemical industry, the production of xylene from toluene disproportionation has gained attention in recent years [ind. eng. chem. res., 26, 1854 (1987)]. this reaction, 2 toluene ⎯⎯→ benzene xylene catalyst 2t ⎯⎯→ b x was studied over a hydrogen mordenite catalyst that decays with time. as a first approximation, assume that the catalyst follows second-order decay rd kda2 and the rate law for low conversions is – r t′ = k t p t a with kt 20 g mol/h kg-cat atm and kd 1.6 h 1 at 735 k. (a) compare the conversion-time curves in a batch reactor containing 5 kg-cat at different initial partial pressures (1 atm, 10 atm, the reaction volume containing pure toluene initially is 1 dm3 and the temperature is 735 k. (b) what conversion can be achieved in a moving-bed reactor containing 50 kg of catalyst with a cat- alyst feed rate of 2 kg/h? toluene is fed at a pressure of 2 atm and a rate of 10 mol/min. (c) explore the effect of catalyst feed rate on conversion. (d) suppose that et 25 kcal/mol and ed 10 kcal/mol. what would the temperature–time trajec- tory look like for a cstr? what if et 10 kcal/mol and ed 25 kcal/mol?