Answer Happy

Problem on catalyst deactivation At 730 K the irreversible isomerisation reaction A to R proceeds on a deactivating catalyst with a second-order reaction rate: -r/= k'Cza mol [hr geat Since reactants and product molecules are quite similar in structure, deactivation is caused by both A and R. With diffusional effects absent, the rate of deactivation is found to be: ka (C₁+CR)a [day-¹] dt An operation is planned in an isothermal and isobaric packed bed reactor containing W = 1000 kg of catalyst for 12 days using a stead feed of pure A, FAO = 5 kmol/hr at 730 K and 3.0 bar. a) Show that the catalyst activity after 12 days of operation is less than 5% of the fresh catalyst b) What is the conversion at the start of the run? c) What is the conversion at the end of the run? d) As good as you can, make a figure of the conversion as a function of time, and determine the average conversion over the 12-day run? k' 200 dm mol ¹9cat hr-1 10 dm³ mol-¹day-¹ ka