Please answer all the above questions correctly providing necessary formulae, equations, expressions, diagrams, charts, graphs, plots and tables.

9. A catalytic reaction AR is made in a packed bed employing a large recycle of product stream. Find the amount of catalyst that would be required for a feed rate of 300kmol/h to achieve 45% conversion of A with rA,owt=0.60kmol/kg catalyst.h. [5] 10. Discuss Mears' and Weisz Prater criterions for rate controlling resistances for solid catalyst. [5] CO5[10Marks] Answer any one question 11. a) What is meant by steady state multiplicity? With proper justification, sketch the ignitionextinction plot showing lower and upper steady state lines and locate the steady state points. Make a brief discussion about the stability of these steady states. Use the following figure: 11.b) What do you mean by runaway of a reactor? What is the upper limit" of (TTc) to avoid runaway? Justify with derivations. [4+6] 12. The elementary irreversible liquid-phase reaction AB takes place in a CSTR with a heat exchanger. Pure A enters the reactor. G(T) as a function of T is given below: [10] Find the steady-state temperatures for the CSTR in a graph paper. Given: UA=3600cal/minK,CP0=40cal/molK,FA0=10mol/min, Ambient Temperature, Ta= 27C, Feed Temperature, Ta=27C