Final exam 2003

# Final exam 2003 - CHE-442 Final Exam Name S.S 1A gas...

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CHE-442 Final Exam Name: S.S.: 1A gas mixture containing 4% of component A (the rest of it an inert) is fed at a rate of 1 × 10 -5 m 3 /s through a 2-in ID tube, packed with porous catalyst solids at a constant temperature of 1200 K and a constant pressure of 101.3 kPa. The reaction (A B) occurring inside the porous pallets is first order -r A = K C A The reactor contains 6.4 Kg of catalyst and the inlet mole fraction of A is 4%. Calculate the mole fraction of A at the exit of the reactor. Additional information : K = 2.025 × 10 -7 m 3 / g-s ν = kinematic viscosity = 1.76 × 10 -8 m 2 / s D AB = gas phase diffusivity = 3 × 10 -8 m 2 / s ε = 0.3 τ = tortuosity =1.2 ρ C = density of catalyst particle = 2.6 g / cm 3 Φ = bed porosity = 0.4 ρ A = bulk density of bed =ρ C (1-Φ) R = pellet radius = 5 × 10 -3 m γ = 1.0

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Name: 2. Curves A, B and C show the variation in reaction rate as a function of the temperature for three different reactions catalyzed by solid catalyst pellets. What can you say about which mechanism limits the reaction rate for the three different cases?
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## This note was uploaded on 02/27/2008 for the course CHE 442 taught by Professor Tsotsis during the Fall '99 term at USC.

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Final exam 2003 - CHE-442 Final Exam Name S.S 1A gas...

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