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Q2. A non-porous catalyst is used for the following irreversible reaction: A(g)B(g)+C(g) bed has a voidage of 0.4 . The gas that enters the reactor
Q2. A non-porous catalyst is used for the following irreversible reaction: A(g)B(g)+C(g) bed has a voidage of 0.4 . The gas that enters the reactor is mostly an inert gas. Only 0.2v/V% of the feed stream is A. The feed stream is at 700C and 4 bar. The reactor is fed with 1m3/s of gas. The reactor is cylindrical with an internal diameter of 25cm and a length of 1m. The gas stream has a viscosity ()2105kg/m.s and the molecular weight of the inert gas is 40g/mol. The diffusivity of A in the inert gas is 0.3cm2/s. The recommended correlation for the mass transfer coefficient at these conditions is below. jD=StDSc2/3=ukm(DAB)2/3=b0.455(udP)0.407 Determine the following: a) If the surface reaction, adsorption/desorption, and internal transport in the catalyst particle are assumed to be very fast compared with the external mass transfer, what would be the conversion of A at the exit of the reactor? b) If a reactor with the same configuration as part (a) was run and the conversion was 10% less (e.g. 83%73% ) than the conversion in part (a), what is the k for the catalyst (/s2m2) ? Continue to assume that the adsorption/desorption, and internal transport are fast and do not impact reaction kinetics and that the surface reaction is first order
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