Two gas solid catalytic reactions (1) and (2) are studied in fixed bed rectors. Rates of reaction per unit mass of catalyst at constant composition and total pressure follow the relation with mass velocity as shown in the given figure. Interior pore surface is fully active. What do the results suggest about the two reactions. Explain.
Dehydrogenation of butane (C4H10) at atmospheric pressure was carried out over chromia-alumina catalyst at 5300C. The reaction follows a first order kinetics with rate constant of 0.94 cm3/s. g cat. The spherical catalyst have average diameter of 0.3 cm and average pore radius is 11 nm. Pellets have porosity of 0.35 and density 1 gm/cm3. Assume Knudsen diffusivity to be dominant. Predict an effectiveness factor for the catalyst. Use parallel pore model with a tortuosity factor of 3.0
The rate of main reaction and deactivation reaction are given as follows
How the kinetic parameters 'k' and 'kd' can be determined if the reaction is carried out in a mixed reactor under constant flow condition. Derive the required expression and define the notations used.
What are the different ways of catalyst deactivation? Name the type of deactivation for which the rate does not depend on the concentration of the reactants?
