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The conversion of ortho molecular hydrogen to para molecular hydrogen is catalyzed by NiO catalyst. Consider a supported catalyst of this type with a specific
The conversion of ortho molecular hydrogen to para molecular hydrogen is catalyzed by
NiO catalyst. Consider a supported catalyst of this type with a specific surface area of
mg and a void volume of cmg The catalyst is available in spherical pellets
with an apparent particle density of gcm and a diameter of cm If the ortho
para hydrogen mixture is not too far from equilibrium, an apparent st order rate constant
is given by the following relation:
rate of approach to equilibrium krCC eq
In a system where the hydrogen pressure was atm and the temperature K the
experimentally observed apparent rate constant was cms gcatalyst Using the
straight cylindrical pore model discussed in class, determine:
a The mean pore radius
b The combined diffusivity for hydrogen in the pores of this catalyst
c effectiveness of catalyst
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