Chemistry

Chemistry, 07.11.2019 10:31, arivalen

Why is particle size important in a heterogeneous catalyst

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Chemistry, 01.08.2019 05:30, kingjaydee3415

What advantage does a heterogeneous catalyst provide over a homogeneous catalyst in industrial processes? a heterogeneous catalyst provides a higher reaction rate. a heterogeneous catalyst can be easily separated from reactants. a heterogeneous catalyst raises the activation energy higher. a heterogeneous catalyst provides an alternate reaction pathway.

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Physics, 13.08.2019 03:30, dwavy29

The importance of diffusion in catalyst pellets can often be determined by measuring the effect of pellet size on the observed reaction rate. in this exercise, consider an irreversible first-order reaction occurring in catalyst pellets where the surface concentration of reactant a is cas=0.15 m. data: diameter of sphere cm 0.2 0.06 0.02 0.01 0.008 0.006 robs (mol/h/cm3) 0.25 0.8 1.8 2.4 2.5 2.5 a.) calculate internal effectiveness factor for each particle size b.) identify particles that experience no, negligible, intermediate, or strong diffusion limitation. c.) estimate the thiele modulus for a catalyst particle of diameter 0.1 cm.

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Mathematics, 24.10.2019 17:43, maxg7988

An important factor in solid missile fuel is the particle size distribution. signiﬁcant problems occur if the particle sizes are too large. from past production data, it has been determined that the particle size (in µm, i.e., micrometers) distribution is characterized by f(x) =(3x−4, x > 1 0, elsewhere. (a) find the mean particle size. (b) find the variance and standard deviation of the particle size.

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