Affordable Access

Publisher Website

Effect of forced convection on reaction with mole changes in porous catalysts

Authors
Journal
The Chemical Engineering Journal and the Biochemical Engineering Journal
0923-0467
Publisher
Elsevier
Publication Date
Volume
57
Issue
2
Identifiers
DOI: 10.1016/0923-0467(94)02930-x
Keywords
  • Forced Convection
  • Heterogeneous Reaction
  • Dusty-Gas Model
  • Porous Catalysts
Disciplines
  • Mathematics

Abstract

Abstract The effect of intraparticle forced convection on a heterogeneous reaction within a catalyst pellet is studied. The extended dusty gas model is used to describe mass transport for a first-order, irreversible, isothermal reaction with mole changes within a slab-geometry catalyst pellet. Four dimensionless parameters are introduced and studied: the Thiele modulus, ø; the ratio α between the Knudsen and effective diffusivities; the ratio β between the viscous momentum and molecular diffusivity; the normalized external pressure drop Δ f. Results show that pressure gradients can exist within the pellet, as a result of the reaction stoichiometry and the external pressure gradient. The effectiveness factor is not only dependent on the Thiele modulus and on the change in moles, but it is also dependent and enhanced by intraparticle forced convection.

There are no comments yet on this publication. Be the first to share your thoughts.