EFFECT OF FORCED-CONVECTION ON REACTION WITH MOLE CHANGES IN POROUS CATALYSTS

• Type: Article in International Scientific Journal
• Date: 1995

Authors

NAN, HS (Author) Other; DIAS, MM (Author) FEUP; RODRIGUES, AE (Author) FEUP

Journal

Title: Chemical Engineering Journal and the Biochemical Engineering Journal

Vol. 57 No. 2

Pages: 101-114

ISSN: 0923-0467

Publisher: Elsevier B.V.

Indexing

ISI Web of Knowledge - 7 Citations

ISI Web of Science

Scopus - 7 Citations

COMPENDEX

Scientific classification

FOS: Engineering and technology > Chemical engineering

Other information

Authenticus ID: P-001-H2N

DOI: 10.1016/0923-0467(94)02930-x

Abstract (EN): 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, phi; the ratio alpha between the Knudsen and effective diffusivities; the ratio beta between the viscous momentum and molecular diffusivity; the normalized external pressure drop Delta 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 14