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

• Tipo: Artigo em Revista Científica Internacional
• Data: 1995

Autores

NAN, HS (Autor) Outra; DIAS, MM (Autor) FEUP; RODRIGUES, AE (Autor) FEUP

Revista

Título: Chemical Engineering Journal and the Biochemical Engineering Journal

Vol. 57 Nº 2

Páginas: 101-114

ISSN: 0923-0467

Editora: Elsevier B.V.

Indexação

ISI Web of Knowledge - 7 Citações

ISI Web of Science

Scopus - 7 Citações

COMPENDEX

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia química

Outras Informações

ID Authenticus: 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 14