Convection, diffusion, and exothermic zero-order reaction in a porous catalyst slab: Scaling and perturbation analysis

• Tipo: Artigo em Revista Científica Internacional
• Data: 2009

Autores

João P. Lopes (Autor) FEUP; Silvana S. S. Cardoso (Autor) FEUP; Alírio E. Rodrigues (Autor) FEUP

Revista

Título: AICHE Journal

Vol. 55 Nº 10

Páginas: 2686-2699

ISSN: 0001-1541

Editora: Wiley-Blackwell

Indexação

ISI Web of Knowledge - 4 Citações

ISI Web of Science

Scopus - 4 Citações

INSPEC

COMPENDEX

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia química

CORDIS: Ciências Tecnológicas > Engenharia > Engenharia química

Outras Informações

ID Authenticus: P-003-F4G

DOI: 10.1002/aic.11830

Abstract (EN): The analysis of the interaction between transport phenomena and chemical reaction inside large-pore catalyst particles needs to include intraparticular convection as an additional mass/heat transfer mechanism. In this work, we describe by a 3D regime diagram the global behavior of a permeable catalyst slab, where an exothermic, zero-order reaction is occurring. An order of magnitude estimate for the maximum temperature change is obtained by scaling techniques in each regime of operation. Specific operating regimes of fast mass/heat transport, dominant reaction and strong intraparticular convection, are then studied in more detail using perturbation analysis. The results include approximate concentration and temperature profiles, which allow the estimation of both the effectiveness factor and maximum temperature attained inside the catalyst in these regimes.

Idioma: Inglês

Tipo (Avaliação Docente): Científica