Measurements of effective diffusivity in large-pore permeable pellets with various geometries using the chromatographic method

• Type: Article in International Scientific Journal
• Date: 1996

Authors

Nan, HS (Author) Other; Dias, MM (Author) FEUP; Mata, VG (Author) Other; Rodrigues, AE (Author) FEUP

Journal

Title: Chemical Engineering Communications

Vol. 146

Pages: 201-229

ISSN: 0098-6445

Publisher: Taylor & Francis

Indexing

ISI Web of Knowledge - 2 Citations

ISI Web of Science

Scopus - 2 Citations

COMPENDEX

Scientific classification

FOS: Engineering and technology > Chemical engineering

CORDIS: Technological sciences > Engineering > Chemical engineering

Other information

Authenticus ID: P-001-F20

DOI: 10.1080/00986449608936490

Abstract (EN): Mathematical models for solid cylinder and hollow cylinder pellets, where intraparticle convection was considered, have been established and solutions in the Laplace domain have been obtained. Consequently, the equivalence between the hollow cylinder and the slab characteristic dimensions was presented for the first-order-reaction/diffusion/convection problem. A modified chromatographic method has been developed to measure the intraparticle diffusivity in solid cylinder pellets. The axial dispersion of the column packed with the hollow cylinder pellets was measured and a correlation for the Peclet number versus Reynolds number has been obtained. Intraparticle convection has been measured with large pore sphere pellets which present a "foam structure" by using the conventional chromatographic method. Intraparticle Peclet numbers and the permeability of this pellet were determined.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 29