Using image analysis in the study of multiphase gas absorption

• Type: Article in International Scientific Journal
• Date: 2005

Authors

Mena, PC (Author) Other; Pons, MN (Author) Other; Teixeira, JA (Author) Other; Rocha, FA (Author) FEUP

Journal

Title: Chemical Engineering Science

Vol. 60 No. 2

Pages: 5144-5150

ISSN: 0009-2509

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 26 Citations

ISI Web of Science

Scopus - 35 Citations

COMPENDEX

Scientific classification

CORDIS: Technological sciences

FOS: Engineering and technology > Chemical engineering

Other information

Authenticus ID: P-000-1FF

DOI: 10.1016/j.ces.2005.04.049

Abstract (EN): For the air-water-calcium alginate beads system, the effect of the presence of solids on the mass transfer characteristics in a bubble column was experimentally studied. Volumetric liquid side mass transfer coefficient, k(L)a, specific interfacial area, a, and hence liquid side mass transfer coefficient, k(L), were determined under different solid concentrations (0, 5, and 10vol%), superficial gas velocities (up to 0.27cm/s) and solid sizes (1.2 and 2.1 turn diameter). The bubble characteristics, namely the interfacial area, were obtained using an image analysis technique. This technique proved to be a suitable and practical method to characterize mass transfer phenomena in bubble columns for the range of operating conditions used. The solids affect negatively k(L)a, decreasing both a and k(L), the effect being more pronounced for the smaller particles. For these particles the variation of k(L)a is due to the variation of its two components, while for larger particles k(L)a variation is due, essentially, to changes in k(L) as no significant differences in a were observed.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7