FLUIDIZED-BED COMBUSTION OF A CHARGE OF COKE WITH A WIDE DISTRIBUTION OF PARTICLE SIZES

• Type: Article in International Scientific Journal
• Date: 1994

Authors

MOTA, ODS (Author) FEUP; PINTO, AMFR (Author) FEUP; CAMPOS, JBLM (Author) FEUP

Journal

Title: Chemical Engineering Science

Vol. 49 No. 24 A

Pages: 1097-1105

ISSN: 0009-2509

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 3 Citations

Scopus - 3 Citations

Scientific classification

FOS: Engineering and technology > Chemical engineering

Other information

Authenticus ID: P-001-K6V

DOI: 10.1016/0009-2509(94)85082-8

Abstract (EN): We describe a study of the combustion of charges of coke with a wide range of particle sizes in fluidised beds of sand. The coke particles ranged in size from 2.0 to 6.5 mm and experiments were performed with small and large charges of particles. In the latter case the experiments were performed only in conditions where the mass transfer resistance of O2 from the bubbles to the particulate phase had a negligible contribution to the overall O2 mass transfer resistance. The beds of sand were made of closely sized particles with average diameters of 0.23, 0.46 and 0.65 mm. The beds were operated at atmospheric pressure and at a temperature of 1223 K. A simple theory was developed, based on the findings of Pinto and Guedes de Carvalho (1990, Trans. Instn chem. Engrs 68A, 503-509) and Guedes de Carvalho et al. (1991, Trans. Instn chem. Engrs 69A, 63-70), to predict the mass transfer resistance of O2 from the particulate phase to the burning particles and the burn-out time. This theory shows excellent agreement with the experimental data.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9