Comparative analysis of fluidized and fixed beds to obtain data on the Char Pellet¿s combustion regime

• Type: Article in International Scientific Journal
• Date: 2020

Authors

Ferreira, T (Author) Other; Paiva, JM (Author) Other; C. Pinho (Author) FEUP

Journal

Title: International Journal of Energy for a Clean Environment

Vol. 21

Pages: 237-268

ISSN: 2150-3621

Publisher: Begell House

Indexing

Scopus - 0 Citations

Other information

Authenticus ID: P-00S-NYA

DOI: 10.1615/interjenercleanenv.2020034698

Abstract (EN): Three different types of biochar particles were made from fixed bed carbonization at 800oC of pellets produced with Pinus Pinaster, Acacia dealbata, and Cytisus scoparius. From the fluidized bed combustion of batches of these biochar particles at three different bed temperatures, 700, 800, and 900oC, kinetic and diffusive data were determined. Subsequently, batches of the same biochar particles were burned in a fixed bed, also for the same three bed temperatures of 700, 800, and 900oC. Through a mathematical model for combustion of batches of biochar particles in a fixed bed, combined with the kinetic data previously obtained through the fluidized bed combustion experiments, data concerning the fixed bed combustion was determined, namely, the in-bed interparticle competition factor for the available oxygen and the constriction factor. The relative importance of the in-bed diffusion, the heterogeneous reaction rate kinetics, and the bed fluid dynamics in fluidized and fixed bed combustion was also evaluated. © 2020 by Begell House, Inc.

Language: English

Type (Professor's evaluation): Scientific