English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/103015
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:


Kinetic models comparison for steam gasification of different nature fuel chars

AuthorsFermoso Domínguez, Javier ; Arias Rozada, Borja ; Pevida García, Covadonga ; González Plaza, Marta ; Rubiera González, Fernando ; Pis Martínez, José Juan
Char gasification
Kinetics models
Issue DateJun-2008
CitationJournal of Thermal Analysis and Calorimetry 91(3): 779-786 (2008)
AbstractThe reactivity in steam of five different types of solid fuels (two coals, two types of biomass and a petcoke) has been studied. The fuel chars were obtained by pyrolysis in a fixed-bed reactor at a temperature of 1373 K for 30 min. The gasification tests were carried out by thermogravimetric analysis (TG) at different temperatures and steam concentrations. The reactivity study was conducted in the kinetically controlled regime and three representative gas-solid models, volumetric model (VM), grain model (GM) and random pore model (RPM), were applied in order to describe the reactive behaviour of the chars during steam gasification. The kinetic parameters of these models were derived and the ability of the models to predict conversion and char reactivity during gasification was assessed. The best model for describing the behaviour of the samples was the RPM. The effect of the partial pressure of steam in gasification was studied, and the reaction order with respect to steam was determined. The reactivity of the chars was compared by means of a reactivity index. Biomass exhibited a higher reactivity than coals and petcoke. However, significant differences in reactivity were observed between the two types of biomass used, which could be due to catalytic effects.
Publisher version (URL)http://dx.doi.org/10.1007/s10973-007-8623-5
Appears in Collections:(INCAR) Artículos
Files in This Item:
File Description SizeFormat 
Kinetic_models_Fermoso.pdf203,63 kBAdobe PDFThumbnail
Show full item record
Review this work

Related articles:

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.