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Prediction of the working parameters of a wood waste gasifier through an equilibrium model

2003; Elsevier BV; Volume: 44; Issue: 17 Linguagem: Inglês

10.1016/s0196-8904(03)00025-6

1879-2227

Carlos Roberto Altafini, Paulo Roberto Wander, Ronaldo M. Barreto,

Lignin and Wood Chemistry

This paper deals with the computational simulation of a wood waste (sawdust) gasifier using an equilibrium model based on minimization of the Gibbs free energy. The gasifier has been tested with Pinus Elliotis sawdust, an exotic specie largely cultivated in the South of Brazil. The biomass used in the tests presented a moisture of nearly 10% (wt% on wet basis), and the average composition results of the gas produced (without tar) are compared with the equilibrium models used. Sensitivity studies to verify the influence of the moisture sawdust content on the fuel gas composition and on its heating value were made. More complex models to reproduce with better accuracy the gasifier studied were elaborated. Although the equilibrium models do not represent the reactions that occur at relatively high temperatures (≈800 °C) very well, these models can be useful to show some tendencies on the working parameter variations of a gasifier.