Particle modelling in biomass combustion using orthogonal collocation

Maulana G. Nugraha, Harwin Saptoadi, Muslikhin Hidayat, Bengt Andersson and Ronnie Andersson

Applied Energy, 2019, vol. 255, issue C

Abstract: Development of an accurate and computational efficient biomass particle model to predict particle pyrolysis and combustion is the focus of this paper. Partial differential equations (PDEs) for heat and mass balance are transformed into a system of coupled ordinary differential equations (ODEs) with the use of orthogonal collocation as the particle discretization method. The orthogonal collocation method is incorporated with comprehensive physicochemical mechanisms to predict the behavior of biomass components during particle pyrolysis and combustion. Heat adsorption by evaporated gas and water movement by diffusion inside the biomass matrix are included in the present work, in parallel with the effect of Stefan flow on the heat and mass transfer rates at the particle surface. Abandoning the classical interface-based modelling approach, the present approach allows decoupling between biomass components and spatial resolution, and the prediction of continuous intra-particle profiles.

Keywords: Biomass combustion; Biomass pyrolysis; Particle model; Orthogonal collocation; Stefan flow (search for similar items in EconPapers)
Date: 2019
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Citations: View citations in EconPapers (3)

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DOI: 10.1016/j.apenergy.2019.113868

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