Title:
Numerical Simulation of Devolatilization of Wood Logs and Pressure Generation in the Wood Log Center
Author(s):
Haberle, I., Skreiberg, Ø., Haugen, N.E.L.
Document(s):
Paper
Poster
Abstract:
A transient model for devolatilization of a dry or wet cylindrical wood log is developed. The model is mesh-based and 1D even though the extension to 2D or 3D can easily be done. The stiff solid matrix of porous wood contains the gas phase (non-condensable gases, condensable gases and air). The gas is assumed to be ideal and Darcy's law is applied to define the gas phase motion within the pores. Devolatilization is described with a primary three independent competitive reactions model which is followed by secondary tar cracking and re-polymerization reactions. Overall good agreement between measurements and modeling results was found. This model can accurately predict the solid mass loss behavior, temperature history at the surface and in the wood log center. The model was applied to predict the pressure in the wood log center with respect to time. Special focus is on the identification of parameters that influence the pressure peak formation in the center of the wood log.
Keywords:
drying, pressure, tar, thermochemical conversion, wood
Topic:
Biomass Conversion Technologies for Heating, Cooling and Electricity
Subtopic:
Biomass and Bioliquids Combustion for Small and Medium Scale Applications
Event:
25th European Biomass Conference and Exhibition
Session:
2BV.1.15
Pages:
561 - 565
ISBN:
978-88-89407-17-2
Paper DOI:
10.5071/25thEUBCE2017-2BV.1.15
Price:
FREE
