A two dimensional Euler-Lagrangian model of wood gasification in a charcoal bed — Particle histories
Artikel i vetenskaplig tidskrift, 2018

An Euler-Lagrangian simulation applied to wood gasification in a fluidized bed is used to investigate individual particle histories and to provide a statistical analysis for temperature, apparent density as well as radial and axial positions of charcoal and dry wood particles. The model and several parameter variations have been discussed in detail in previous articles [1–3]. Based on simulation results we find much higher particle heating rates than typically used to measure kinetic data for, e.g., pyrolysis models. Although we presented a rather complex interplay of particle heating rate, biomass decomposition, particle shrinkage and particle fluidization the simulation results emphasize the importance of the usage of realistic particle size distributions for the initial bed as well as the fuel inlet. Furthermore, particle shrinkage data in combination with mass decomposition data appear to be crucial for realistic simulations.

Pyrolysis

Charcoal bed

Wood gasification

Discrete element

Fluidized bed

Euler-Lagrange

Författare

Stephan Gerber

Freie Universität Berlin

Michael Oevermann

Chalmers, Mekanik och maritima vetenskaper, Förbränning

Powder Technology

0032-5910 (ISSN)

Vol. 324 5-15

Ämneskategorier

Energiteknik

Livsmedelsteknik

Strömningsmekanik och akustik

DOI

10.1016/j.powtec.2017.10.032