Experimental and modelling study on the influence of wood type, density, water content, and temperature on wood devolatilization

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Wood devolatilization experiments in a single particle combustor and comparison with a 1D devolatilization model were carried out to investigate the effects of wood particle properties and operating conditions on wood particle devolatilization time. The experiments were conducted with 3 mm spherical/cubic and 4 mm spherical particles at gas temperatures of 1200–1450 °C and oxygen contents of 0–4.4 vol%. Both experimental and modelling results showed that the devolatilization time increases linearly with particle density for raw, wetted, and torrefied wood particles. A sensitivity analysis done with the 1D devolatilization model showed that the biomass devolatilization time is sensitive to particle size, moisture content, gas temperature and particle density, and insensitive to volatiles fraction and gas velocity under the investigated experimental conditions. Using the same devolatilization kinetics, the 1D model could predict well the devolatilization time of different wood species with different particle size, density and moisture content. With this in mind, a simple correlation for devolatilization time has been developed based on the simulation data from the 1D model. The correlation uses a four-variable function with inputs of particle size, moisture content, gas temperature and particle density to determine the devolatilization time of biomass. Experimental devolatilization time found in literature could be predicted within ±25% for large particles (1–10 mm) under high temperature conditions (1000–1600 °C).
Original languageEnglish
Article number116410
JournalFuel
Volume260
Number of pages12
ISSN0016-2361
DOIs
Publication statusPublished - 2020

Keywords

  • Biomass
  • Devolatilization
  • Particle density
  • Single particle model

Cite this

@article{0bd0eec00ed04c14b876d8e12909f43b,
title = "Experimental and modelling study on the influence of wood type, density, water content, and temperature on wood devolatilization",
abstract = "Wood devolatilization experiments in a single particle combustor and comparison with a 1D devolatilization model were carried out to investigate the effects of wood particle properties and operating conditions on wood particle devolatilization time. The experiments were conducted with 3 mm spherical/cubic and 4 mm spherical particles at gas temperatures of 1200–1450 °C and oxygen contents of 0–4.4 vol{\%}. Both experimental and modelling results showed that the devolatilization time increases linearly with particle density for raw, wetted, and torrefied wood particles. A sensitivity analysis done with the 1D devolatilization model showed that the biomass devolatilization time is sensitive to particle size, moisture content, gas temperature and particle density, and insensitive to volatiles fraction and gas velocity under the investigated experimental conditions. Using the same devolatilization kinetics, the 1D model could predict well the devolatilization time of different wood species with different particle size, density and moisture content. With this in mind, a simple correlation for devolatilization time has been developed based on the simulation data from the 1D model. The correlation uses a four-variable function with inputs of particle size, moisture content, gas temperature and particle density to determine the devolatilization time of biomass. Experimental devolatilization time found in literature could be predicted within ±25{\%} for large particles (1–10 mm) under high temperature conditions (1000–1600 °C).",
keywords = "Biomass, Devolatilization, Particle density, Single particle model",
author = "Hao Luo and Zhimin Lu and Jensen, {Peter Arendt} and Peter Glarborg and Weigang Lin and Kim Dam-Johansen and Hao Wu",
year = "2020",
doi = "10.1016/j.fuel.2019.116410",
language = "English",
volume = "260",
journal = "Fuel",
issn = "0016-2361",
publisher = "Elsevier",

}

TY - JOUR

T1 - Experimental and modelling study on the influence of wood type, density, water content, and temperature on wood devolatilization

AU - Luo, Hao

AU - Lu, Zhimin

AU - Jensen, Peter Arendt

AU - Glarborg, Peter

AU - Lin, Weigang

AU - Dam-Johansen, Kim

AU - Wu, Hao

PY - 2020

Y1 - 2020

N2 - Wood devolatilization experiments in a single particle combustor and comparison with a 1D devolatilization model were carried out to investigate the effects of wood particle properties and operating conditions on wood particle devolatilization time. The experiments were conducted with 3 mm spherical/cubic and 4 mm spherical particles at gas temperatures of 1200–1450 °C and oxygen contents of 0–4.4 vol%. Both experimental and modelling results showed that the devolatilization time increases linearly with particle density for raw, wetted, and torrefied wood particles. A sensitivity analysis done with the 1D devolatilization model showed that the biomass devolatilization time is sensitive to particle size, moisture content, gas temperature and particle density, and insensitive to volatiles fraction and gas velocity under the investigated experimental conditions. Using the same devolatilization kinetics, the 1D model could predict well the devolatilization time of different wood species with different particle size, density and moisture content. With this in mind, a simple correlation for devolatilization time has been developed based on the simulation data from the 1D model. The correlation uses a four-variable function with inputs of particle size, moisture content, gas temperature and particle density to determine the devolatilization time of biomass. Experimental devolatilization time found in literature could be predicted within ±25% for large particles (1–10 mm) under high temperature conditions (1000–1600 °C).

AB - Wood devolatilization experiments in a single particle combustor and comparison with a 1D devolatilization model were carried out to investigate the effects of wood particle properties and operating conditions on wood particle devolatilization time. The experiments were conducted with 3 mm spherical/cubic and 4 mm spherical particles at gas temperatures of 1200–1450 °C and oxygen contents of 0–4.4 vol%. Both experimental and modelling results showed that the devolatilization time increases linearly with particle density for raw, wetted, and torrefied wood particles. A sensitivity analysis done with the 1D devolatilization model showed that the biomass devolatilization time is sensitive to particle size, moisture content, gas temperature and particle density, and insensitive to volatiles fraction and gas velocity under the investigated experimental conditions. Using the same devolatilization kinetics, the 1D model could predict well the devolatilization time of different wood species with different particle size, density and moisture content. With this in mind, a simple correlation for devolatilization time has been developed based on the simulation data from the 1D model. The correlation uses a four-variable function with inputs of particle size, moisture content, gas temperature and particle density to determine the devolatilization time of biomass. Experimental devolatilization time found in literature could be predicted within ±25% for large particles (1–10 mm) under high temperature conditions (1000–1600 °C).

KW - Biomass

KW - Devolatilization

KW - Particle density

KW - Single particle model

U2 - 10.1016/j.fuel.2019.116410

DO - 10.1016/j.fuel.2019.116410

M3 - Journal article

VL - 260

JO - Fuel

JF - Fuel

SN - 0016-2361

M1 - 116410

ER -