Devolatilization of wood and torrefied wood with different apparent density: Experimental and modelling study

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Abstract

In this work, single particle combustion experiments on 3 mm raw and torrefied wood cubes of 5 different wood species with apparent density varying from 243 to 698 kg/m3 were conducted, under conditions (1256 °C, 2.8% O2, 27% H2O) simulating the local conditions in a pulverized fuel boiler. The devolatilization time was determined based on flame extinction time, which was measured by a chargecoupled device (CCD) camera [1]. The devolatilization process was modelled by a non-isothermal single particle model presented in a previous paper [2]. The modelling results are in good agreement with experimental data as shown in Fig. 1. Both experimental and modelling results show that the devolatilization time increases linearly with the particle mass, even though different wood species with different apparent density are used in the experiments. The reason is that the devolatilization process is dominated by heat transfer. When the particle size is the same, higher density particles results in lower heating rate, mainly due to the increased thermal capacity of the particles. The results suggest that under the studied conditions, particle mass is a primary parameter that influences the devolatilization time of biomass particles.
Original languageEnglish
Publication date2018
Number of pages2
Publication statusPublished - 2018
EventJoint meeting of the Polish and Scandinavian-Nordic Sections of the Combustion Institute - AGH UST Center of Energy, Krakow, Poland
Duration: 6 Sep 20187 Sep 2018
https://meeting-agh.wixsite.com/psn2018
https://meeting-agh.wixsite.com/psn2018

Conference

ConferenceJoint meeting of the Polish and Scandinavian-Nordic Sections of the Combustion Institute
LocationAGH UST Center of Energy
CountryPoland
CityKrakow
Period06/09/201807/09/2018
Internet address

Cite this

Luo, H., Lu, Z., Jian, J., Wu, H., Jensen, P. A., & Glarborg, P. (2018). Devolatilization of wood and torrefied wood with different apparent density: Experimental and modelling study. Abstract from Joint meeting of the Polish and Scandinavian-Nordic Sections of the Combustion Institute, Krakow, Poland.
Luo, Hao ; Lu, Zhimin ; Jian, Jie ; Wu, Hao ; Jensen, Peter Arendt ; Glarborg, Peter. / Devolatilization of wood and torrefied wood with different apparent density: Experimental and modelling study. Abstract from Joint meeting of the Polish and Scandinavian-Nordic Sections of the Combustion Institute, Krakow, Poland.2 p.
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author = "Hao Luo and Zhimin Lu and Jie Jian and Hao Wu and Jensen, {Peter Arendt} and Peter Glarborg",
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Luo, H, Lu, Z, Jian, J, Wu, H, Jensen, PA & Glarborg, P 2018, 'Devolatilization of wood and torrefied wood with different apparent density: Experimental and modelling study' Joint meeting of the Polish and Scandinavian-Nordic Sections of the Combustion Institute, Krakow, Poland, 06/09/2018 - 07/09/2018, .

Devolatilization of wood and torrefied wood with different apparent density: Experimental and modelling study. / Luo, Hao; Lu, Zhimin; Jian, Jie; Wu, Hao; Jensen, Peter Arendt; Glarborg, Peter.

2018. Abstract from Joint meeting of the Polish and Scandinavian-Nordic Sections of the Combustion Institute, Krakow, Poland.

Research output: Contribution to conferenceConference abstract for conferenceResearchpeer-review

TY - ABST

T1 - Devolatilization of wood and torrefied wood with different apparent density: Experimental and modelling study

AU - Luo, Hao

AU - Lu, Zhimin

AU - Jian, Jie

AU - Wu, Hao

AU - Jensen, Peter Arendt

AU - Glarborg, Peter

PY - 2018

Y1 - 2018

N2 - In this work, single particle combustion experiments on 3 mm raw and torrefied wood cubes of 5 different wood species with apparent density varying from 243 to 698 kg/m3 were conducted, under conditions (1256 °C, 2.8% O2, 27% H2O) simulating the local conditions in a pulverized fuel boiler. The devolatilization time was determined based on flame extinction time, which was measured by a chargecoupled device (CCD) camera [1]. The devolatilization process was modelled by a non-isothermal single particle model presented in a previous paper [2]. The modelling results are in good agreement with experimental data as shown in Fig. 1. Both experimental and modelling results show that the devolatilization time increases linearly with the particle mass, even though different wood species with different apparent density are used in the experiments. The reason is that the devolatilization process is dominated by heat transfer. When the particle size is the same, higher density particles results in lower heating rate, mainly due to the increased thermal capacity of the particles. The results suggest that under the studied conditions, particle mass is a primary parameter that influences the devolatilization time of biomass particles.

AB - In this work, single particle combustion experiments on 3 mm raw and torrefied wood cubes of 5 different wood species with apparent density varying from 243 to 698 kg/m3 were conducted, under conditions (1256 °C, 2.8% O2, 27% H2O) simulating the local conditions in a pulverized fuel boiler. The devolatilization time was determined based on flame extinction time, which was measured by a chargecoupled device (CCD) camera [1]. The devolatilization process was modelled by a non-isothermal single particle model presented in a previous paper [2]. The modelling results are in good agreement with experimental data as shown in Fig. 1. Both experimental and modelling results show that the devolatilization time increases linearly with the particle mass, even though different wood species with different apparent density are used in the experiments. The reason is that the devolatilization process is dominated by heat transfer. When the particle size is the same, higher density particles results in lower heating rate, mainly due to the increased thermal capacity of the particles. The results suggest that under the studied conditions, particle mass is a primary parameter that influences the devolatilization time of biomass particles.

M3 - Conference abstract for conference

ER -

Luo H, Lu Z, Jian J, Wu H, Jensen PA, Glarborg P. Devolatilization of wood and torrefied wood with different apparent density: Experimental and modelling study. 2018. Abstract from Joint meeting of the Polish and Scandinavian-Nordic Sections of the Combustion Institute, Krakow, Poland.