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Single particle ignition and combustion of pulverized pine wood, wheat straw, rice husk and grape pomace

Weng, Wubin LU ; Costa, Mário; Aldén, Marcus LU and Li, Zhongshan LU (2018) In Proceedings of the Combustion Institute2000-01-01+01:00
Abstract

This work examines the combustion behavior of single pulverized biomass particles from ignition to early stages of char oxidation. The biomass residues investigated were pine wood, wheat straw, rice husk and grape pomace. The biomass particles, in the size range 224-250 μm, were injected upward into a confined region with hot combustion products, produced by a flat flame McKenna burner, with a mean temperature of 1610 K and a mean O2 concentration of 6.5 vol%. Temporally and spectrally resolved images of the single burning particles were recorded with an intensified charge-coupled device camera equipped with different band-pass spectral filters. Data are reported for CH*, C2*, Na* and K* chemiluminescence, and... (More)

This work examines the combustion behavior of single pulverized biomass particles from ignition to early stages of char oxidation. The biomass residues investigated were pine wood, wheat straw, rice husk and grape pomace. The biomass particles, in the size range 224-250 μm, were injected upward into a confined region with hot combustion products, produced by a flat flame McKenna burner, with a mean temperature of 1610 K and a mean O2 concentration of 6.5 vol%. Temporally and spectrally resolved images of the single burning particles were recorded with an intensified charge-coupled device camera equipped with different band-pass spectral filters. Data are reported for CH*, C2*, Na* and K* chemiluminescence, and thermal radiation from soot and char burning particles. The data on CH* and C2* chemiluminescence and soot thermal radiation permits to identify important differences between the ignition delay time, volatiles combustion time and soot formation propensity of the four biomass residues, which are mainly affected by their volatile matter content. The Na* and K* emission signals follow the same trends of the CH* and C2* emission signals until the end of the volatiles combustion stage, beyond which, unlike the CH* and C2* emission signals, they persist owing to their release from the char burning particles. Moreover, during the volatiles combustion stage, the Na*/CH* and K*/CH* ratios present constant values for each biomass residue. The CH* and thermal radiation emission data suggest that all biomass char particles experienced heterogeneous oxidation at or immediately after the extinction of the homogeneous volatiles combustion.

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author
organization
publishing date
type
Contribution to journal
publication status
epub
subject
keywords
Biomass residues, Chemiluminescence, Single particle combustion, Temporally and spectrally resolved images
in
Proceedings of the Combustion Institute2000-01-01+01:00
publisher
Elsevier
external identifiers
  • scopus:85048789494
ISSN
1540-7489
DOI
10.1016/j.proci.2018.05.095
language
English
LU publication?
yes
id
af02476b-8350-434c-b822-e0eecab4fea4
date added to LUP
2018-07-04 15:05:10
date last changed
2019-01-13 06:14:18
@article{af02476b-8350-434c-b822-e0eecab4fea4,
  abstract     = {<p>This work examines the combustion behavior of single pulverized biomass particles from ignition to early stages of char oxidation. The biomass residues investigated were pine wood, wheat straw, rice husk and grape pomace. The biomass particles, in the size range 224-250 μm, were injected upward into a confined region with hot combustion products, produced by a flat flame McKenna burner, with a mean temperature of 1610 K and a mean O<sub>2</sub> concentration of 6.5 vol%. Temporally and spectrally resolved images of the single burning particles were recorded with an intensified charge-coupled device camera equipped with different band-pass spectral filters. Data are reported for CH*, C<sub>2</sub>*, Na* and K* chemiluminescence, and thermal radiation from soot and char burning particles. The data on CH* and C<sub>2</sub>* chemiluminescence and soot thermal radiation permits to identify important differences between the ignition delay time, volatiles combustion time and soot formation propensity of the four biomass residues, which are mainly affected by their volatile matter content. The Na* and K* emission signals follow the same trends of the CH* and C<sub>2</sub>* emission signals until the end of the volatiles combustion stage, beyond which, unlike the CH* and C<sub>2</sub>* emission signals, they persist owing to their release from the char burning particles. Moreover, during the volatiles combustion stage, the Na*/CH* and K*/CH* ratios present constant values for each biomass residue. The CH* and thermal radiation emission data suggest that all biomass char particles experienced heterogeneous oxidation at or immediately after the extinction of the homogeneous volatiles combustion.</p>},
  author       = {Weng, Wubin and Costa, Mário and Aldén, Marcus and Li, Zhongshan},
  issn         = {1540-7489},
  keyword      = {Biomass residues,Chemiluminescence,Single particle combustion,Temporally and spectrally resolved images},
  language     = {eng},
  month        = {06},
  publisher    = {Elsevier},
  series       = {Proceedings of the Combustion Institute2000-01-01+01:00},
  title        = {Single particle ignition and combustion of pulverized pine wood, wheat straw, rice husk and grape pomace},
  url          = {http://dx.doi.org/10.1016/j.proci.2018.05.095},
  year         = {2018},
}