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Numerical study on K/S/Cl release during devolatilization of pulverized biomass at high temperature

Fatehi, Hesameddin LU ; Costa, Mário and Bai, Xue Song LU (2020) In Proceedings of the Combustion Institute
Abstract

In this paper, the interaction between different organic and inorganic K/S/Cl compounds in the solid structure of biomass is studied and a model is presented to predict the temporal release of Kg, HCl, CH 3 Cl, KCl, KOH, K2 SO4 and SO2 from biomass devolatilization. Four types of pulverized biomass are chosen from literature, two of which have no chlorine content and two with chlorine content in lower stoichiometry to potassium. The results of the model are compared with the experimental measurements. In the presence of chlorine, KCl, HCl and K g were found to be the dominant chlorine and potassium species. In the absence of chlorine, K g dominates the release... (More)

In this paper, the interaction between different organic and inorganic K/S/Cl compounds in the solid structure of biomass is studied and a model is presented to predict the temporal release of Kg, HCl, CH 3 Cl, KCl, KOH, K2 SO4 and SO2 from biomass devolatilization. Four types of pulverized biomass are chosen from literature, two of which have no chlorine content and two with chlorine content in lower stoichiometry to potassium. The results of the model are compared with the experimental measurements. In the presence of chlorine, KCl, HCl and K g were found to be the dominant chlorine and potassium species. In the absence of chlorine, K g dominates the release of potassium. KOH and K 2 SO 4 release into the gas phase towards the end of devolatilization due to the overlapping with char combustion. SO 2 is the main sulfur species released into the gas phase. The model is coupled with a CFD solver where the gas phase chemistry of the K/S/Cl system can be studied using available chemical mechanisms for these species.

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organization
publishing date
type
Contribution to journal
publication status
epub
subject
keywords
Combustion, Numerical simulation, Potassium-Chlorine-Sulfur, Pulverized biomass, Soot
in
Proceedings of the Combustion Institute
publisher
Elsevier
external identifiers
  • scopus:85089510331
ISSN
1540-7489
DOI
10.1016/j.proci.2020.06.079
language
English
LU publication?
yes
id
e2a14755-8081-4f0b-bd6b-bcc85da7d5e3
date added to LUP
2020-08-28 11:18:00
date last changed
2020-09-02 05:04:16
@article{e2a14755-8081-4f0b-bd6b-bcc85da7d5e3,
  abstract     = {<p>In this paper, the interaction between different organic and inorganic K/S/Cl compounds in the solid structure of biomass is studied and a model is presented to predict the temporal release of K<sub>g</sub>, HCl, CH <sub>3</sub> Cl, KCl, KOH, K<sub>2</sub> SO<sub>4</sub> and SO<sub>2</sub> from biomass devolatilization. Four types of pulverized biomass are chosen from literature, two of which have no chlorine content and two with chlorine content in lower stoichiometry to potassium. The results of the model are compared with the experimental measurements. In the presence of chlorine, KCl, HCl and K <sub>g</sub> were found to be the dominant chlorine and potassium species. In the absence of chlorine, K <sub>g</sub> dominates the release of potassium. KOH and K <sub>2</sub> SO <sub>4</sub> release into the gas phase towards the end of devolatilization due to the overlapping with char combustion. SO <sub>2</sub> is the main sulfur species released into the gas phase. The model is coupled with a CFD solver where the gas phase chemistry of the K/S/Cl system can be studied using available chemical mechanisms for these species.</p>},
  author       = {Fatehi, Hesameddin and Costa, Mário and Bai, Xue Song},
  issn         = {1540-7489},
  language     = {eng},
  month        = {07},
  publisher    = {Elsevier},
  series       = {Proceedings of the Combustion Institute},
  title        = {Numerical study on K/S/Cl release during devolatilization of pulverized biomass at high temperature},
  url          = {http://dx.doi.org/10.1016/j.proci.2020.06.079},
  doi          = {10.1016/j.proci.2020.06.079},
  year         = {2020},
}