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Title: Effects of thermal treatment on energy density and hardness of torrefied wood pellets

Here, three types of wood pellets samples, including two types of commercial pellets and one type of lab-made control pellets were torrefied in a fixed bed unit to study the effect of thermal pretreatment on the quality of wood pellets. The quality of wood pellets was mainly characterized by the pellet density, bulk density, higher heating value, Meyer hardness, saturated moisture uptake, volumetric energy density, and energy yield. Results showed that torrefaction significantly decreased the pellet density, hardness, volumetric energy density, and energy yield. The higher heating value increased and the saturated moisture content decreased after torrefaction. In view of the lower density, lower hardness, lower volumetric energy density, and energy yield of torrefied pellets, it is recommended that biomass should be torrefied and then compressed to make strong pellets of high hydrophobicity and volumetric energy density.
Authors:
 [1] ;  [2] ; ORCiD logo [1] ;  [1] ;  [3] ;  [4] ;  [1]
  1. Univ. of British Columbia, Vancouver (Canada)
  2. Univ. of British Columbia, Vancouver (Canada); Univ. of Science and Technology Beijing, Beijing (China)
  3. Univ. of British Columbia, Vancouver (Canada); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  4. Univ. of British Columbia, Vancouver (Canada); Univ. of Toronto, Toronto (Canada)
Publication Date:
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Fuel Processing Technology
Additional Journal Information:
Journal Volume: 129; Journal Issue: C; Journal ID: ISSN 0378-3820
Publisher:
Elsevier
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; pellets; torrefaction; effect; quality
OSTI Identifier:
1335310

Peng, Jianghong, Wang, Jingsong, Bi, Xiaotao T., Lim, C. Jim, Sokhansanj, Shahab, Peng, Hanchao, and Jia, Dening. Effects of thermal treatment on energy density and hardness of torrefied wood pellets. United States: N. p., Web. doi:10.1016/j.fuproc.2014.09.010.
Peng, Jianghong, Wang, Jingsong, Bi, Xiaotao T., Lim, C. Jim, Sokhansanj, Shahab, Peng, Hanchao, & Jia, Dening. Effects of thermal treatment on energy density and hardness of torrefied wood pellets. United States. doi:10.1016/j.fuproc.2014.09.010.
Peng, Jianghong, Wang, Jingsong, Bi, Xiaotao T., Lim, C. Jim, Sokhansanj, Shahab, Peng, Hanchao, and Jia, Dening. 2014. "Effects of thermal treatment on energy density and hardness of torrefied wood pellets". United States. doi:10.1016/j.fuproc.2014.09.010. https://www.osti.gov/servlets/purl/1335310.
@article{osti_1335310,
title = {Effects of thermal treatment on energy density and hardness of torrefied wood pellets},
author = {Peng, Jianghong and Wang, Jingsong and Bi, Xiaotao T. and Lim, C. Jim and Sokhansanj, Shahab and Peng, Hanchao and Jia, Dening},
abstractNote = {Here, three types of wood pellets samples, including two types of commercial pellets and one type of lab-made control pellets were torrefied in a fixed bed unit to study the effect of thermal pretreatment on the quality of wood pellets. The quality of wood pellets was mainly characterized by the pellet density, bulk density, higher heating value, Meyer hardness, saturated moisture uptake, volumetric energy density, and energy yield. Results showed that torrefaction significantly decreased the pellet density, hardness, volumetric energy density, and energy yield. The higher heating value increased and the saturated moisture content decreased after torrefaction. In view of the lower density, lower hardness, lower volumetric energy density, and energy yield of torrefied pellets, it is recommended that biomass should be torrefied and then compressed to make strong pellets of high hydrophobicity and volumetric energy density.},
doi = {10.1016/j.fuproc.2014.09.010},
journal = {Fuel Processing Technology},
number = C,
volume = 129,
place = {United States},
year = {2014},
month = {9}
}