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Title: Size, shape and flow characterization of ground wood chip and ground wood pellet particles

Abstract

Size, shape and density of biomass particles influence their transportation, fluidization, rates of drying and thermal decomposition. Pelleting wood particles increases the particle density and reduces the variability of physical properties among biomass particles. In this study, pine chips prepared for pulping and commercially produced pine pellets were ground in a hammer mill using grinder screens of 3.2, 6.3, 12.7 and 25.4mmperforations. Pellets consumed about 7 times lower specific grinding energy than chips to produce the same size of particles. Grinding pellets produced the smaller particles with narrower size distribution than grinding chips. Derived shape factors in digital image analysis showed that chip particles were rectangular and had the aspect ratios about one third of pellet particles. Pellet particles were more circular shape. The mechanical sieving underestimated the actual particle size and did not represent the size of particles correctly. Instead, digital imaging is preferred. Angle of repose and compressibility tests represented the flow properties of ground particles. Pellet particles made a less compacted bulk, had lower cohesion and did flow easier in a pile of particles. In conclusion, particle shape affected the flow properties more than particle size

Authors:
 [1];  [1];  [1];  [2]
  1. Univ. of British Columbia, Vancouver, BC (Canada)
  2. Univ. of British Columbia, Vancouver, BC (Canada); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1328338
Alternate Identifier(s):
OSTI ID: 1406931
Grant/Contract Number:  
AC05-00OR22725; 11R08764
Resource Type:
Accepted Manuscript
Journal Name:
Powder Technology
Additional Journal Information:
Journal Volume: 301; Journal Issue: C; Journal ID: ISSN 0032-5910
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; size; shape; flowability; shape factor; ground chip; ground pellet

Citation Formats

Rezaei, Hamid, Lim, C. Jim, Lau, Anthony, and Sokhansanj, Shahab. Size, shape and flow characterization of ground wood chip and ground wood pellet particles. United States: N. p., 2016. Web. https://doi.org/10.1016/j.powtec.2016.07.016.
Rezaei, Hamid, Lim, C. Jim, Lau, Anthony, & Sokhansanj, Shahab. Size, shape and flow characterization of ground wood chip and ground wood pellet particles. United States. https://doi.org/10.1016/j.powtec.2016.07.016
Rezaei, Hamid, Lim, C. Jim, Lau, Anthony, and Sokhansanj, Shahab. Mon . "Size, shape and flow characterization of ground wood chip and ground wood pellet particles". United States. https://doi.org/10.1016/j.powtec.2016.07.016. https://www.osti.gov/servlets/purl/1328338.
@article{osti_1328338,
title = {Size, shape and flow characterization of ground wood chip and ground wood pellet particles},
author = {Rezaei, Hamid and Lim, C. Jim and Lau, Anthony and Sokhansanj, Shahab},
abstractNote = {Size, shape and density of biomass particles influence their transportation, fluidization, rates of drying and thermal decomposition. Pelleting wood particles increases the particle density and reduces the variability of physical properties among biomass particles. In this study, pine chips prepared for pulping and commercially produced pine pellets were ground in a hammer mill using grinder screens of 3.2, 6.3, 12.7 and 25.4mmperforations. Pellets consumed about 7 times lower specific grinding energy than chips to produce the same size of particles. Grinding pellets produced the smaller particles with narrower size distribution than grinding chips. Derived shape factors in digital image analysis showed that chip particles were rectangular and had the aspect ratios about one third of pellet particles. Pellet particles were more circular shape. The mechanical sieving underestimated the actual particle size and did not represent the size of particles correctly. Instead, digital imaging is preferred. Angle of repose and compressibility tests represented the flow properties of ground particles. Pellet particles made a less compacted bulk, had lower cohesion and did flow easier in a pile of particles. In conclusion, particle shape affected the flow properties more than particle size},
doi = {10.1016/j.powtec.2016.07.016},
journal = {Powder Technology},
number = C,
volume = 301,
place = {United States},
year = {2016},
month = {7}
}

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Cited by: 2 works
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    Works referencing / citing this record:

    Fully Bio-Based Hybrid Composites Made of Wood, Fungal Mycelium and Cellulose Nanofibrils
    journal, March 2019