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

Rezaei, Hamid; Lim, C. Jim; Lau, Anthony; Sokhansanj, Shahab

doi:10.1016/j.powtec.2016.07.016

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:

Rezaei, Hamid ^[1]; Lim, C. Jim ^[1]; Lau, Anthony ^[1]; Sokhansanj, Shahab ^[2]

Univ. of British Columbia, Vancouver, BC (Canada)
Univ. of British Columbia, Vancouver, BC (Canada); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Publication Date:: Mon Jul 11 00:00:00 EDT 2016

Research Org.:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1328338

Alternate Identifier(s):: OSTI ID: 1406931

Grant/Contract Number:: AC05-00OR22725

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.  doi:10.1016/j.powtec.2016.07.016.

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                    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

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                    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.

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@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         = {Mon Jul 11 00:00:00 EDT 2016},

  month        = {Mon Jul 11 00:00:00 EDT 2016}

}

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https://doi.org/10.1016/j.powtec.2016.07.016

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Works referencing / citing this record:

Fully Bio-Based Hybrid Composites Made of Wood, Fungal Mycelium and Cellulose Nanofibrils
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Scientific Reports, Vol. 9, Issue 1
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Title: Size, shape and flow characterization of ground wood chip and ground wood pellet particles

Abstract

Citation Formats

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The continuous flash pyrolysis of biomass journal, June 1984

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Physical Properties for Flow Characterization of Ground Biomass from Douglas Fir Wood journal, May 2013

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Flow properties and arching behavior of biomass particulate solids
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Internal particle size distribution of biofuel pellets
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SO2-catalyzed steam pretreatment enhances the strength and stability of softwood pellets
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Pyrolysis and gasification of pellets from sugar cane bagasse and wood
journal, July 2006

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journal, March 2000

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journal, November 2004

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journal, March 2004

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journal, March 2012

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Airflow versus pressure drop for a mixture of bulk wood chips and bark at different moisture contents
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