Simulations of biomass pyrolysis using glued-sphere CFD-DEM with 3-D intra-particle models

Lu, Liqiang; Gao, Xi; Shahnam, Mehrdad; Rogers, William A.

doi:10.1016/j.cej.2021.129564

Title: Simulations of biomass pyrolysis using glued-sphere CFD-DEM with 3-D intra-particle models

Abstract

The shape of biomass particles influences intra-particle heat transfer, particle-particle collisions, interphase momentum, heat transfer, and pyrolysis yield. In this research, the effects of these multi-scale phenomena are captured using a glued-sphere computational fluid dynamic discrete element method (CFD-DEM) with 3-D intra-particle models. The glued-spheres resolved the shapes of particles and intra-particle temperature and species distributions. The implementation was validated using the pyrolysis data of a spherical particle and a cylindrical particle. Then, the influences of biomass shapes and sizes on pyrolysis were investigated. The results revealed the significant influence of surface areas and mass distributions on interphase heat transfer and chemical reactions. The intra-particle heat transfer is neglectable for a Biot number smaller than 0.41. Finally, the pyrolysis of irregularly shaped biomass particles in a fixed bed, fluidized bed, and spouted bed was simulated. Analysis of conversion distributions showed the largest deviations in the fixed bed and the slowest conversion rate in the spouted bed. A good balance between uniform and fast conversion is achieved in the fluidized bed. The multi-scale method proposed in this research provides a tool for the evaluation of large irregular-shaped biomass particle pyrolysis in different types of reactors.

Authors:

Lu, Liqiang ^[1]; Gao, Xi ^[1]; Shahnam, Mehrdad ^[2]; Rogers, William A. ^[2]

National Energy Technology Lab. (NETL), Morgantown, WV (United States); Leidos, Inc., Morgantown, VA (United States)
National Energy Technology Lab. (NETL), Morgantown, WV (United States)

Publication Date:: Wed Mar 31 00:00:00 EDT 2021

Research Org.:: National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV, and Albany, OR (United States)

Sponsoring Org.:: USDOE Office of Fossil Energy (FE)

OSTI Identifier:: 1842505

Grant/Contract Number:: 89243318CFE000003

Resource Type:: Accepted Manuscript

Journal Name:: Chemical Engineering Journal

Additional Journal Information:: Journal Volume: 419; Journal Issue: NA; Journal ID: ISSN 1385-8947

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; pyrolysis; intra-particle; biomass; CFD-DEM; shape; glued-sphere

Citation Formats


                    Lu, Liqiang, Gao, Xi, Shahnam, Mehrdad, and Rogers, William A. Simulations of biomass pyrolysis using glued-sphere CFD-DEM with 3-D intra-particle models.  United States: N. p., 2021. 
Web.  doi:10.1016/j.cej.2021.129564.

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                    Lu, Liqiang, Gao, Xi, Shahnam, Mehrdad, & Rogers, William A. Simulations of biomass pyrolysis using glued-sphere CFD-DEM with 3-D intra-particle models.  United States.  https://doi.org/10.1016/j.cej.2021.129564

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                    Lu, Liqiang, Gao, Xi, Shahnam, Mehrdad, and Rogers, William A. Wed .  
"Simulations of biomass pyrolysis using glued-sphere CFD-DEM with 3-D intra-particle models".  United States.  https://doi.org/10.1016/j.cej.2021.129564.  https://www.osti.gov/servlets/purl/1842505.

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@article{osti_1842505,

  title        = {Simulations of biomass pyrolysis using glued-sphere CFD-DEM with 3-D intra-particle models},

  author       = {Lu, Liqiang and Gao, Xi and Shahnam, Mehrdad and Rogers, William A.},

  abstractNote = {The shape of biomass particles influences intra-particle heat transfer, particle-particle collisions, interphase momentum, heat transfer, and pyrolysis yield. In this research, the effects of these multi-scale phenomena are captured using a glued-sphere computational fluid dynamic discrete element method (CFD-DEM) with 3-D intra-particle models. The glued-spheres resolved the shapes of particles and intra-particle temperature and species distributions. The implementation was validated using the pyrolysis data of a spherical particle and a cylindrical particle. Then, the influences of biomass shapes and sizes on pyrolysis were investigated. The results revealed the significant influence of surface areas and mass distributions on interphase heat transfer and chemical reactions. The intra-particle heat transfer is neglectable for a Biot number smaller than 0.41. Finally, the pyrolysis of irregularly shaped biomass particles in a fixed bed, fluidized bed, and spouted bed was simulated. Analysis of conversion distributions showed the largest deviations in the fixed bed and the slowest conversion rate in the spouted bed. A good balance between uniform and fast conversion is achieved in the fluidized bed. The multi-scale method proposed in this research provides a tool for the evaluation of large irregular-shaped biomass particle pyrolysis in different types of reactors.},

  doi          = {10.1016/j.cej.2021.129564},

  journal      = {Chemical Engineering Journal},

  number       = NA,

  volume       = 419,

  place        = {United States},

  year         = {Wed Mar 31 00:00:00 EDT 2021},

  month        = {Wed Mar 31 00:00:00 EDT 2021}

}

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Title: Simulations of biomass pyrolysis using glued-sphere CFD-DEM with 3-D intra-particle models

Abstract

Citation Formats

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journal, June 2009

Laboratory studies on the influence of biomass particle size on pyrolysis and combustion using TG GC/MS
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Experimental and numerical investigation of sands and Geldart A biomass co‐fluidization
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