A Review on Biomass Torrefaction Process and Product Properties

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Biomass Torrefaction is gaining attention as an important preprocessing step to improve the quality of biomass in terms of physical properties and chemical composition. Torrefaction is a slow heating of biomass in an inert or reduced environment to a maximum temperature of approximately 300 C. Torrefaction can also be defined as a group of products resulting from the partially controlled and isothermal pyrolysis of biomass occurring in a temperature range of 200-280 C. Thus, the process can be called a mild pyrolysis as it occurs at the lower temperature range of the pyrolysis process. At the end of the torrefaction ... continued below

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Tumuluru, Jaya Shankar; Sokhansanj, Shahab; Wright, Christopher T.; Hess, J. Richard & Boardman, Richard D. August 1, 2011.

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Biomass Torrefaction is gaining attention as an important preprocessing step to improve the quality of biomass in terms of physical properties and chemical composition. Torrefaction is a slow heating of biomass in an inert or reduced environment to a maximum temperature of approximately 300 C. Torrefaction can also be defined as a group of products resulting from the partially controlled and isothermal pyrolysis of biomass occurring in a temperature range of 200-280 C. Thus, the process can be called a mild pyrolysis as it occurs at the lower temperature range of the pyrolysis process. At the end of the torrefaction process, a solid uniform product with lower moisture content and higher energy content than raw biomass is produced. Most of the smoke-producing compounds and other volatiles are removed during torrefaction, which produces a final product that will have a lower mass but a higher heating value. The present review work looks into (a) torrefaction process and different products produced during the process and (b) solid torrefied material properties which include: (i) physical properties like moisture content, density, grindability, particle size distribution and particle surface area and pelletability; (ii) chemical properties like proximate and ultimate composition; and (iii) storage properties like off-gassing and spontaneous combustion.

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  • Symposium Focused on Thermochemical Conversion,Stillwater, Oklahoma,08/02/2011,08/02/2011

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  • Report No.: INL/CON-11-22634
  • Grant Number: DE-AC07-05ID14517
  • Office of Scientific & Technical Information Report Number: 1027911
  • Archival Resource Key: ark:/67531/metadc829892

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Office of Scientific & Technical Information Technical Reports

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  • August 1, 2011

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  • May 19, 2016, 3:16 p.m.

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  • Dec. 15, 2016, 3:13 p.m.

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Tumuluru, Jaya Shankar; Sokhansanj, Shahab; Wright, Christopher T.; Hess, J. Richard & Boardman, Richard D. A Review on Biomass Torrefaction Process and Product Properties, article, August 1, 2011; Idaho Falls, Idaho. (digital.library.unt.edu/ark:/67531/metadc829892/: accessed May 25, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.