Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search > Publication Information

  1. Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub

    Description

    Biofuel properties can be improved through torrefaction, whereby the biomass is treated with moderately elevated temperatures (200–300°C) under conditions that are essentially anaerobic and at atmospheric pressure. Varying the torrefaction conditions of temperature and treatment duration, as well as any feedstock pretreatments (drying, grinding), can generate products having varying degrees of thermal degradation, thus impacting performance in subsequent biofuel applications (e.g., gasifcation, pyrolysis, combustion). Pulp-grade pine wood chips were processed through a laboratory-scale crucible furnace retort with the remaining solid carbonized products subjected to ultimate, proximate, and spectroscopic analyses. Compared to air-dry wood chips, lower mass yields (i.e., greater thermal degradation) resulted from oven drying or grinding pretreatments. Regarding the torrefaction conditions, the degree of thermal degradation varied to a greater extent as a function of applied temperature than treatment duration. Furthermore, mass yield explained 95% of the variation in higher heating value. Fourier transform infrared (FTIR) spectroscopy combined with principal component analysis gave plots in which sample points clustered by torrefaction temperature and time, as well as by sample type (i.e., with or without pretreatment). Partial least squares regression was able to accurately predict mass yield and to a lesser extent carbon content. Results suggest that FTIR monitoring of fnely ground samples in a production environment couldbe used off-line as a rapid assessment technique for mass yield and therefore facilitate adjustments to process parameters of temperature and/ or treatment duration.

    Publication Notes

    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    So, Chi-Leung; Eberhardt, Thomas L. 2018. FTIR-based models for assessment of mass yield and biofuel properties of torrefied wood. Wood Science and Technology. 52(1): 209-227.

    Cited

    Google Scholar

    Keywords

    Biofuels, FTIR spectroscopy, multivariate analysis, torrefied wood

    Related Search


    XML: View XML
Show More
Show Fewer
Jump to Top of Page
https://www.fs.usda.gov/treesearch/pubs/56319