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    Author(s): J.R. Samaniuk; J. Wang; T.W. Root; C.T. Scott; D.J. Klingenberg
    Date: 2011
    Source: Korea-Australia Rheology Journal Volume 23, Number 4, December 2011 pp. 237-245; 2011.
    Publication Series: Scientific Journal (JRNL)
    Station: Forest Products Laboratory
    PDF: View PDF  (358.88 KB)

    Description

    Economic processing of lignocellulosic biomass requires handling the biomass at high solids concentration. This creates challenges because concentrated biomass behaves as a Bingham-like material with large yield stresses. Here we employ torque rheometry to measure the rheological properties of concentrated lignocellulosic biomass (corn stover). Yield stresses obtained using torque rheometry agree with those obtained using other rheometric methods, but torque rheometry can be used at much larger solids concentration (weight fractions of insoluble solids greater than 0.2). Yield stresses decrease with severity of hydrolysis, decrease when water-soluble polymers are added (for nonhydrolyzed biomass), and increase with particle length. Experimental results are qualitatively consistent with those obtained from particle-level simulations.

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    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Samaniuk, J.R.; Wang, J.; Root, T.W.; Scott, C.T.; Klingenberg, D.J. 2011. Rheology of concentrated biomass. Korea-Australia Rheology Journal. 23(4): 237-245.

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    Keywords

    Biomass, corn stover, rheology, yield stress, viscosity

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