Gasification reactivity and physicochemical properties of the chars from raw and torrefied wood, grape marc, and macroalgae

Guo, Peijun, Saw, Woei L., Van Eyk, Philip J., Stechel, Ellen B., de Nys, Rocky, Ashman, Peter J., and Nathan, Graham J. (2017) Gasification reactivity and physicochemical properties of the chars from raw and torrefied wood, grape marc, and macroalgae. Energy & Fuels, 31 (3). pp. 2246-2259.

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Abstract

The gasification reactivity of the chars from both raw and torrefied wood, grape marc, and macroalgae has been investigated in this paper. The variations in char gasification reactivity were explained using further investigation of the physicochemical characteristics of the char that can influence the gasification reactivity, i.e., specific surface area, uniformity of the carbonaceous structure, and concentration of alkali metals (Na and K). It was found that the influence of the torrefaction process on the char gasification reactivity strongly depends upon the solid fuel properties and pyrolysis conditions. For a pyrolysis temperature of 800 degrees C, the gasification reactivity of the chars from both the torrefied grape marc and the torrefied macroalgae was lower than that of the chars from their corresponding raw fuels. This is mainly due to a lower specific surface area and a lower content of alkali metals (Na and/or K) in the chars produced from both the torrefied grape marc and the torrefied macroalgae than for those chars produced from their corresponding raw fuels. However, the opposite influence of torrefaction was found for the macroalgae char when the pyrolysis temperature was increased to 1000 degrees C. This is attributed mostly to the higher Na content and the more amorphous carbonaceous structure for the torrefied macroalgae char than for the raw macroalgae char.

Item ID: 50311
Item Type: Article (Refereed Research - C1)
ISSN: 1520-5029
Funders: Australian Renewable Energy Agency (ARENA), Chinese Scholarship Council (CSC), Australian Solar Institute (ASI), Australian Research Council (ARC)
Projects and Grants: ARENA Australian Solar Thermal Research Initiative (ASTRI)
Date Deposited: 20 Sep 2017 07:51
FoR Codes: 10 TECHNOLOGY > 1003 Industrial Biotechnology > 100302 Bioprocessing, Bioproduction and Bioproducts @ 100%
SEO Codes: 85 ENERGY > 8505 Renewable Energy > 850501 Biofuel (Biomass) Energy @ 100%
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