Gasification Reactivity and Physicochemical Properties of the Chars from Raw and Torrefied Wood, Grape Marc, and Macroalgae

Peijun Guo, Woei L. Saw, Philip J. Van Eyk, Ellen Stechel, Rocky De Nys, Peter J. Ashman, Graham J. Nathan

    Research output: Contribution to journalArticle

    11 Scopus citations

    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°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°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.

    Original languageEnglish (US)
    Pages (from-to)2246-2259
    Number of pages14
    JournalEnergy and Fuels
    Volume31
    Issue number3
    DOIs
    StatePublished - Mar 16 2017

    ASJC Scopus subject areas

    • Chemical Engineering(all)
    • Fuel Technology
    • Energy Engineering and Power Technology

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