Integration of decentralized torrefaction with centralized catalytic pyrolysis to produce green aromatics from coffee grounds

Li Chai, Christopher M. Saffron, Yi Yang, Zhongyu Zhang, Robert W. Munro, Robert M. Kriegel

    Research output: Research - peer-reviewArticle

    • 1 Citations

    Abstract

    The aim of this work was to integrate decentralized torrefaction with centralized catalytic pyrolysis to convert coffee grounds into the green aromatic precursors of terephthalic acid, namely benzene, toluene, ethylbenzene, and xylenes (BTEX). An economic analysis of this bioproduct system was conducted to examine BTEX yields, biomass costs and their sensitivities. Model predictions were verified experimentally using pyrolysis GC/MS to quantify BTEX yields for raw and torrefied biomass. The production cost was minimized when the torrefier temperature and residence time were 239 °C and 34 min, respectively. This optimization study found conditions that justify torrefaction as a pretreatment for making BTEX, provided that starting feedstock costs are below $58 per tonne.

    LanguageEnglish (US)
    Pages287-292
    Number of pages6
    JournalBioresource Technology
    Volume201
    DOIs
    StatePublished - Feb 1 2016

    Profile

    Coffee
    Xylenes
    Toluene
    Benzene
    Pyrolysis
    ethylbenzene
    Ethylbenzene
    Xylene
    BTEX
    coffee
    pyrolysis
    Costs
    Biomass
    biomass
    cost
    Economic analysis
    Feedstocks
    Temperature
    terephthalic acid
    Acids

    Keywords

    • Aromatics
    • Biomass
    • Catalysis
    • Pyrolysis
    • Torrefaction

    ASJC Scopus subject areas

    • Bioengineering
    • Environmental Engineering
    • Waste Management and Disposal

    Cite this

    Integration of decentralized torrefaction with centralized catalytic pyrolysis to produce green aromatics from coffee grounds. / Chai, Li; Saffron, Christopher M.; Yang, Yi; Zhang, Zhongyu; Munro, Robert W.; Kriegel, Robert M.

    In: Bioresource Technology, Vol. 201, 01.02.2016, p. 287-292.

    Research output: Research - peer-reviewArticle

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