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: Contribution to journalArticle

    • 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.

    Original languageEnglish (US)
    Pages (from-to)287-292
    Number of pages6
    JournalBioresource Technology
    Volume201
    DOIs
    StatePublished - Feb 1 2016

    Profile

    Ethylbenzene
    Xylene
    Toluene
    Benzene
    BTEX
    Pyrolysis
    Costs
    pyrolysis
    Coffee
    Biomass
    coffee
    biomass
    cost
    Panthera
    Economic analysis
    Feedstocks
    Acids
    Temperature
    production cost
    economic analysis

    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: Contribution to journalArticle

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

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

    Research output: Contribution to journalArticle

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