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

  • 2 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
Ethylbenzene
BTEX
Toluene
coffee
Xylene
Benzene
pyrolysis
Pyrolysis
Biomass
Costs
Economic analysis
biomass
production cost
economic analysis
cost
Feedstocks
residence time
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: Contribution to journalArticle

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