University of Limerick
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Characterization of woodstove briquettes from torrefied biomass and coal

journal contribution
posted on 2023-02-20, 09:53 authored by Anna TrubetskayaAnna Trubetskaya, JAMES J LEAHYJAMES J LEAHY, Elena Yazhenskikh, Michael Müller, Peter Layden, Robert Johnson, Kenny Ståhl, Rory F.D. Monaghan
Using waste biomass materials offers the potential to reduce the greenhouse gas emissions from fossil fuels. Torrefaction is very useful for improving the fuel properties of biomass in order to better match those of coal. The aim of this work is to compare the properties of torrefied low quality biomass briquettes against coal equivalents. The composition of the briquettes was characterized by 13C CP/MAS, proximate analysis, and X-ray diffraction and the results were compared with equilibrium calculations. In addition to these techniques, we report for the first time on the use of XμCT for characterizing such materials. The XμCT analysis showed that the briquette structure contains carbon, binder and inorganic matter, with quartz retained from the original feedstock in torrefied biomass and coal briquettes. The CO2 reactivity of pulverized briquettes was investigated by thermogravimetric analysis. Results showed that the inorganic matter influences the reactivity less than the organic composition and porosity. Importantly from a technological standpoint, the increase in binder concentration and replacement of starch with resin binder did not influence the reactivity and calorific value of a pulverized briquette.



Sustainable Energy and Fuel Efficiency (SEFE)




Energy; 171, pp. 853-865





Other Funding information

SFI, Sustainable Energy and Fuel Efficiency (SEFE)


This is the author’s version of a work that was accepted for publication in Energy. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Energy,



Department or School

  • Chemical Sciences

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