A1 Journal article (refereed), original research

Production and characterization of coffee-pine wood residue briquettes as an alternative fuel for local firing systems in Brazil

Open Access publication

Publication Details
Authors: Martinez Clara Lisseth Mendoza, Sermyagina Ekaterina, Carneiro Angélica de Cassia Oliveira, Vakkilainen Esa, Cardoso Marcelo
Publisher: Elsevier
Publication year: 2019
Language: English
Journal acronym: Biomass and Bioenergy
Volume number: 123
Start page: 70
End page: 77
Number of pages: 8
ISSN: 0961-9534
JUFO-Level of this publication: 2
Open Access: Open Access publication
Location of the parallel saved publication: http://urn.fi/URN:NBN:fi-fe2019111943205


In this work, the production viability, physical, chemical and mechanical properties of briquettes produced from mixtures of coffee shrub residues and pinewood, were evaluated. The densification was carried out under constant operating conditions (temperature of 120 °C, pressure of 8.27 MPa) in a piston-press type laboratory-scale briquetting machine. Coffee shrub residues were mixed with pinewood in ratios of 25%, 50% and 75%. In addition, reference briquettes of pure pinewood and of each type of coffee shrub residue were produced. To characterize the raw material, ash content, volatile matter, fixed carbon together with the calorific value of produced samples, were measured. To characterize the suitability of the briquettes produced: apparent density, energy density, tensile strength, and equilibrium moisture content were determined. The highest values of energy density (19133–19899 MJ m−3), tensile strength (415–569 kgf), apparent density (1107–1163 kg m−3) and favorable values of equilibrium moisture content (9–11 wt %) were obtained from a mixing ratio of 75% of pinewood. The novel contribution of this research was to develop briquettes with appropriate physical and mechanical parameters from new raw materials that could serve as sustainable fuel sources for local firing systems.

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Last updated on 2020-20-03 at 10:03