Submitted: February 1st, 2021 ; Accepted: March 30th, 2021 ; Published: May 21st, 2021 ; Correspondence: [email protected] coffee production chain is a potential source of residual biomass inherent to the
high productivity that can contribute to the generation of value-added products. The residues from
the coffee sector are typically disposed to landfill without treatment causing potential
environmental inconveniences. Briquetting presents an alternative process to produce a uniform
fuel with high energy density. Briquettes facilitates easy transportation, enables better handling
and storage of biomass residues. Properties such as low equilibrium moisture content, high energy
density and compressive strength were reported for different coffee-pine wood briquettes
treatments. Moreover, understanding of the thermal properties of the briquettes during
combustion is crucial to evaluate their final application. This research is the first study that
investigates the combustibility properties and kinetic parameters of the thermal decomposition of
briquettes from coffee-pine wood using differential and integral thermal analysis under
non-isothermal conditions. Multivariate analysis of the collected parameters through principal
components analysis (PCA), was implemented to reduce the dimensionality of the data.
The desired profile in the combustibility is directly related to high temperatures and long burning
times, thus, the tested briquettes displayed a significant combustibility potential, reporting peak
temperatures and burnout times around 600 °C and 27 minutes, respectively. Activation energy
kinetic parameter in the range of 12–42 kJ mol-1
and average reactivity of 0.14–0.22 min-1
, were
also found. The results revealed the not thermally hard material to degrade when compared to
biomasses typically used for combustion