Combustion Performance of Torrefied Coffee Parchment Briquettes: Effects of Particle Size and Briquetting Pressure
DOI:
https://doi.org/10.32734/dinamis.v13i1.19759Keywords:
Coffee husk briquettes, coffee skin, combustion characteristics, TorefactionAbstract
A substantial amount of coffee plantation waste is generated in Aceh highland, yet
its utilization remains limited. Most of the wastes are dumped on the ground, while
coffee parchment is often burned without further application. This study explores
the conversion of coffee parchment into briquettes, focusing on their combustion
characteristics. The parchment were subjected to torrefaction process at
temperatures ranging from 240°C to 270°C and then ground to particle sizes of 40,
60, and 80 mesh. Briquettes were formed using 10% tapioca flour as a binder and
compressed simultaneously for 20 pieces of briquettes at pressures of 300, 400,
and 500 kg/cm². The resulting briquettes, with dimensions of 37×28×28 mm,
exhibited a density of 0.63 g/cm³ and a combustion rate of 0.37 g/min, enabling a
burn duration of up to 105 minutes and a peak temperature of 435°C. The best
performance was achieved using a particle size of 60 mesh and a compaction
pressure of 400 kg/cm². These findings demonstrate the potential of coffee
parchment as a viable source of solid fuel for heating applications.
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