Physicomechanical Properties and Calorific Value Analysis of Pine Sawdust Pellets
DOI:
https://doi.org/10.24925/turjaf.v14i4.1115-1124.8566Keywords:
Pine sawdust , Pellet , Physical properties , Moisture content , Flue gas emissionsAbstract
This study investigates the effects of material moisture content (8-10% and 10-12%), particle size (2-5 mm and 7-10 mm), and pellet diameter (6 mm and 8 mm) on the pelleting of pine sawdust, an industrial waste, by examining its physico-mechanical and thermal properties. The highest pellet bulk density was obtained with a value of 597.48 kg m⁻³ at the combination of 8-10% moisture content, 7-10 mm particle size, and 8 mm pellet diameter, while the lowest value was found at 408.02 kg m⁻³ at the same combination of 8-10% moisture content, 2-5 mm particle size, and 6 mm pellet diameter. In the mechanical strength parameter, the highest value was determined with 92.19% in the combination of 10-12% moisture content, 2-5 mm particle size, and 8 mm pellet diameter, while fracture resistance showed high values between 94.16% and 99.53% in all combinations. The highest performance in terms of desiccation resistance was obtained with 95.32% in the combination of 8-10% moisture content, 7-10 mm particle size, and 6 mm pellet diameter. When the interactive effects of the factors were examined, the highest bulk density in the material moisture × pellet diameter interaction was determined with 524.62 kg m⁻³ in the combination of 8-10% moisture content and 8 mm pellet diameter, and in the particle size × pellet diameter interaction with 543.96 kg m⁻³ in the combination of 7-10 mm particle size and 8 mm pellet diameter. Flue gas emission analyses have shown that the pellets produced meet the standards of the relevant Air Quality Control Regulation, with CO emissions remaining at 142-188 ppm, NOx emissions at 55-65 mg m⁻³, and SO₂ emissions below the detection limit.
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