Effects of water pretreatment on properties of pellets made from beech particles

Popović, Jasmina; Popović, M.; Ðiporović-Momčilović, Milanka; Prahin, Ana; Dodevski, Vladimir; Gavrilović-Grmuša, Ivana

doi:10.2298/hemin191224007p

Cited by 2 publications

(1 citation statement)

References 27 publications

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“…Increasing the rotational speed of the die from 170 to 270 rpm resulted in a decrease in the particle density of the obtained pellets, which was related to a decrease in the thickness of the pelletized material layer in one compacting cycle. Noteworthy is that the moisture content of mixtures was increasing with the decrease in senna leaves share; therefore, the moisture content could also cause a decrease in the particle density of pellets [62].…”

Section: Particle Densitymentioning

confidence: 99%

A comprehensive study of buckwheat husk co-pelletization for utilization via combustion

Yildiz

Cwalina

Obidziński

2022

Biomass Conv. Bioref.

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Buckwheat husks are a valuable source of carbon and show the potential to be used as an energy source. However, due to low bulk density and low susceptibility to compaction, it is beneficial to use them in the form of co-pellets. The study presents comprehensive research detailing buckwheat husks’ potential for co-pelletization with oily (peanut husks) and dusty (senna leaves) agri-food wastes, whereas the effect of material parameters such as the amount of additive (10, 15, 20%) and the process parameters as the die rotational speed (170, 220, 270 rpm) on pellets’ quality (kinetic durability, bulk and particle density, degree of compaction) and the energy consumption of the pelletization process were examined. Ten percent of potato pulp as a binder was added to each pelletized mixture. It was found that an increase in the senna leaf content affects positively the kinetic durability of pellets. The fatty peanut husks have a negative effect on the pellets’ quality (measured by the kinetic durability and bulk density); however, both additions of senna leaves and peanut husks are lowering the energy consumption of the pelletizer. The highest quality pellets and the addition of 10% peanut husks to buckwheat husks (kinetic durability of 96%) and 20% of senna leaves to buckwheat husks (kinetic durability of 92%) obtained at 170 rpm were subjected to combustion in a fixed-bed unit, and the content of CO, CO2, NO, SO2, HCl, and O2 in the fuel gases was measured. The emission factors were higher than the Ecodesign limitations (CO > 500 mg·Nm−3, NO > 200 mg·Nm−3). The obtained results indicate that buckwheat husks can be successfully co-pelletized with other waste biomass; however, the pellets to be combusted require a boiler with improved air-supplying construction.

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Section: Particle Densitymentioning

confidence: 99%