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

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Published: Mar 2, 2021
DOI: https://doi.org/10.2298/HEMIN191224007P
Keywords:
hot water pretreatment, chemical composition, pellet properties, heating value

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Jasmina Popović
University of Belgrade - Faculty of Forestry, Kneza Višeslava 1, 11030 Belgrade, Serbia
Mladjan Popović
University of Belgrade - Faculty of Forestry, Kneza Višeslava 1, 11030 Belgrade, Serbia
Milanka Điporović-Momčilović
University of Belgrade - Faculty of Forestry, Kneza Višeslava 1, 11030 Belgrade, Serbia
Ana Prahin
University of Belgrade - Faculty of Forestry, Kneza Višeslava 1, 11030 Belgrade, Serbia
Vladimir Dodevski
University of Belgrade - Institute of Nuclear Sciences Vinča, Mike Petrovića Alasa 12-14, P.O. Box 522, 11001 Belgrade, Serbia
Ivana Gavrilović-Grmuša
University of Belgrade - Faculty of Forestry, Kneza Višeslava 1, 11030 Belgrade, Serbia

Abstract

Particles of beech wood were treated with hot water at the temperature of 150 oC, during 60 min, prior to the pelleting process. The applied hot water pretreatment affected the chemical composition and heating value of particles. Two groups of pellets, designated as PT 10 and PT 20, were produced from treated beech particles, with the moisture content of particles being 10.5 and 20.5 %, respectively. Pellets from nontreated beech particles (PNT) served as controls to assess the hot water pretreatment effects on the pellet properties. Both, the applied pretreatment, and the particle moisture content, affected properties of the obtained pellets. The heating value of PT 10 ad PT 20 pellets has increased for ~6 and 1 %, respectively. The mineral (ash) content in treated pellets decreased for about 24 % in comparison to that in PNT pellets. In addition, the bulk (apparent) density of pellets has increased for 21 % (PT 10) and 10 % (PT 20), as a consequence of the hot water pretreatment of particles. The specific density of PT 10 pellets was for 16 % higher, while the equilibrium moisture content (after conditioning at RH 68 % and 20.1 oC) was for about 32 % lower in comparison to the respective properties of PNT pellets.

Article Details

How to Cite
[1]
J. Popović, M. Popović, M. Điporović-Momčilović, A. Prahin, V. Dodevski, and I. Gavrilović-Grmuša, “Effects of water pretreatment on properties of pellets made from beech particles”, Hem Ind, vol. 75, no. 1, pp. 39–51, Mar. 2021, doi: 10.2298/HEMIN191224007P.
Issue
Vol. 75 No. 1 (2021)
Section
Engineering of Materials - Biomaterials
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How to Cite

[1]
J. Popović, M. Popović, M. Điporović-Momčilović, A. Prahin, V. Dodevski, and I. Gavrilović-Grmuša, “Effects of water pretreatment on properties of pellets made from beech particles”, Hem Ind, vol. 75, no. 1, pp. 39–51, Mar. 2021, doi: 10.2298/HEMIN191224007P.
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