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

Chemical Industry Pub Date : 2021-03-02 DOI:10.2298/HEMIN191224007P

J. Popović, M. Popović, Milanka Djiporović-Momčilović, Ana Prahin, V. Dodevski, Ivana Gavrilović-Grmuša

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引用次数: 2

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?C) was for about 32 % lower in comparison to the respective properties of PNT pellets.

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水预处理对山毛榉颗粒制粒性能的影响

山毛榉木颗粒在150℃的温度下，在60分钟内用热水处理，然后进行造粒过程。应用热水预处理影响了颗粒的化学成分和热值。以处理过的山毛榉颗粒为原料，制备了两组颗粒，分别为PT 10和PT 20，颗粒含水量分别为10.5%和20.5%。以未经处理的山毛榉颗粒(PNT)为对照，评价热水预处理对颗粒性能的影响。所应用的预处理和颗粒含水量都影响所获得的球团的性能。PT 10和PT 20球团的热值分别提高了6%和1%。与PNT颗粒相比，处理过的颗粒中的矿物(灰分)含量降低了约24%。此外，由于颗粒的热水预处理，颗粒的体积(表观)密度增加了21% (PT 10)和10% (PT 20)。与PNT球团的性能相比，PT 10球团的比密度提高了16%，而平衡水分含量(在相对湿度为68%和20.1℃后)降低了约32%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Chemical Industry

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