Contribution to the research on wood pellet characteristics from Turopolje area

Šafran, Branimir; Jug, Matija; Radmanović, Kristijan; Hasan, Marijan; Augustinović, Kristijan; Vučković, Krešimir; Risović, Stjepan

doi:10.31298/sl.142.3-4.3

Cited by 2 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Apart from the naturally occurring negative effect of the present tree parts that contain significant amounts of leaves/needles or the unfavorable bark-to-wood ratio, common, for e.g., in the raw material originating from the SRC [39,40], the final product ash content can be negatively affected by inorganic matter (e.g., dirt, sand) contamination during the harvesting process [41] or by organic matter deterioration during storage [17]. Positive effects can be achieved by proper raw material manipulation; for instance, by seasoning of forest residues to lower the amount of foliage [20] or by debarking of the raw material prior to grinding, drying, and palletizing [42], which is a common practice of the quality upgrade in pellet production process when energy roundwood is used as raw material [43].…”

Section: Introductionmentioning

confidence: 99%

Variability of Normative Properties of Wood Chips and Implications to Quality Control

et al. 2021

Self Cite

View full text Add to dashboard Cite

The research was conducted with the goal to determine the variability of the quality parameters of the wood chips produced from the most favorable raw material (energy roundwood), and in the most controllable operational conditions (pellet factory), as the first step in identifying opportunities to optimize the wood chips’ quality monitoring. Four raw material types were tested: fir/spruce and beech debarked energy roundwood, as well as energy wood with bark of the same species. Sampling was conducted during six consecutive months along with laboratory testing, all according to the HRN EN ISO standards for solid biofuels. Interpretation of the results was done in relation to deviation from the first sampling results (as an indicator of the possibility to retain the quality of wood chips), and repeatability and reproducibility set in the standards (as an indicator of acceptable variability). The influence of the species and debarking process on the wood chips’ quality was analyzed as well. Relative deviation from the first sampling as well as the quality class change pointed moisture content as a normative property with the lowest possibility to retain initial values over the six-month period. Ash content results indicated a strong possibility to maintain the initial ash content class in the majority of the samples. In just three cases, the results of ash content were outside the reproducibility limits with first sampling as a reference. Gross calorific value results pointed only four samples outside the reproducibility limits with the first sampling results are set as a reference. Wood species influenced gross calorific value and the median value of the particle size distribution and debarking showed a significant positive effect on the moisture content reduction as well as on the ash content reduction. Presented findings are indicative for the investigated raw materials, however for the general conclusion on the subject of wood chips normative properties variation, various raw material types will have to be examined in further research.

show abstract

Section: Introductionmentioning

confidence: 99%

Variability of Normative Properties of Wood Chips and Implications to Quality Control

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

The Effects of Demineralization on Reducing Ash Content in Corn and Soy Biomass with the Goal of Increasing Biofuel Quality

Kukuruzović¹,

Matin

Kontek

et al. 2023

Energies

View full text Add to dashboard Cite

The increasing amount of residual waste presents several opportunities to use biomass as a renewable energy source. Agricultural biomass is a raw material with a high ash content, which can be a problem in any form of energy conversion. To obtain better quality biofuel, excess mineral matter must be removed. Demineralization is a simple form of mixing and washing biomass with various liquids to reduce ash content. Water, acetic acid, hydrochloric acid and nitric acid are common solvents used for this purpose. Ash is composed of different micro (Zn, Cu, Fe) and macro elements (Mg, Ca, K), which can have different consequences for the use of biomass for thermal energy. Different solvents have different effects on the individual elements, with inorganic acids having the greatest effect in demineralization processes, with a reduction in ash content of up to 80% for corn and about 99% for soybeans.

show abstract

Contribution to the research on wood pellet characteristics from Turopolje area

Cited by 2 publications

References 0 publications

Variability of Normative Properties of Wood Chips and Implications to Quality Control

Variability of Normative Properties of Wood Chips and Implications to Quality Control

The Effects of Demineralization on Reducing Ash Content in Corn and Soy Biomass with the Goal of Increasing Biofuel Quality

Contact Info

Product

Resources

About