Naslov
SELECTED PHYSICAL AND CHEMICAL PROPERTIES OF WOOD CHIPS PRODUCED IN SELECTIVE AND SALVAGE FELLINGS OF NORWAY SPRUCE (PICEA ABIES (L.) KARST.)

Autori
Ursić, Branko ; Vusić, Dinko ; Lovrinčević, Mihael ; Papa, Ivica ; Franjević, Milivoj ; Đuka, Andreja

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
NATURAL RESOURCES, GREEN TECHNOLOGY AND SUSTAINABLE DEVELOPMENT / Radojčić Redovniković, Ivana ; Jakovljević, Tamara ; Stojaković, Renata ; Erdec, Dina ; Panić, Manuela ; Damjanović, Anja ; Radošević, Kristina, Cvjetko Bubalo, Marina - Zagreb : Prehrambeno-biotehnološki fakultet Sveučilišta u Zagrebu, 2022, 30-35

Skup
4th Natural resources, green technology and sustainable development/4 (GREEN2022)

Mjesto i datum
Zagreb, Hrvatska, 14.09.2022. - 16.09.2022

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
physical analyses, elemental analyses, wood decay

Sažetak
After the tree dies, wood degradation starts, caused by different biological organisms, which results in changes in wood’s physical and chemical properties. The physical and chemical properties of solid biofuels are correlated with the material type they were produced of. For example, the content of some chemical elements depends on tree species ; ash content depends on bark content, etc. This research aims to determine the correlation between physical and chemical wood chips properties and material types. Wood chips were produced from two material types, from the area of the Forest Administration Delnice. The first material type was pulpwood produced from dead Norway spruce (Picea abies (L.) Karst.) trees from salvage felling, and the second material type was pulpwood produced from healthy Norway spruce trees from selective felling. Laboratory analyses were done according to the HRN EN ISO standards. Values of moisture, ash, carbon, hydrogen, nitrogen and sulphur content and particle size distribution were determined. The moisture content was 44.4% for healthy spruce trees, which is significantly higher than the 27.3% that was determined for dead spruce trees. The ash content of dead trees was 0.44% (due to the lower bark content) which is more favourable (because of lower bark content) than the significantly higher ash content of 0.75% of healthy trees. The average share of carbon content was 50.54±0.13 % for dead trees and 50.78±0.38 % for healthy trees. The absence of statistically significant differences for some parameters is likely caused by in-material variability. In addition, for some purposes, that would be more useful to present results in absolute values (for example, carbon content), including possible wood matter losses.

Izvorni jezik
Engleski

Znanstvena područja
Šumarstvo, Biotehnologija

POVEZANOST RADA