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This paper describes the research of slow pyrolysis of firwood (Abies bornmülleriana Mattf.) sawdust by using fixed-bed reactor. The effect of temperature ranging between 350 and 600 °C on gas, liquid and solid products was examined. The maximum bio-oil yield of 45.9 % was obtained at the final pyrolysis temperature of 500 °C. The elemental analysis and heating value of bio-oil and bio-char were determined, and then the chemical composition of the bio-oil was investigated using chromatographic and spectroscopic techniques such as Gas Chromatography–Mass Spectrometry (GC/MS) and Proton Nuclear Magnetic Resonance (1H-NMR). The liquid product was mainly composed of phenolics, including 2-methoxy-phenol, 2-methyl-phenol, phenol, as well as aldeyhdes, acids, esters, alcohols and ketones. The chemical characterization has shown that the bio-oil obtained from residues of forestry production, such as firwood sawdust, can be used as an environmental feedstock, which is an ideal candidate for alternative fuels. Moreover the bio-char can be used as an energy source and active carbon.U radu je opisano istraživanje spore pirolize jelove (Abies bornmülleriana Mattf.) piljevine uz primjenu fiksnog reaktora. Analiziran je učinak temperature u rasponu od 350 do 600 °C na plinovite, tekuće i krute proizvode pirolize. Maksimalni prinos bioulja od 45,9 % dobiven je na konačnoj temperaturi pirolize od 500 °C. Napravljena je elementarna analiza i određena ogrjevna vrijednost bioulja i biougljena, a zatim je ispitan kemijski sastav bioulja uz pomoć kromatografskih i spektroskopskih tehnika kao što su plinska kromatografija i masena spektrometrija (GC/MS) te protonska nuklearna magnetska rezonancija (1H-NMR). Tekući proizvodi pirolize sastavljeni su uglavnom od fenola, uključujući 2-metoksi-fenol, 2-metil-fenol, fenol, kao i od aldehida, kiselina, estera, alkohola i ketona. Kemijska su svojstva pokazala da je bioulje dobiveno od ostataka proizvodnje u šumarstvu, poput jelove piljevine, raspoloživa sirovina iz okoliša koja je idealna za alternativna goriva. Osim toga, biougljen se može koristiti kao izvor energije i kao aktivni ugljen

Pyrolysis of Firwood (Abies bornmülleriana Mattf.) Sawdust: Characterization of Bio-Oil and Bio-Char