The share of renewable energy sources (RES) in energy production processes is growing every day in many countries. Globally, there is a very pronounced tendency to eliminate fossil fuels for energy production, which are replaced by RES. The path to decarbonization involves the successive reduction of fossil fuels and their replacement by RES. One of the possibilities of using RES, which could be used in co-firing processes with coal, is biomass obtained from fast-growing woody species, such as poplars and willows. Willows, as effective hyperaccumulators of heavy metals, successfully remediate the soil, producing biomass that can be used in energy production, both independently and through co-firing with coal. The aim of this paper is to determine the energy potential of contaminated willow biomass, as well as to determine the most favourable type of willow that would be used to improve the calorific value of lignite in cofiring processes, in different percentage ratios. The biomass obtained from willows contaminated with heavy metals (Cd, Cu, Cr, Ni, Pb and As) is characterized by a higher calorific value than the value of the examined lignite samples. Two types of willows, basket willow (Salix viminalis) and white willow (S. alba), clone B-44, as well as three coal samples, sampled from three different locations in Kolubara Mining Basin, Elektroprivreda Srbije AD, were examined. The obtained results indicate the dependence of the calorific value of lignite on the coal deposit, while the calorific value of willow depends on the type of willow. White willow (clone B-44) has a higher energy potential than basket willow, and co-firing processes are economically justified, if lower percentage ratios (about 10%) of biomass were used. Uvećanje procenta upotrebe obnovljivih izvora energije (OIE) u procesima proizvodnje energije svakim danom raste u mnogim zemljama. U svetu je veoma izražena tendencija eliminacije fosilnih goriva za proizvodnju energije, čiju supstituciju vrše OIE. Put ka dekarbonizaciji uključuje sukcesivno umanjivanje fosilnih goriva i njihovu zamenu OIE. Jedna od mogućnosti upotrebe OIE, koja bi mogla da se koristi u procesima kosagorevanja sa ugljem, predstavlja biomasa dobijena od brzorastućih drvenastih vrsta, kao što su topole i vrbe. Vrbe, kao dobri hiperakumulatori teških metala, uspešno vrše rekultivaciju zemljišta, proizvodeći biomasu koja se može upotrebiti u proizvodnji energije, kako samostalno, tako i kroz kosagorevanje sa ugljem. Cilj ovog rada je utvrđivanje energetskog potencijala biomase kontaminiranih vrba, kao i utvrđivanje najpovoljnije vrste vrba koja bi se koristila za poboljšanje kalorijske vrednosti lignita u procesima kosagorevanja, u različitim procentualnim odnosima. Biomasu, dobijenu od vrba kontaminiranim teškim metalima (Cd, Cu, Cr, Ni, Pb i As), karakteriše veća kalorijska vrednost od vrednosti ispitivanih uzoraka lignita. Ispitivane su dve vrste vrba, košarasta vrba (Salix viminalis) i bela vrba (S. alba), klon B-44, kao i tri uzorka uglja, uzorkovana sa tri različita lokaliteta u RB Kolubara, Elektroprivreda Srbije AD. Dobijeni rezultati ukazuju na zavisnost kalorijske vrednosti lignita od ležišta uglja, dok je kalorijska vrednost vrba zavisna od vrste vrba. Bela vrba (klon B-44) ima veći energetski potencijal od košaraste vrbe, a procesi kosagorevanja su ekonomski opravdani, ukoliko bi se koristili manji procentualni odnosi (oko 10%) biomase. Urošević, Jelena Stanković, Dragica Trivan, Goran Jović, Đorđe Orlović, Saša Braunović, Sonja Jovanović, Filip https://unilib.phaidrabg.rs/o:6871 doi:10.5937/SustFor2490199U ISSN: 1821-1046 Институт за шумарство, Београд, Србија info:eu-repo/semantics/article http://creativecommons.org/licenses/by/4.0/legalcode CO-FIRING OF CONTAMINATED WILLOW BIOMASS (SALIX L.) WITH LIGNITE IN THE ENERGY PRODUCTION PROCESS KOSAGOREVANJE KONTAMINIRANE BIOMASE VRBA (SALIX L.) SA LIGNITOM U PROCESU PROIZVODNJE ENERGIJE eng srp application/pdf 821630 bytes Sustainable Forestry: Collection volume: 89-90 startpage: 199 endpage: 210 2024 heavy metals, willows, coal, co-firing, energy potential teški metali, vrbe, ugalj, kosagorevanje, energetski potencijal