Nascimento, M.Silva, F.Pilão, R.M.Neto, M.P.Ribeiro, A.M.2024-05-022024-05-022023Nascimento, M., Silva, F., Pilão, R., Neto, M.P., & Ribeiro, A.M. (2023). Influence of the operating temperature on the slow pyrolysis of pinecones. In C. Vilarinho, F. Castro, & M.J. Quina, WASTES: Solutions, Treatments and Opportunities: Selected papers from the 6th International Conference Wastes 2023, 6 – 8 September 2023, Coimbra, Portugal. Taylor & Francis Group9781003345084http://hdl.handle.net/10400.22/25430This work was supported by the Fundação para a Ciência e a Tecnologia - SFRH/BD/137913/2018.This study investigated the production of biochars, bio-oils and non-condensable gas from pinecones through pyrolysis. The effect of temperature on the yields of the three phases and their characterization was studied. Char yield varied from 39.7 to 29.5 % and gas yield increased from 22.1 to 33.9 % as temperature rose from 408 to 661 ºC. Bio-oil yield increased from 38.3% at 408 ºC to 39.9 % at 562 ºC and then decreased to 36.6 % at 661 ºC. The chars obtained had an ash content between 1.38 and 2.20 %, volatiles in the range of 3.90 to 22.99 %, fixed carbon from 75.23 to 94.72 % and a higher heating value (HHV) in the range of 28.81 to 31.63 MJ.kg-1. The gas phase was mainly composed of carbon dioxide (CO2), carbon monoxide (CO), methane (CH4) and hydrogen (H2).engBiochars productionBio-oils productionNon-condensable gasPyrolysis processbook part