{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,26]],"date-time":"2026-04-26T04:16:01Z","timestamp":1777176961146,"version":"3.51.4"},"reference-count":26,"publisher":"MDPI AG","issue":"14","license":[{"start":{"date-parts":[[2022,7,20]],"date-time":"2022-07-20T00:00:00Z","timestamp":1658275200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"FCT\u2014Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia within the R&amp;D Units","award":["UIDB\/04077\/2020"],"award-info":[{"award-number":["UIDB\/04077\/2020"]}]},{"name":"Fundo de Desenvolvimento Capital Humano of the Government of Timor Leste","award":["UIDB\/04077\/2020"],"award-info":[{"award-number":["UIDB\/04077\/2020"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Energies"],"abstract":"<jats:p>Studying the thermal decomposition of wood pellets is an important subject in order to understand the behavior of wood pellets during the combustion process. In fact, wood pellets have become an important fuel used in boiler combustion. The objective of this study is to investigate the mass loss and elemental analysis of pine wood pellets at various times and temperatures. Commercial pellets with a diameter of 6 mm were used. The experiment was conducted in the laboratory of the Engineering University of Minho. The pellets were burned in a small reactor of 1.36 kW with a maximum temperature range of 1150 \u00b0C. The data were observed at different temperatures: 264, 351, 444, 541, 650, and 734 \u00b0C, and at time intervals of 30, 60, 120, 180, 240, 300, 600, 900, 1200, and 3600 s. The results of the experiment revealed that the reaction rate increases with the temperature, and the higher the combustion temperature applied, the higher the mass loss of all substances observed. The remaining mass, as fixed carbon and ash or unburned substances, is about 3%. The residence time and temperature influence the species concentration of wood pellets.<\/jats:p>","DOI":"10.3390\/en15145253","type":"journal-article","created":{"date-parts":[[2022,7,20]],"date-time":"2022-07-20T11:22:24Z","timestamp":1658316144000},"page":"5253","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["Study of Mass Loss and Elemental Analysis of Pine Wood Pellets in a Small-Scale Reactor"],"prefix":"10.3390","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2276-0153","authenticated-orcid":false,"given":"Lelis Gonzaga","family":"Fraga","sequence":"first","affiliation":[{"name":"Faculty of Engineering Science and Technology, Universidade Nacional Timor Lorosa\u2019e, Rua Formosa 10, D\u00edli 314, Timor-Leste"},{"name":"Metrics I&D Centre, School of Engineering, University of Minho, 4800-058 Guimar\u00e3es, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3518-7111","authenticated-orcid":false,"given":"Jo\u00e3o","family":"Silva","sequence":"additional","affiliation":[{"name":"Metrics I&D Centre, School of Engineering, University of Minho, 4800-058 Guimar\u00e3es, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8459-1837","authenticated-orcid":false,"given":"Jos\u00e9 Carlos","family":"Teixeira","sequence":"additional","affiliation":[{"name":"Metrics I&D Centre, School of Engineering, University of Minho, 4800-058 Guimar\u00e3es, Portugal"}]},{"given":"Manuel E. C.","family":"Ferreira","sequence":"additional","affiliation":[{"name":"Metrics I&D Centre, School of Engineering, University of Minho, 4800-058 Guimar\u00e3es, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7464-3944","authenticated-orcid":false,"given":"Senhorinha F.","family":"Teixeira","sequence":"additional","affiliation":[{"name":"Algoritmi I&D Centre, School of Engineering, University of Minho, 4800-058 Guimar\u00e3es, Portugal"}]},{"given":"C\u00e2ndida","family":"Vilarinho","sequence":"additional","affiliation":[{"name":"Metrics I&D Centre, School of Engineering, University of Minho, 4800-058 Guimar\u00e3es, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0940-519X","authenticated-orcid":false,"given":"Maria Margarida","family":"Gon\u00e7alves","sequence":"additional","affiliation":[{"name":"Faculty of Science and Technology, University of New Lisbon, 1099-085 Lisbon, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2022,7,20]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"305","DOI":"10.1016\/j.energy.2016.02.132","article-title":"A study on the effect of tar fouled on thermal efficiency of a wood pellet boiler: A performance analysis and simulation using Computation Fluid Dynamics","volume":"103","author":"Euh","year":"2016","journal-title":"Energy"},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Gonzaga Fraga, L., Carlos, F., Teixeira, J., and Eduardo, C. (2019). Ferreira, M. The potential of renewable energy in Timor-Leste: An assessment for biomass. Energies, 12.","DOI":"10.3390\/en12081441"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"64","DOI":"10.1016\/j.jaap.2016.10.021","article-title":"Characterisation of Malaysian wood pellets and rubberwood using slow pyrolysis and microwave technology","volume":"122","author":"Halim","year":"2016","journal-title":"J. Anal. Appl. Pyrolysis"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"409","DOI":"10.1016\/j.energy.2016.04.037","article-title":"Energy recovery from Tunisian agri-food wastes: Evaluation of combustion performance and emissions characteristics of green pellets prepared from tomato residues and grape marc","volume":"107","author":"Kraiem","year":"2016","journal-title":"Energy"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"93","DOI":"10.1016\/j.proeng.2016.06.445","article-title":"Effect of particle size on mechanical properties of pellets made from biomass blends","volume":"148","author":"Harun","year":"2016","journal-title":"Procedia Eng."},{"key":"ref_6","unstructured":"Fraga, L., Teixeira, J.C.F., and Ferreira, M.E.C. (2018, January 12\u201314). Technical review on biomass resource for wood pellets in Timor-Leste. Proceedings of the 3rd International Conference, Production of Scientific Knowledge in Timor-Leste, Dili, Timor-Leste."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"220","DOI":"10.1016\/j.renene.2012.09.020","article-title":"Combustion and emission characteristics of a domestic boiler fired with pellets of pine, industrial wood wastes and peach stones","volume":"51","author":"Fernandes","year":"2013","journal-title":"Renew. Energy"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"3648","DOI":"10.1016\/j.biombioe.2011.05.027","article-title":"Particle emissions from pellets stoves and modern and old-type wood stoves","volume":"35","author":"Leckner","year":"2011","journal-title":"Biomass Bioenergy"},{"key":"ref_9","unstructured":"Olsson, M. (2006). Residential Biomass Combustion\u2014Emissions of Organic Compounds to Air from Wood Pellets and Other New Alternatives. [Doctoral Thesis, Chalmers University of Technology]."},{"key":"ref_10","unstructured":"Stahl, M.K.R., Henrich, E., Gehrmann, H.J., and Vodegel, S. (2004). Definition of a standard biomass. Contract, 1\u201314. Available online: http:\/\/www.renew-fuel.com\/del_sp2_wp1_2-1-1_05-01-10-fzk7ff0.pdf?dl=del_sp2_wp1_2-1-1_05-01-10-fzk.pdf&kat=14."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"231","DOI":"10.1016\/j.scitotenv.2004.09.043","article-title":"Elemental analyses of pine bark and wood in an environmental study","volume":"343","author":"Saarela","year":"2005","journal-title":"Sci. Total Environ."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"330","DOI":"10.1016\/j.fuel.2014.03.057","article-title":"Experimentally determined storage and handling properties of fuel pellets made from torrefied whole-tree pine chips, logging residues and beech stem wood","volume":"129","author":"Agar","year":"2014","journal-title":"Fuel"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"250","DOI":"10.1016\/j.fuel.2016.09.031","article-title":"Inputs of solid-state NMR to evaluate and compare thermal reactivity of pine and beech woods under torrefaction conditions and modified atmosphere","volume":"187","author":"Melkior","year":"2017","journal-title":"Fuel"},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"145","DOI":"10.1016\/j.fuel.2014.11.023","article-title":"Experimental investigation of wood pellet swelling and shrinking during pyrolysis","volume":"142","author":"Paulauskas","year":"2015","journal-title":"Fuel"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"204","DOI":"10.1016\/j.fuproc.2015.11.016","article-title":"Alkali transformation during single pellet combustion of soft wood and wheat straw","volume":"143","author":"Steinvall","year":"2016","journal-title":"Fuel Process. Technol."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"567","DOI":"10.1016\/j.fuel.2011.09.054","article-title":"Effects of pyrolysis conditions on the heating rate in biomass particles and applicability of TGA kinetic parameters in particle thermal conversion modelling","volume":"93","author":"Mehrabian","year":"2012","journal-title":"Fuel"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"122","DOI":"10.1016\/j.fuproc.2013.04.016","article-title":"Assessment of the devolatilization behavior of fuel pellets in fluidized bed","volume":"115","author":"Miccio","year":"2013","journal-title":"Fuel Process. Technol."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"4399","DOI":"10.1016\/j.biombioe.2011.08.019","article-title":"Study of the influence of the composition of several biomass pellets on the drying process","volume":"35","author":"Ledesma","year":"2011","journal-title":"Biomass Bioenergy"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"809","DOI":"10.1016\/j.fuel.2013.09.080","article-title":"Evaluation of the combustion behaviour and ash characteristics of biomass waste derived fuels, pine and coal in a drop tube furnace","volume":"117","author":"Wang","year":"2014","journal-title":"Fuel"},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"9967","DOI":"10.1021\/acs.energyfuels.7b00516","article-title":"Effect of the Turbulence-Chemistry Interaction in Packed-Bed Biomass Combustion","volume":"31","author":"Chapela","year":"2017","journal-title":"Energy Fuels"},{"key":"ref_21","unstructured":"European Pellet Council (2018, May 17). ENplus Quality Certification Scheme Part 3: Pellet Quality Requirements. Available online: https:\/\/www.enplus-pellets.eu\/en-in\/resources-en-in\/technical-documentation-en-in.html#handbook."},{"key":"ref_22","unstructured":"Hansen, M.T., Jein, A.R., Hayes, S., and Bateman, P. (2009). English Handbook for Wood Pellet Combustion. National Energy Foundation."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"611","DOI":"10.1016\/j.pecs.2011.01.001","article-title":"Characterization and prediction of biomass pyrolysis products","volume":"37","author":"Neves","year":"2011","journal-title":"Prog. Energy Combust. Sci."},{"key":"ref_24","unstructured":"Borman, L.G., and Ragland, W.K. (1998). Combustion Engineering, McGraw-Hill."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"27","DOI":"10.1016\/j.joei.2017.12.003","article-title":"Comparative studies on the pyrolysis of cellulose, hemicellulose, and lignin based on combined kinetics","volume":"92","author":"Yeo","year":"2019","journal-title":"J. Energy Inst."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"718","DOI":"10.1016\/j.proeng.2016.06.591","article-title":"Carbon Dioxide Adsorption on Sawdust Biochar","volume":"148","author":"Madzaki","year":"2016","journal-title":"Procedia Eng."}],"container-title":["Energies"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1996-1073\/15\/14\/5253\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T23:54:31Z","timestamp":1760140471000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1996-1073\/15\/14\/5253"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2022,7,20]]},"references-count":26,"journal-issue":{"issue":"14","published-online":{"date-parts":[[2022,7]]}},"alternative-id":["en15145253"],"URL":"https:\/\/doi.org\/10.3390\/en15145253","relation":{},"ISSN":["1996-1073"],"issn-type":[{"value":"1996-1073","type":"electronic"}],"subject":[],"published":{"date-parts":[[2022,7,20]]}}}