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Progress and challenges in valorisation of biomass waste from ornamental trees pruning through pyrolysis processes. Prospects in the bioenergy sector.
Taboada-Ruiz, L; Pardo, R; Ruiz, B; Díaz-Somoano, M; Calvo, L F; Paniagua, S; Fuente, E.
Affiliation
  • Taboada-Ruiz L; Biocarbon, Circularity and Sustainability Group (BC&S), Instituto de Ciencia y Tecnología del Carbono (INCAR), CSIC, C/ Francisco Pintado Fe, 26, 33011, Oviedo, Spain.
  • Pardo R; Biocarbon, Circularity and Sustainability Group (BC&S), Instituto de Ciencia y Tecnología del Carbono (INCAR), CSIC, C/ Francisco Pintado Fe, 26, 33011, Oviedo, Spain.
  • Ruiz B; Biocarbon, Circularity and Sustainability Group (BC&S), Instituto de Ciencia y Tecnología del Carbono (INCAR), CSIC, C/ Francisco Pintado Fe, 26, 33011, Oviedo, Spain.
  • Díaz-Somoano M; Biocarbon, Circularity and Sustainability Group (BC&S), Instituto de Ciencia y Tecnología del Carbono (INCAR), CSIC, C/ Francisco Pintado Fe, 26, 33011, Oviedo, Spain.
  • Calvo LF; Department of Chemistry and Applied Physics, Chemical Engineering Area, IMARENABIO, University of León, Avda. Portugal 41, 24071, León, Spain.
  • Paniagua S; Institute of Sustainable Processes (ISP), University of Valladolid, Dr. Mergelina s/n, Valladolid, 47011, Spain; Department of Applied Physics, Faculty of Sciences, University of Valladolid, Paseo Belén 7, Valladolid, 47011, Spain.
  • Fuente E; Biocarbon, Circularity and Sustainability Group (BC&S), Instituto de Ciencia y Tecnología del Carbono (INCAR), CSIC, C/ Francisco Pintado Fe, 26, 33011, Oviedo, Spain. Electronic address: enriquef@incar.csic.es.
Environ Res ; 249: 118388, 2024 May 15.
Article in En | MEDLINE | ID: mdl-38331149
ABSTRACT
Nowadays, the scarcity of energy resources is promoting the search for alternative energy sources, boosting interest in the use of forest lignocellulosic residue in the energy sector. In this study, the focus is on the energy recovery from two lignocellulosic residues originated during the pruning of ornamental trees (Horse Chestnut, CI, and False Acacia, FA). Both conventional and flash pyrolysis techniques were applied. The experimental pyrolysis variables were obtained from the study of the thermal behaviour of the pruning residues in thermogravimetric analysis. It was carried out under 5 heating rates and kinetic parameters were estimated using Flynn-Wall-Ozawa method. Results denoted higher maximum mass loss rate values for the same release temperature regions under FA experiments. Also, FA samples had lower final residues for the processes. However, activation energy values were so close for both species. FA was also linked to the faster reactions according frequency factor outcomes. Conventional pyrolysis of pruning residues was carried out in a horizontal oven of original design at a heating rate of 25 °C/min, at 750 °C and 60 min of permanence at that temperature; flash pyrolysis was tested in that oven at 750 and 850 °C. In these pyrolysis processes, three fractions were obtained bio-char, bio-oil and gas. The physicochemical attributes of the bio-chars suggested their potential utility as biofuels (28.4-29.8 MJ/kg), adsorbent precursors or soil additives. Conventional pyrolysis bio-oils had a dominant monoaromatic hydrocarbons nature, with phenols being the most abundant (≥60%), while flash bio-oils contain mainly polycyclic aromatic hydrocarbons. Conventional pyrolysis gases contained up to 60 vol% of CO2; flash pyrolysis gases had high combustible gas content (CO, CH4, H2) and a low CO2 content (<25 vol%). As a result, their calorific value (18.06 MJ/kg) exhibited a threefold increase compared to the gas produced through conventional pyrolysis (6.04 MJ/kg).
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Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Pyrolysis / Biomass / Biofuels Language: En Journal: Environ Res Year: 2024 Type: Article Affiliation country: Spain

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Pyrolysis / Biomass / Biofuels Language: En Journal: Environ Res Year: 2024 Type: Article Affiliation country: Spain