160928 20260126150158.0 doi 10.1016/j.biombioe.2025.107911 sideral 144029 ART-2025-144029 eng Gracia-Monforte, César Universidad de Zaragoza (orcid)0009-0003-7099-4864 Low temperature chemical looping combustion of pyrolysis gases in a fixed bed reactor 2025 Access copy available to the general public Unrestricted This study presents an experimental investigation into the feasibility of oxidizing biomass pyrolysis gases at relatively low temperatures using a chemical looping combustion (CLC) approach. The application of this alternative method would enable the capture of carbon from the pyrolysis gas stream, which is currently released into the atmosphere in most pyrolysis systems, as high-purity CO2. In a fixed bed reactor, the reduction behavior of three different Cu-based oxygen carriers (OC) - pure CuO pellets, carulite and Al2O3-supported CuO - was evaluated to determine whether pyrolysis gases could be completely oxidized to CO2 and H2O within a temperature range of 600–650 °C and at weight hourly space velocities (WHSV) of 0.06–0.10 h−1. Both CuO and carulite exhibited significant amounts of unconverted pyrolysis gases even during the initial stages of the reduction experiments. In contrast, Al2O3-supported CuO emerged as the most effective material, facilitating the complete oxidation of pyrolysis gases over extended reaction times. For this oxygen carrier, a decline in the combustion efficiency was only observed at very high (90 %) reduction conversions. Reduction/oxidation cycles for this most promising material were successfully demonstrated, with the oxygen carrier showing no signs of activity loss after 10 cycles. However, carbon deposition was detected under several experimental conditions, which could potentially reduce the carbon capture efficiency of the process. info:eu-repo/grantAgreement/ES/MICINN/PDC2022-133374-I00 info:eu-repo/semantics/openAccess by-nc https://creativecommons.org/licenses/by-nc/4.0/deed.es info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Maldonado-Martín, Francisco Universidad de Zaragoza Atienza-Martínez, María (orcid)0000-0002-5047-5106 Ábrego, Javier Universidad de Zaragoza (orcid)0000-0003-4493-6540 5005 555 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Ingeniería Química 5005 790 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Tecnologi. Medio Ambiente 199 (2025), 107911 [9 pp.] Biomass bioenergy BIOMASS & BIOENERGY 0961-9534 4968317 http://zaguan.unizar.es/record/160928/files/texto_completo.pdf Versión publicada 2607076 http://zaguan.unizar.es/record/160928/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:160928 articulos driver 2026-01-26-14:59:59 ARTICLE