Low temperature chemical looping combustion of pyrolysis gases in a fixed bed reactor
Gracia-Monforte, César (Universidad de Zaragoza) ; Maldonado-Martín, Francisco (Universidad de Zaragoza) ; Atienza-Martínez, María ; Ábrego, Javier (Universidad de Zaragoza)
Resumen: 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.
Idioma: Inglés
DOI: 10.1016/j.biombioe.2025.107911
Año: 2025
Publicado en: BIOMASS & BIOENERGY 199 (2025), 107911 [9 pp.]
ISSN: 0961-9534
Financiación: info:eu-repo/grantAgreement/ES/MICINN/PDC2022-133374-I00
Tipo y forma: Article (Published version)
Área (Departamento): Área Ingeniería Química (Dpto. Ing.Quím.Tecnol.Med.Amb.)
Área (Departamento): Área Tecnologi. Medio Ambiente (Dpto. Ing.Quím.Tecnol.Med.Amb.)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes.
Exportado de SIDERAL (2025-10-17-14:24:34)
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Idioma: Inglés
DOI: 10.1016/j.biombioe.2025.107911
Año: 2025
Publicado en: BIOMASS & BIOENERGY 199 (2025), 107911 [9 pp.]
ISSN: 0961-9534
Financiación: info:eu-repo/grantAgreement/ES/MICINN/PDC2022-133374-I00
Tipo y forma: Article (Published version)
Área (Departamento): Área Ingeniería Química (Dpto. Ing.Quím.Tecnol.Med.Amb.)
Área (Departamento): Área Tecnologi. Medio Ambiente (Dpto. Ing.Quím.Tecnol.Med.Amb.)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes. Exportado de SIDERAL (2025-10-17-14:24:34)
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Articles > Artículos por área > Tecnologías del Medio Ambiente
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Record created 2025-05-30, last modified 2025-10-17