128102 20241125101201.0 doi 10.1016/j.energy.2023.128559 sideral 135262 ART-2023-135262 eng Díez, Luis I. Universidad de Zaragoza (orcid)0000-0003-4304-6685 Oxy-combustion characteristics of torrefied biomass and blends under O2/N2, O2/CO2 and O2/CO2/H2O atmospheres 2023 Access copy available to the general public Unrestricted The combined use of bio-fuels along with CO2 capture techniques is the basis for the so-called negative emissions energy systems. In this paper, oxy-fuel combustion of two torrefied biomasses is experimentally investigated in a lab-scale entrained flow reactor. The torrefied biomasses are fired alone, and co-fired with coal (50%). Two oxygen concentrations (21% and 35%) and four steam concentrations are tested: 0% (dry recycle oxy-combustion), 10% (wet recycle oxy-combustion), 25% and 40% (towards the concept of oxy-steam combustion). The tests are designed to get the same mean residence time for all the fuels and conditions. Burnout degrees are significantly increased (up to 9 and 16 percentage points) when the share of torrefied biomass is raised, with a slightly better behavior of the torrefied pine in comparison to the torrefied agro-biomass. C-fuel conversion to CO2 follows a similar trend to the observed for the burnout degrees. NO formation rates are reduced when oxy-firing torrefied biomass alone in comparison to the blends, with maximum diminutions of 16.9% (torrefied pine) and 8.5% (torrefied agro-biomass). As regards the effect of steam, the best results are found for the 25% H2O atmospheres in most of the cases, yielding maximum conversions along with minimum NO levels. info:eu-repo/grantAgreement/ES/MICINN/RTI2018-094488 info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 9.0 2023 THERMODYNAMICS 3 / 78 = 0.038 2023 Q1 T1 ENERGY & FUELS 24 / 171 = 0.14 2023 Q1 T1 2.11 2023 Electrical and Electronic Engineering 2023 Q1 Energy (miscellaneous) 2023 Q1 Energy Engineering and Power Technology 2023 Q1 Building and Construction 2023 Q1 Civil and Structural Engineering 2023 Q1 Renewable Energy, Sustainability and the Environment 2023 Q1 Industrial and Manufacturing Engineering 2023 Q1 Management, Monitoring, Policy and Law 2023 Q1 Mechanical Engineering 2023 Q1 Modeling and Simulation 2023 Q1 Pollution 2023 Q1 Fuel Technology 2023 Q1 15.3 2023 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion García-Mariaca, Alexander Universidad de Zaragoza (orcid)0000-0003-2484-2504 Canalís, Paula Universidad de Zaragoza (orcid)0000-0002-5037-7047 Llera, Eva Universidad de Zaragoza (orcid)0000-0002-6103-7136 5004 545 Universidad de Zaragoza Dpto. Ingeniería Mecánica Área Ingeniería Mecánica 5004 590 Universidad de Zaragoza Dpto. Ingeniería Mecánica Área Máquinas y Motores Térmi. 284 (2023), 128559 [11 pp.] Energy Energy 0360-5442 1489323 http://zaguan.unizar.es/record/128102/files/texto_completo.pdf Versión publicada 2598547 http://zaguan.unizar.es/record/128102/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:128102 articulos driver 2024-11-22-12:11:40 ARTICLE