Oxy-combustion characteristics of torrefied biomass and blends under O2/N2, O2/CO2 and O2/CO2/H2O atmospheres

Díez, Luis I. (Universidad de Zaragoza) ; García-Mariaca, Alexander (Universidad de Zaragoza) ; Canalís, Paula (Universidad de Zaragoza) ; Llera, Eva (Universidad de Zaragoza)

Resumen: 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.

Idioma: Inglés

DOI: 10.1016/j.energy.2023.128559

Año: 2023

Publicado en: Energy 284 (2023), 128559 [11 pp.]
ISSN: 0360-5442

Factor impacto JCR: 9.0 (2023)

Categ. JCR: THERMODYNAMICS rank: 3 / 78 = 0.038 (2023) - Q1 - T1
Categ. JCR: ENERGY & FUELS rank: 24 / 171 = 0.14 (2023) - Q1 - T1

Factor impacto CITESCORE: 15.3 - Pollution (Q1) - Renewable Energy, Sustainability and the Environment (Q1) - Modeling and Simulation (Q1) - Management, Monitoring, Policy and Law (Q1) - Civil and Structural Engineering (Q1) - Industrial and Manufacturing Engineering (Q1) - Energy (all) (Q1) - Electrical and Electronic Engineering (Q1) - Mechanical Engineering (Q1) - Energy Engineering and Power Technology (Q1) - Fuel Technology (Q1) - Building and Construction (Q1)

Factor impacto SCIMAGO: 2.11 - Electrical and Electronic Engineering (Q1) - Energy (miscellaneous) (Q1) - Energy Engineering and Power Technology (Q1) - Building and Construction (Q1) - Civil and Structural Engineering (Q1) - Renewable Energy, Sustainability and the Environment (Q1) - Industrial and Manufacturing Engineering (Q1) - Management, Monitoring, Policy and Law (Q1) - Mechanical Engineering (Q1) - Modeling and Simulation (Q1) - Pollution (Q1) - Fuel Technology (Q1)

Financiación: info:eu-repo/grantAgreement/ES/MICINN/RTI2018-094488

Tipo y forma: Article (Published version)

Área (Departamento): Área Ingeniería Mecánica (Dpto. Ingeniería Mecánica)
Área (Departamento): Área Máquinas y Motores Térmi. (Dpto. Ingeniería Mecánica)