Analysis of the pyrolysis kinetics of wastewater-fed microalgal biomass by a parallel order-based reaction model
- Asensio, Isaac Alonso 12
- García, Marcos Frías 3
- González Díaz, Eduardo 4
- Díaz, Oliver 5
-
González, Enrique
5
- Vera, Luisa 5
- 1 Instituto De Astrofísica De Canarias , La Laguna, Spain
- 2 Departamento De Astrofísica, Universidad De La Laguna , La Laguna, Spain
- 3 Servicio General De Apoyo a La Investigación (SEGAI), Universidad De La Laguna , La Laguna, Spain
- 4 Departamento De Técnicas Y Proyectos En Ingeniería Y Arquitectura, Universidad De La Laguna , La Laguna, Spain
- 5 Departamento De Ingeniería Química Y TF, Universidad De La Laguna , La Laguna, Spain
ISSN: 1556-7036, 1556-7230
Año de publicación: 2020
Páginas: 1-14
Tipo: Artículo
Otras publicaciones en: Energy Sources, Part A: Recovery, Utilization, and Environmental Effects
Objetivos de desarrollo sostenible
Resumen
Wastewater-fed microalgal biomass has attracted a considerable interest for biofuel production via pyrolysis in recent years. In this study, thermal degradation behavior and pyrolysis kinetic parameters have been investigated by non-isothermal thermogravimetric analysis. Analysis of the reactive phase showed two partially overlapping devolatilization stages, with degradation peaks at 540–570 K, accompanied by a shoulder at around 590–615 K, and 735–785 K, respectively. Model-free kinetic methods showed a large variation in the activation energy with the conversion degree, suggesting a multi-step reaction scheme. Consequently, a parallel order-based reaction model of three pseudo-components (proteins, carbohydrates and lipids) was applied, showing a good agreement with the experimental data. Based on this approach, the average activation energies were 143, 166 and 61 kJ·mol−1 for proteins, carbohydrates and lipids, respectively, while the average orders of reaction were 2.3, 1.6 and 0.6.
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