Bioenergy potential of red macroalgae Gelidium floridanum by pyrolysis: Evaluation of kinetic triplet and thermodynamics parameters

• Published in: Bioresource technology 2019-11, Vol.291, p.121892-121892, Article 121892
• Main Authors: Alves, José Luiz Francisco, Da Silva, Jean Constantino Gomes, da Silva Filho, Valdemar Francisco, Alves, Ricardo Francisco, Ahmad, Muhammad Sajjad, Ahmad, Muhammad Sarfraz, Galdino, Wendell Venicio de Araujo, De Sena, Rennio Felix
• Format: Article
• Language: English
• Subjects: Bioenergy; Biofuels; feedstocks; Gelidium; Gelidium floridanum; Isoconversional methods; Kinetic study; Kinetics; macroalgae; Pyrolysis; Rhodophyta - metabolism; Seaweed - metabolism; technology; thermal properties; Thermodynamic analysis; Thermodynamics
• ISSN: 0960-8524; 1873-2976
• DOI: 10.1016/j.biortech.2019.121892

•A new feedstock (Gelidium floridanum – GF) for bioenergy production.•First attempt on pyrolysis study of the Gelidium floridanum.•Thermochemical characteristics indicated that GF is suitable for pyrolysis.•Thermodynamic and kinetics analysis suggested a favorable potential for bioenergy. The aim of this study was to investigate the bioenergy potential of red macroalgae GF by evaluating its biofuel physicochemical characteristics, and conducting a kinetic study and thermodynamic analysis of pyrolysis for the first time. The thermal decomposition study was performed at low heating rates (5, 10, 20 and 30 °C min−1) under N2 atmosphere. The thermal behavior of GF pyrolysis indicated the presence of three different decomposition stages, which are associated with different components in its structure and consequently influence the kinetic and thermodynamic parameters. The kinetic triplet obtained for GF provided a suitable description of experimental thermal behavior. The thermodynamic parameters demonstrated that GF is as a new promising feedstock for bioenergy and presented a similar potential to well-known bioenergy feedstock.