Non-isothermal kinetics evaluation of buriti and inaja seed biomass waste for pyrolysis thermochemical conversion technology

• Published in: Biomass conversion and biorefinery 2023-08, Vol.13 (12), p.10893-10909
• Main Authors: Santos, Vanuza O., Araujo, Rayanne O., Ribeiro, Flaviana C. P., Queiroz, Leandro S., Guimarães, Mariana N., Colpani, Daiara, da Costa, Carlos E. F., Chaar, Jamal S., de Souza, Luiz K. C.
• Format: Article
• Language: English
• Subjects: Aldehydes; Biotechnology; Calorific value; Carboxylic acids; Energy; Esters; Evolution; Inert atmospheres; Lignocellulose; Mass spectrometry; Original Article; Parameters; Pyrolysis; Reaction mechanisms; Renewable and Green Energy; Seeds; Thermodynamics; Thermogravimetric analysis; Thermogravimetry
• ISSN: 2190-6815; 2190-6823
• DOI: 10.1007/s13399-021-01922-y

In this study, the energy potential of buriti ( Mauritia flexuosa L. f.) and inaja ( Attalea maripa Aubl. Mart.) seeds for pyrolysis was evaluated via thermogravimetric analysis in the temperature range of 30–900 °C at heating rates of 5, 10, 15, and 20 °C min −1 in an inert atmosphere. Five isoconversional methods were used, i.e., Ozawa-Flynn-Wall, Kissinger–Akahira–Sunose, Starink, Tang, and Vyazovkin, to determine the kinetic and thermodynamic parameters. The mean activation energies were 146.84, 144.99, 144.21, 145.28, and 145.36 kJ mol −1 for the buriti seed and 115.88, 112.01, 111.52, 112.37, and 112.38 kJ mol −1 for the inaja seed, respectively. The values of the high heating value ( HHV ) of buriti and inaja seeds were similar to lignocellulosic biomasses and are estimated at 21.3 and 18.0 MJ kg −1 , respectively. The thermodynamic parameters (Δ G , Δ H , and Δ S ) and the reaction mechanism using the master plot method were determined. Furthermore, the evolution of the gas during pyrolysis was performed by thermogravimetry coupled with mass spectrometry (TG/MS). The main gaseous products evolved during active pyrolysis were H 2 O, CO 2 , CO, aldehydes, esters, carboxylic acids, and saturated and unsaturated hydrocarbons, which can be converted into energy and valuable chemicals. This dataset contributes to investigating these biomasses as candidates for applications in the pyrolysis process.