Thermochemical conversion of coconut waste: material characterization and identification of pyrolysis products

• Published in: Journal of thermal analysis and calorimetry Vol. 143; no. 1; pp. 637 - 646
• Main Authors: Borel, Lidja Dahiane Menezes Santos, de Lira, Taísa Shimosakai, Ataíde, Carlos Henrique, de Souza Barrozo, Marcos Antonio
• Format: Journal Article
• Language: English
• Published: Cham Springer International Publishing 2021; Springer; Springer Nature B.V
• Subjects: Acetic acid; Acetone; Activation energy; Aldehydes; Analytical Chemistry; Biofuels; Biomass energy; Cellulose; Chemical composition; Chemistry; Chemistry and Materials Science; Decomposition reactions; Furfural; Inorganic Chemistry; Ketones; Lignin; Measurement Science and Instrumentation; Physical Chemistry; Polymer Sciences; Pyrolysis; Thermal degradation; Analytical pyrolysis; Coconut waste; Thermogravimetric analysis; Kinetics parameters
• ISSN: 1388-6150; 1588-2926
• DOI: 10.1007/s10973-020-09281-y

In this work, coconut waste was evaluated for its potential for biofuel production via pyrolysis by considering physicochemical properties, kinetics of thermal degradation, and chemical composition of products generated. The kinetic of pyrolysis was investigated based on data obtained in a thermogravimetric analyzer at various heating rates. The independent parallel reactions model was used to describe the decomposition process. The activation energy ( E a ) values estimated for extractives, hemicellulose, cellulose, and lignin were 194.7–197.7, 122.8–128.6, 244.1–250.5, and 53.0–64.0 kJ mol −1 , respectively. The composition of the pyrolytic vapors was investigated via Py-GC/MS at different temperatures in an inert helium atmosphere. The results show that products of pyrolysis of the coconut waste can be a source of valuable chemicals, such as phenol, 1-hydroxy-2-propanone, furfural, and acetic acid. The increase of the reaction temperature resulted in the formation of hydrocarbons and in an increase in the number of aldehydes and ketones.