Production and characterization of the solid product of coconut pyrolysis

• Published in: Biomass conversion and biorefinery 2023-05, Vol.13 (7), p.6317-6329
• Main Authors: Paz, E. C. S., Paschoalato, C. F., Arruda, M. G., Silva, G. G., Santos, M. L. G., Pedroza, M. M., Oliveira, L. R. A.
• Format: Article
• Language: English
• Subjects: Adsorptivity; Biomass; Biotechnology; Calorific value; Charcoal; Correlation coefficients; Energy; Gas flow; Heating rate; Lignocellulose; Methylene blue; Original Article; Pyrolysis; Renewable and Green Energy; Thermal analysis; Thermal decomposition
• ISSN: 2190-6815; 2190-6823
• DOI: 10.1007/s13399-021-01561-3

In this present study, it aimed to characterize biomass and obtain charcoal by means of pyrolysis of Cocos nucifera L. from a fractional planning 2 4-1 to be used in the removal of methylene blue. The investigated effects were temperature of 500 and 550 °C, heating rate 10 and 20 °C/ min, gas flow 1 and 4 mL/ min, and time of 30 and 60 min. The biomass composition showed values ​​for cellulose 36%, hemicellosis 11.2%, lignin 32.1%, calorific value of 17.5 MJKg -1 , density 0.158 g / mL, carbon 45.1%, hydrogen 6.8%, oxygen 0.4%, and nitrogen 47.7%. The results indicate that among the investigated effects, only the temperature influenced the charcoal yield. The best yield was at 500 °C with a specific surface area of ​​30.3801m 2 / g, a maximum methylene blue adsorption capacity of 67.7%, and better fit to the Langmuir isotherm model with a correlation coefficient R 2 = 0.9804. Regarding thermal analysis, it was observed that above 250 °C lignocellulosic thermal decomposition begins. The charcoal presented uniform size and pores, which influenced the adsorptive process of removing methylene blue.