Continuous rotary kiln pyrolysis of cassava plant shoot system and wide speciation of oxygenated and nitrogen-containing compounds in bio-oil by HESI and APPI-Orbitrap MS.

Autor: Silva WR; Petroleum and Energy from Biomass Research Group (PEB), Department of Chemistry, Federal University of Sergipe, São Cristóvão SE, 49107-230, Brazil., Santos RM; Center of Multi-User Chemistry Laboratories, Federal University of Sergipe, São Cristóvão SE, 49107-230, Brazil., Wisniewski A Jr; Petroleum and Energy from Biomass Research Group (PEB), Department of Chemistry, Federal University of Sergipe, São Cristóvão SE, 49107-230, Brazil. Electronic address: albertowj@academico.ufs.br.
Jazyk: angličtina
Zdroj: Bioresource technology [Bioresour Technol] 2024 Jul; Vol. 404, pp. 130915. Date of Electronic Publication: 2024 May 31.
DOI: 10.1016/j.biortech.2024.130915
Abstrakt: This work proposes the pyrolysis of the cassava plant shoot system biomass and a comprehensive chemical characterization of the resulting bio-oil. The highest yields of liquid products were obtained at 600 °C, with 12.6 % bio-oil (organic fraction), which presented the lowest total acid number of 65.7 mg KOH g -1 . The bio-oil produced at 500 °C exhibited the highest total phenolic content of approximately 41 % GAE, confirmed by GC/MS analysis (33.8 % of the total area). FT-Orbitrap MS analysis found hundreds of oxygenated constituents in the bio-oils, belonging to the O 2-7 classes, as well as nitrogen compounds from the N y and O x N y classes. Higher pyrolysis temperatures resulted in more oxygenated phenolics (O 4-7 ) undergoing secondary degradation and deoxygenation reactions, generating O 2-3 compounds. Additional classes affected were O 3-5 N 2-3 , while O 1-2 N 1 presented more stable compounds. These findings show that cassava bio-oils are promising sources of renewable chemicals.
Competing Interests: Declaration of competing interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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