Pyrolysis of Coconut Inflorescence Wastes: Production, Effects of Parameters, Characterization and Optimization of Phenolic-Rich Bio-Oil

Pyrolysis of Coconut Inflorescence Wastes: Production, Effects of Parameters, Characterization and Optimization of Phenolic-Rich Bio-Oil

The coconut industry has great economic importance for the Asia–Pacific region and Brazil. For this reason, researchers have given special attention to coconut shells and fibers as fuel sources. However, other residues as coconut inflorescence wastes (CIW) have been neglected. In this work, CIW were...

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Bibliographic Details
Published in:International Journal of Environmental Research Vol. 16; no. 2
Main Authors: Farias, Rodrigo Oliveira, Lins, Pollyanna Vanessa Santos, Gabriel, Rafaela, Silva, Alson David Rodrigues, Carvalho, Lívia Luísa Melo, Meili, Lucas, Albuquerque, Allan Almeida, Carvalho, Sandra Helena Vieira, Soletti, João Inácio, Bispo, Mozart Daltro
Format: Journal Article
Language:English
Published: Cham Springer International Publishing 01-04-2022
Springer Nature B.V
Subjects:
Biomass
Charcoal
Earth and Environmental Science
Economic importance
Environment
Environmental Engineering/Biotechnology
Environmental Management
Factorial design
Geoecology/Natural Processes
Heating rate
Industrial applications
Landscape/Regional and Urban Planning
Natural Hazards
Oil
Oil wastes
Optimization
Phenolic compounds
Phenols
Pyrolysis
Research Paper
Response surface methodology
Tradeoffs
Wastes
Yield
Coconut inflorescence wastes (CIW)
Pyrolysis
Phenol
Biomass
Bio-oil
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Summary:The coconut industry has great economic importance for the Asia–Pacific region and Brazil. For this reason, researchers have given special attention to coconut shells and fibers as fuel sources. However, other residues as coconut inflorescence wastes (CIW) have been neglected. In this work, CIW were pyrolyzed. Effects of pyrolysis temperature (290–710 °C) and heating rate (2–58 °C∙min −1 ) were evaluated. A full factorial design (FFD) was developed to identify interaction effects. Product (biochar, gas and bio-oil) yield and phenol concentration in the bio-oil ( C Phenol ) were the responses investigated. Response surface methodology and central composite design (CCD) were used to obtain optimum conditions. Biomass and bio-oil were further characterized by thermogravimetric (TG) and GC–MS analyses. TG results indicated the FFD levels. Temperature and heating rate showed significant effects on the responses. A linear model was suitable for gas yield, while quadratic models were fitted to other responses. A trade-off analysis between bio-oil yield and C Phenol detected optimum values of 42.9% and 47.1 mg g −1 at 530 ºC and 4.0 ºC min −1 . Finally, phenolic compounds accounted for 77.8% of total peak area of the bio-oil based on GC–MS results. Therefore, bio-oil produced by pyrolysis of CIW showed to be a promising source of phenols for industrial use. Graphical abstract Article Highlights Pyrolysis of coconut inflorescence wastes (CIW) was investigated. Effects of pyrolysis temperature and heating rate were evaluated on the responses. RSM and CCD were used to obtain maximum product yield and phenol concentration. A trade-off analysis based on the desirability function suggested optimum values. Coconut inflorescence biomass and bio-oil were characterized by TD/DTG and GC-MS.
ISSN:1735-6865
2008-2304
DOI:10.1007/s41742-022-00393-x