Alteration of physico-chemical characteristics of coconut endocarp — Acrocomia aculeata — by isothermal pyrolysis in the range 250–550 °C

dc.contributorUniversidad Nacional de Asunción - Facultad de Ciencias Químicas
dc.contributorUniversidad Nacional de Asunción - Facultad de Ingeniería
dc.creatorDuarte Chávez, Shirley Johanna Magalí
dc.creatorAlmeida, Giana
dc.creatorRolon, Juan Carlos
dc.date2022-04-25T12:46:59Z
dc.date2022-04-25T12:46:59Z
dc.date2017
dc.date.accessioned2023-09-25T13:32:07Z
dc.date.available2023-09-25T13:32:07Z
dc.identifierhttp://hdl.handle.net/20.500.14066/3570
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8807845
dc.descriptionCharacteristics of the endocarp of Acrocomia aculeata fruit samples were evaluated before and after 2 h of iso thermal pyrolysis in the range 250–550 °C. Differential thermogravimetric (DTG) curves from the char, obtained at 300 °C, confirm that degradation of hemicellulose and cellulose was complete and resulted in approximately 42.5% oxygen loss. The micrographs obtained from scanning electron microscopy with a field emission gun (SEM/FEG) confirmed a softened phase from the chars treated at 250 °C. The van Krevelen analysis shows that energy intensification of the sample transferred from peat to charcoal as the treatment intensity increased; this resulted in a 71% mass loss at 550 °C. The surface area of the treated sample increased exponentially with a factor of 1.2 per percentage of mass loss, from 450 °C and reached 216 m2 /g at 550 °C as a consequence of the development of microporous structures. The water-vapor-sorption properties were strongly affected by the treatment, with a pronounced type V isotherm curve for the char at 550 °C. These results show the evolution in chemical and structural properties of coconut endocarp during its isothermal pyrolysis. In particular, the im proved char properties indicate that this material may be used as solid fuel or as raw material for the gasification process.
dc.descriptionCONACYT - Consejo Nacional de Ciencia y Tecnología
dc.descriptionPROCIENCIA
dc.languageeng
dc.relation14-INV-087
dc.rightsopen access
dc.subject6 Producción y tecnología industrial
dc.subjectSURFACE AREA
dc.subjectELEMENTAL ANALYSIS
dc.subjectDYNAMIC VAPOR SORPTION
dc.subjectCOCONUT ENDOCARP
dc.subjectPYROLYSIS MECHANISM
dc.titleAlteration of physico-chemical characteristics of coconut endocarp — Acrocomia aculeata — by isothermal pyrolysis in the range 250–550 °C
dc.typeresearch article


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