Drying and pyrolysis of lulo peel: non-isothermal analysis of physicochemical, kinetics, and master plots

This research paper is about the kinetics of drying and pyrolysis processes of lulo (Solanum quitoense Lam.) peel powder, which was studied using thermogravimetric analysis (TG), differential scanning calorimetry (DSC), and mass spectrometry (MS). TG data was fitted using theoretical approximation according to the Newton model to obtain the kinetic parameters of drying, and the isoconversional methodology using Friedman’s method for the pyrolysis process. The results of each thermogram showed a relation between each other. In all of them, three characteristic stages were identified related to drying, pyrolysis, and carbonaceous matter. At the same time, there was a decomposition of the lignocellulosic biomass and light volatiles in the pyrolysis process. In the thermograms, three characteristic stages were identified: the first stage is the dehydration which ended at 120 °C, the second is the pyrolysis which is between 120 and 450 °C, and from this temperature, the third stage, carbonization, begins. In the pyrolysis stage, five peaks corresponding to independent reactions were identified; activation energy (Ea) and the reaction mechanism (f(α)) of each peak were calculated by means of master curves. After comparing the theoretical and experimental master plots, it was observed that the reaction mechanism corresponds to the Avrami-Erofeev model. Thermal analyses indicate that lulo peel is a potential waste for the production of coal for power purposes. It could be contributing to improve the management of waste and at the same time it could be used as a power supply or for water treatments such as activated carbon

• Autores: Caicedo Chacon, Wilson Daniel; Ayala Valencia, Germán; Agudelo Henao, Ana Cecilia; Aparicio Rojas, Gladis Miriam
• Tipo de recurso: Article of journal
• Fecha de publicación: 2020
• Institución: Universidad Autónoma de Occidente
• Repositorio: RED: Repositorio Educativo Digital UAO
• Idioma: eng
• OAI Identifier: oai:red.uao.edu.co:10614/13386
• Acceso en línea: https://hdl.handle.net/10614/13386
• Palabra clave: Biomasa; Biomass; Differential scanning calorimetry; Thermogravimetric analysis; Pyrolysis; Lignocellulosic biomass
• Rights: openAccess
• License: Derechos reservados - Springer, 2020