Solid fuel characterization of torrefied coconut shells in an oxidative environment

Author(s):Jes Tanchuling, Rizalinda De Leon
University of the Philippines Diliman, Quezon City, 1101, Philippines
International Journal of Smart Grid and Clean Energy, vol. 7, no. 2, April 2018: pp. 145-151
ISSN: 2315-4462 (Print)
ISSN: 2373-3594 (Online)
Digital Object Identifier: 10.12720/sgce.7.2.145-151

Abstract: Torrefaction is a thermo-chemical treatment to address problems in use of biomass as a fuel especially for combustion; it is usually done between 200-300 ºC in an inert or low oxygen environment. This study investigated the properties of local Coconut Shell chips that were torrefied using a batch reactor in an oxidative environment at torrefaction temperatures of 250ºC and 300ºC, and torrefaction time of 30 minutes and 60 minutes. Analysis of solid products included Thermogravimetric Analysis (TGA), Fourier Transform Infrared Spectroscopy (FTIR), Proximate Analysis, Higher Heating Value (HHV) determination, and Equilibrium Moisture Content (EMC). Overall, the results in the solid product showed changes in composition and on the thermal degradation curve; also improvement of fuel properties in terms of HHV, Fixed Carbon Content, and EMC. Among the settings, the 300 ºC and 30 minutes setting is recommended with significant improvement of the solid fuel.

Keywords: Biomass, coconut shell, oxidative torrefaction, solid fuel
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