Produção e caracterização de briquetes provenientes de serradura de tronco de coqueiro e resíduos de mandioca - casca de mandioca

Abstract

The present work entitled Production and Characterization of Briquettes from Coconut Tree Trunk Sawdust and Cassava Residues (Cassava Peel) was carried out with the objective of producing briquettes from coconut tree sawdust and cassava residues (cassava peel) and analyze your quality parameters. The briquettes were produced without adding binders, at a pressure of 10MPa with temperature variation (100oC and 150oC). Samples of sawdust from coconut tree trunks and cassava bark were characterized from the point of view of immediate analysis, namely moisture content, chemical properties (ash, volatiles, fixed carbon), from which the higher calorific value, lower calorific value and useful calorific value. Quality parameters of the produced briquettes were also evaluated, namely mechanical properties (apparent density, bulk density, expansion test, traction by diametral compression) and thermal properties (boiling test and combustion index). The results of the characterization of the biomasses under analysis show that for both residues studied they presented energetic properties superior to 2746.73Kcal/Kg compatible with the traditional solid biofuel (charcoal) and that the compaction is an alternative potential to valorize biomasses that do not compact naturally. Briquettes based on coconut tree sawdust were produced with an average humidity of 10.66% and briquettes based on cassava bark with a humidity of 11.68%, both with granulometry below 0.450mm. Coconut tree sawdust biomass had lower ash content compared to cassava bark biomass, and higher volatile content, fixed carbon content and calorific value compared to cassava bark biomass. The briquettes from coconut sawdust produced at a temperature of 150°C and pressure of 10MPa showed better mechanical strength (0.7MPa) compared to the briquettes from cassava bark (0.41MPa) under the same conditions. And cassava bark-based briquettes at 100°C and 10MPa showed good mechanical strength (0.20MPa) in relation to coconut tree sawdust briquettes (0.15MPa) produced under the same temperature and pressure conditions. With regard to thermal efficiency, the briquettes based on coconut tree sawdust at 150°C and 10MPa showed a higher energy potential