Utilização de resíduos de coco seco carbonizados para a produção de briquetes

Abstract

The main objective of this work is to use dried coconut waste carbonized for the production of briquettes. Dry coconut waste was collected near the Malanga market. For the production of briquettes, it was necessary the carbonization process of the samples, which occurred at 400°C, followed by the energetic densification at a constant pressure of 10 Mpa, for a mass of 60 g of sample. Cashew nut skins and waste from cashew processing were used. cotton as binders. The physicochemical and thermal analyzes of biomass and briquettes showed that the endocarp presented better properties compared to the mesocarp. Two types of binders were used: cashew nut film and cotton processing residues. Cashew nut skin was considered the best binder in relation to cotton processing waste. The power higher calorific value of endocarp (23.71 MJ/kg) and mesocarp (22.19 MJ/kg) briquettes is close to that of charcoal (26.73 MJ/kg). The endocarp briquettes presented higher energy density (23.44 GJ/m3 ) in relation to mesocarp briquettes (18.20 GJ/m3 ). Both types of briquettes proved to be somewhat friable, with an index of combustion of 0.66 for the endocarp and 0.61 for the mesocarp. In the water boiling test, there was a yield of 23.63% for endocarp briquettes and 23.34% for mesocarp, values ​​very close to those of charcoal (24.13%), which indicates that the residues selected in this study are ideal for the production of briquettes with high content energy. The CO and fine particle emissions test showed values ​​above the levels recommended, suggesting the need to optimize the combustion process (TRADUÇÃO NOSSA).