Produção e caracterização dos briquetes de biomassa florestal: serradura de umbila, chanfuta e pinho

Abstract

The use of residual woody biomass, specifically wood sawdust, Wood, for the production of briquettes, is a good way to use it. AND For better use of briquettes, it is necessary to know their characteristics. In this sense, the main objective of this work was to produce and evaluate the characteristics of Afzelia sawdust briquettes quanzensis (chanfuta), Ptercarpus angolensis (umbila) and Pinus (pine), collected in a sawmill located in the neighborhood of Chamanculo, City of Maputo. The briquettes were produced manually using a press hydraulics. The briquetting process was carried out at a temperature of 150, pressure of 10 MPa, without the use of binder and using 60 g of biomass for each briquette. Chanfuta, umbila and pine sawdust were evaluated in relation to bulk density (514.88; 318.18 and 139.96 kg/m3 ); content of humidity (13.37, 13.07 and 11.63%); volatile content (72.69, 75.80 and 84.35%); content of ash (4.03, 4.45 and 0.65%); fixed carbon content (23.28, 19.74 and 15.00%) and higher calorific value (19.53, 18.76 and 18.45 MJ/kg). The briquettes proved to be very little friable and with good dimensional stability. Presented apparent density in the range of 1016.46 to 1043.73 kg/m3 ; density energy in the range of 13.58.10 3 at 14,70,103 MJ/m3 ; maximum voltage in the range from 2.40 to 2.93 MPa; maximum force ranged from 5676.4 to 7304.7 N; indices of combustion (ICOM) ranging from 0.4439 to 0.5594; power in range from 3.50 to 3.67 kW and specific consumption in the range from 1.99 to 2.53 kg/kg. These results indicate that the briquettes combine the characteristics & thermal behavior necessary to be used as fuels. Taking into account all these parameters, it is observed that the best biofuels, of those that were studied, were briquettes produced from chanfuta sawdust (TRADUÇÃO NOSSA).