Experimental Study on the Mechanical Properties of Biomass Briquettes from Different Agricultural Residues Combination

Abstract

Biomass has received tremendous attention as it is one of the best alternatives to replace the use of fossil fuels for energy generation. However, there are problems associated with the utilization of raw biomass which could be resolved through densification process. Besides, mixing between residues could produce a quality briquette, at the same time making good use on the biomass residues. Rice husk, sugarcane bagasse and spent coffee ground were selected as the biomass feedstocks for briquettes formation. The mixing ratios of 100:0, 80:20, 60:40, 20:80, 40:60 and 0:100 were used for three different combinations. The briquettes were then compacted at 300 bars and 150°C for 30 s. The mechanical properties of the briquettes were measured with respects to their shatter resistance, abrasive resistance as well as water resistance. The mechanical properties of the briquettes could be effectively improved by mixing between the residues as compared to the pure materials. The result showed that briquettes formed with 40: 60 of RH to SB; 20: 80 of RH to SCG and 20: 80 of SB to SCG were among the optimum mixing ratio for the respective combination fulfilling the specifications of the mechanical strength and durability.