Effect of densification variables on water resistance of corn cob briquettes
¹University of Lagos, Faculty of Engineering, Department of Mechanical Engineering, PMB 56, Akoka, Nigeria
²Ladoke Akintola University of Technology, Faculty of Engineering and Technology, Department of Agricultural Engineering, PMB 4000, Ogbomoso, Nigeria
³Leibniz Institute for Agricultural Engineering and Bioeconomy, ATB, Department of Post-Harvest Technology, Max-Eyth-Allee 100, DE14469 Potsdam, Germany
Solid biofuels can be used in heat and power generation applications. The utilization of agricultural residues for this purpose would be of immense benefit to rural communities of developing countries where the resource is being produced. Water resistance is a crucial property for transport and storage of biomass briquettes under moist climate conditions. In this study, the effect of process and material variables on the water resistance property of corn cob briquettes was investigated. The water resistance of briquettes produced ranged between 32.6 and 94.8% for die temperature between 90 °C and 120 °C, hold time from 7.5 to 15 minutes and die pressures between 9 and 15 MPa. A higher die temperature resulted in an increase in the water resistance of the biomass briquettes. Also, increasing the hold time improved the water resistance of the briquettes. Using a particle size less than 2.5 mm resulted in higher briquette water resistance property compared to briquettes produced from particle sizes greater than 2.5 mm. It was also shown that the effect of the interaction of the temperature with particle size on the water resistance of corn cob briquettes was statistically significant (p < 0.05).