Conversion of Edamame Pods (Glycine max) and Cassava Peel into Biobriquettes Using a Mixture Fly Ash and Bottom Ash: Thermal Characteristics and Optimization

Abstract

The increase in population has led to a rise in energy demand, resulting in the depletion of energy reserves, particularly non-renewable sources. One solution to this issue is the development of alternative energy sources, such as biomass-derived biobriquettes. This study investigates the impact of material composition and mesh size on the thermal characteristics of biobriquettes. The raw materials used include edamame pods, bottom ash, and cassava peel as an adhesive. The pyrolysis of edamame pods was conducted at 250 °C for 30 min. An experimental method was employed to test the thermal characteristics, including calorific value, moisture content, ash content, volatile matter content, and combustion rate. The results of the biobriquette test were compared to the standards set by SNI 01-6235-2000, which pertains to wood charcoal briquettes. The test results indicate that the optimal briquettes consist of 90% edamame pods charcoal and 10% bottom ash, with a mesh size of 40. These briquettes exhibit a calorific value of 20,717.1 J/g, a moisture content of 2.72%, an ash content of 18.67%, a volatile matter of 61.49%, and a burning rate of 0.146 g/min.