Investigation of briquette derived from Pterocarpus indicus leaves and rejected pineapples as inedible sources of renewable energy

GOTAMA, GABRIEL JEREMY and Willyanto, and Sutrisno, and Suprianto, Fandi Dwiputra and Jonoadji, Ninuk and ARIFIN, FRANSISKUS XAVERIUS YULIO (2020) Investigation of briquette derived from Pterocarpus indicus leaves and rejected pineapples as inedible sources of renewable energy. In: International Conference on Mechanical Engineering Research and Application (iCOMERA), 08-10-2020 - 08-10-2020, Malang - Indonesia.

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Abstract

Previous study has shown the potential of using Pterocarpus indicus leaves, which are considered wastes, as biomass material for briquette production. However, the use of tapioca as binder may negatively affect the availability of food resources. An alternative to tapioca was proposed in this study by substituting it with rejected pineapples which are considered as wastes. Series of investigations were conducted to understand the potential of briquette made of Pterocarpus indicus leaves with rejected pineapple as binder. The investigations included bomb calorimeter test to determine the proportion of biomass to binder that generate the highest calorific value, the proximate and ultimate analyses, and the investigation of optimum particle size of biomass and condensing pressure related to the briquette�s combustion characteristics. The results showed that 95% biomass and 5% binder to have the largest calorific value of 4169.76 kcal kg-1. Results from both proximate and ultimate analyses endorsed the use of rejected pineapple as substitute for tapioca binder. Briquette with the optimal combustion characteristics was obtained with condensing pressure of 2 MPa and biomass size of 60 mesh (250 μm).

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