Density, Shatter index, and Combustion properties of briquettes produced from groundnut shells, rice husks and saw dust of Daniellia oliveri
Objective: This study investigated the potential use of sawdust of Daniellia oliveri (African Copaiba Balsam Tree), Rice husk and Groundnut shells to make briquettes for energy generation.
Methodology and Result: Doughnut shaped briquettes were produced from three biomass materials at 15%, 25%, and 35% level of starch binder in binary and tertiary combinations. Density, Shatter index and Combustion properties of the briquettes were investigated. The compressed density of Daniellia oliveri + Groundnut briquettes was highly significant (P<0.01) at 2.32g/cm3. The relaxed density was highly significant (P<0.01) among the biomass materials and binder levels. Daniellia + Groundnut briquettes recorded the highest relaxed density of 2.46g/cm3 at 25% starch binder. Daniellia + Groundnut briquettes recorded the highest shatter resistance of 90.4. The specific heat of combustion of briquettes ranged from 4455.0Kcal/kg to 4734.0Kcal/kg.
Conclusion and Application of Results: The relative high heating values of the briquettes biomass materials indicate that they can be a very good alternative source of energy for domestic cooking. It is therefore recommended that sawdust of Daniellia oliveri, Rice husk and Groundnut shells that are usually discarded as waste in Nigeria could be converted to briquettes, which will serve as alternative source of energy for domestic cooking.
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