Department of Mechanical Engineering

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    Physical Properties of Biomass Fuel Briquette from Oil Palm Residues
    (JASEM, 2017-06-18) H.O. Muraina; Jamiu Kolawole Odusote; Adekunle Akanni Adeleke
    Palm Kernel Shell (PKS) and Mesocarp Fibre (MF) were used for the production of fuel briquettes in this study in order to supplement the energy mix of the nation. PKS was pulverized and then sieved into different grain particles of 350 μm, 250 μm and 150 μm, before mixing with MF in the ratios: 90:10, 80:20 and 70:30 (PKS: MF respectively). Cassava Peel (CP) was used as binder for the briquettes. A 200 kN force was exerted during densification while the waiting time for the briquettes to properly form was 120 seconds. Proximate/physical analysis was carried out and the results showed that briquette series of 150 μm (80:20) has the minimum moisture content of 6.00 % while series 350 μm (90:10) recorded the lowest ash content of 1.50 %. Volatile matter of 72.80 % was recorded from series 150 μm (70:30) as the highest of all the series produced. Briquette series of 350 μm (70:30) have the highest fixed carbon and calorific value of 19.90 % and 18.1063 kJ/g, respectively. The results showed that the fuel briquettes from PKS and MF (especially 350 μm series) could serve as alternative source of energy for domestic and industrial applications. Keywords: Palm kernel shell; Mesocarp fibre; Briquette; Biomass solid fuel; proximate analysis.
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    Combustion characteristics of fuel briquettes made from charcoal particles and sawdust agglomerates
    (Elsevier, 2019-10-14) H. A. Ajimotokan; A.O. Ehindero; Kabiru Sulaiman AJAO; Adekunle Akanni Adeleke; Peter Pelumi Ikubanni; Y. L. Shuaib-Babata
    The combustion characteristics of fuel briquettes made from Idigbo (Terminalia ivorensis) charcoal particles, pinewood (Pinus caribaea) sawdust and their agglomerates using gelatinized cassava peels were investigated. The charcoal particles and pine sawdust were blended in the mixing ratios of 90:10, 80:20, 70:30, 60:40, and 50:50, respectively and vice-versa. More so, briquettes were produced from pure charcoal particles and pine sawdust separately for the purpose of comparison with the blended briquettes. The gelatinized binder was 5% of the total briquettes weight. The briquettes were produced using a pressure of 5 MPa with a dwelling time of 5 min in a hydraulic briquetting machine. Proximate, elemental compositions and heating value analyses were carried out on the raw charcoal, sawdust, cassava peel, and their briquettes. The results showed that variations in the mixing ratios of the bio-residues had significant effects on all the properties investigated. An increase in the charcoal particles led to an increase in the fixed carbon content and heating value of the briquettes. Conversely, higher pine sawdust content in the briquette resulted in higher volatile matter content and lower heating value. The briquette made from pure charcoal particles had the highest heating value (24.9 MJ/kg) and ash content (6.0%). Its carbon, hydrogen, and oxygen contents were in the range of 44.6–50.1%, 5.1–5.6% and 34.4–41.5%, respectively. The proximate analysis, elemental composition analysis, and heating values of the produced fuel briquettes depicted that they have better combustion properties when compared to the raw charcoal, pine dust, and cassava peel. Thus, the produced briquettes would serve as good fuel for domestic and industrial applications.