Density, Shatter index, and Combustion properties of briquettes produced from groundnut shells, rice husks and saw dust of <i>Daniellia oliveri</i>

Abstract

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/cm 3 . 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/cm 3 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.

Densification of coal fines and mildly torrefied biomass into composite fuel using different organic binders

“…(4).IRI=100×Averagenumberofdropsbadbreak/2mAveragenoofpieces Water resistance : A simple immersion-in-water test on a single briquette was adopted for resistance against absorption of water and disintegration (water resistance index-WRI) in accordance with modified Richard's method [18]. Briquette of a known weight (W1)was immersed in a cylindrical glass containing 220 ml distilled water at 30 ± 2°C for 30 minutes after which it was removed and cleaned to remove water on its surface and reweighed (W2).…”

Bio-Oil and Biochar Derived from the Pyrolysis of Palm Kernel Shell for Briquette

“…This procedure was adopted with modification from Tembe and Ekhuemelo (2014). The contents of cellulose, hemicelluloses and lignin for the shell are shown in Table 1 along with other literature results.…”

Bio-Char and Bio-Oil Mixture Derived From the Pyrolysis of Mesocarp Fibre for Briquettes Production

“…The hardness of the briquettes was found in agreement with the Shattered index (Tembe et al, 2014). The weights of the briquettes were weighed before and after the shatter index test.…”

“…The weights of briquettes were measured using a digital weighing balance, and to calculate the volume of briquettes the average diameters and heights of the briquettes were taken at three positions with Vanier caliper. This procedure was adopted with modification from Tembe et al (2014). The density was then calculated (Equation 4).…”