Browsing by Author "Popoola, O. T."
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Item Densification of tropical wood residues for the development of solid fuels(Proceedins of International Conference on Sustainability, Energy & Environment-Hawaii 2019, 2019) Rabiu, A. B.; Lasode, O. A.; Popoola, O. T.; Babatunde, O. P.; Ajimotokan, H. A.Densification of materials through pelletisation, briquetting and cubing to form strong and durable bonding products with greater structural homogeneity, better handling and durability properties has attracted the attention of researchers in recent past. The present work focused on conversion of residues of some tropical wood species to energy fuel through pelletisation. The woody-biomass species studied were Apa (Afzelia Africana, AA), Iya (Daniella oliveri, DO) and Arira (Detarium microcarpum, DM) which were sourced in Nigeria. The samples were prepared in different sizes of less than 0.50 mm, 0.50 - 1.00 mm and 1.00 - 1.70 mm after drying in a laboratory environment. The different particle sizes were forced into a prepared die using gelatinised starch as binder. Higher heating value (HHV), impact resistance index (IRI) and water resistance test were obtained for all samples with and without binder. The average HHV of pellets produced from DM was found to be 26.53 MJ/kg without binder, which is the highest among the three samples, showing that DM may have higher lignin content. However, pellet samples AA produced with binder has average HHV of 25.41 MJ/kg which is highest among the three samples. Result showed that IRI increases as particle size decreases for pellets produced without binder, while for pellet with binder, IRI increases as the particle size increases. Result of water resistance test showed that the disintegration time increases as particle size decreases. The basic physical properties that enhance handling and transportation operations of wood pellets have been achieved when compared with standard.Item Development of Abrasive Sandpaper Grains from Agro-Waste Material for Polishing of Wood Surface(Faculty of Engineering and Technology, Adeleke University, Ede, Nigeria, 2019-01) Ibrahim, H. K.; Abdulhamid, A. S.; Abdulkareem, S.; Shuaib-Babata, Y. L.; Popoola, O. T.; Kareem, A. G.; Adeyi, A. M.; Busari, O. Y.; Ambali, I. O.In Nigeria, natural and some synthetisynthetic abrasive grains used in manufacturing of sandpaper such as silicon carbide, aluminum oxide and aluminum silicate mineral are scarce and expensive. The aim of this paper focused on development of sandpaper grains from agricultural waste material (Coconut shell) and resin (binder) for smoothening of wood surface. Sieving analysis was conducted in particle sizes of P40 (420 μm) and P60 (250 μm) sandpaper grit size (according to Federation of European Producers of Abrasive standard). The Physical and Mechanical properties were determined and compared with properties of conventional products (P60 and P40 Garnet Paper). Surface finish assessments were carried out with visual inspection on selected wood. The result from elemental composition analysis showed that the produced sample grains contain some hard ceramic materials needed for effective polishing or surface finishing. The physical and mechanical properties of the grains samples were found to have close properties with the standard conventional sand paper. Hardness and compressive strength of Coconut shell (CNS) grains/resin composites samples increased with increase in polyester resin concentration. Samples made from 250 μm sieve size showed better mechanical properties than the corresponding samples from 420 μm sieve size. The wear rate of CNS/resin composites was also found to increase with increase in load (40, 60, 80, 100 and 120 g) and temperature (50 and 150 oC. Also, result from visual examination shows that the CNS specimens contribute to high material removal but not smoother due to grain sizes considered for this study