Jamiu Odusote

• PhD
• Professor at University of Ilorin

Biomass torrefaction into fuel pellets is deemed a sustainable energy solution, which could mitigate over-dependency on fossil fuels. This study examined the effects of pelletization and torrefaction on selected physical and thermal properties of corncob waste (CW). Corncob samples were collected, sorted and pulverized, before torrefaction pre-trea...

Corrosion is a common and inevitable process in engineering materials, particularly metals. This study investigated the effectiveness of gold nanoparticles (AuNp) as a corrosion inhibitor for mild steel in a 2 M HNO₃ environment. Mixtures of AuNp with gloss paint were prepared at concentrations of 0, 5, 10, 15, and 20 µg/ml to coat the surface of m...

THE TWO HUNDRED AND FORTY-SIXTH (246TH) INAUGURAL LECTURE TITLED "ENGINEERING MATERIALS DEVELOPMENT AS CATALYST FOR INNOVATION" BY PROFESSOR JAMIU KOLAWOLE ODUSOTE, B.Sc. (OAU-Ife); M.Sc. (Ibadan); PGDE (Ijagun); Ph.D. (Wits); R. Engr. (COREN); MNSE; MNMS; FNIMMME DEPARTMENT OF MATERIALS AND METALLURGICAL ENGINEERING, FACULTY OF ENGINEERING AND TEC...

Management of waste materials is a serious concern to researchers and scientists. Waste materials cause health and environmental hazards. Hence, they should be properly managed. The aim of this study is to develop a grinding disc using agricultural wastes (palm kernel shell and snail shell), granite, aluminium oxide, and polyester resin. The partic...

Despite the widespread use of mercerization in treating cellulosic materials, there is a lack of understanding about the effects of different alkaline sources and concentrations. This study investigated the structural, compositional, and morphological changes induced by mercerization on coconut coir samples using FTIR and SEM analyses. FTIR analysi...

Slider-crank mechanism (SCM) was developed with digital read-outs in this study to make the reading of experimental results more accurate. They are connected by joints and force elements for the conversion of reciprocating motion into rotary motion or vice-versa. A digital protractor (accuracy = ± .) and a digital vernier caliper (accuracy = +0.02...

This research looks into designing and developing a wireless eight-legged walking robot that can traverse all terrain using the Klann mechanism. The Klann mechanism is beneficial for advanced walking vehicles. It can travel in areas that are currently not accessible with wheels. The most crucial benefit of this mechanism is that it does not require...

The use of natural particles as reinforcement in polymers has become a subject of research in recent years due to their eco-friendly nature. This study aims to explore the use of cassava back peel, as a reinforcement material in epoxy resin-based composite. Composite plates were prepared for the casting of the epoxy resin reinforced with carbonized...

The overwhelming cost of conventional lubricants has instigated the need for alternatives in the engineering industry. This study identified the physicochemical properties of Shea butter made from the shea nut and their application as a bio-grease in the food processing and industrial sectors. Some preliminary tests were conducted to ascertain the...

Hydroxyapatite (HAp) production from eggshells for dental implant purposes involved a novel approach utilizing a wet chemical precipitation technique. The eggshells, finely ground to a size below 250 µm, underwent calcination at a high temperature of 900°C for 2 hours. This thermal treatment facilitated the conversion of calcium carbonate into calc...

The need for food size reduction before consumption has led to the use of motorized grinding machine which operates on energized rubbing of two grooved cast-iron discs, and this unintentionally results in tribological degradation and corrosion of grinding discs into the ground food. The objective of this study was to carry out an assessment of corr...

This study investigates the corrosion behaviour of silver-gold nanoparticles as an inhibitor on the degradation of mild steel in 3.5% NaCl (saline environment) using gravimetric analysis and potentiodynamic measurement. The inhibitor Ag-AuNPs was synthesized from Kola nut pod. Five different concentrations of the Ag-AuNPs solution (0, 5, 10, and 20...

In Africa and Asia, methods for processing grains and vegetables to powder and paste is still dominated by motorized grinding machine, which operates on energized rubbing of two grooved cast-iron discs. This method inadvertently results in tribological degradation of discs into ground foods. And implicitly, metal particles are consumed in ground fo...

Purpose: The use of inhibitors, especially in aqueous environments is one method of controlling corrosion. This study used gravimetric, gasometric, and potentiodynamic techniques to examine the corrosion inhibition potential of silver-gold nanoparticles (Ag-AuNPs) in a 1.0 M HCl solution. Methods: The Ag-AuNPs were chemically synthesized from Kola...

Mechanical, physical, and corrosion properties of pure aluminum cannot meet the requirements of the modern industries. This has led to increase in demand for aluminum alloys and aluminum matrix composites with enhanced properties. These properties make them suitable for most applications. This article analyzes the physicomechanical and microstructu...

Owing to the adverse effects of corrosion, scientist have devised several means of its control. Amongst these means is the use of inhibitors which could be synthetic or from natural sources. Synthetic inhibitors are often toxic and expensive, hence inhibitors from natural source are preferred. Action of Moringa oleifera and Jatropha curcas leaves e...

There is a continuous effort across the nation on production of bio-oil and biochar from biomass and plastics. However, there are no locally deigned and fabricated pyrolyser for this purpose. A mini ablative pyrolyzer was fabricated successfully. The maximum operating temperature is 600℃. The pyrolyser chamber was designed to produce bio-oil and bi...

The need for sustainable and renewable printing ink while reducing importation necessitate this research work. Printing ink suitable for an ink jet printer was synthesized using locally sources pigments (such as carbonized sawdust, pulverized charcoal, and lampblack) and organic vanish at different ratios. The renewable pigments were mechanically m...

Composite are multi-phase materials made up of matrix and reinforcement. These materials are innovated to meet the growing needs of modern industries. This paper assesses the tribological property of Al6063 alloy (AMCs) reinforced with Okaba coal ash (OCA) using the stir casting method. By using a constant speed of 1000 rpm and two different loads...

The densification parameters for sub-bituminous coal briquette were optimized in this study to obtain 12 maximum drop to fracture (DF), water resistance index (WRI), and cold crushing strength (CCS). Full 13 factorial experimental design was used to optimize the compaction pressure (14 and 56 MPa), particle 14 size (0.5-1 mm), and external moisture...

The use of inorganic binder for briquetting of subbituminous coal and torrefed biomass for energy generation is scarce. The present study focuses on the physicomechanical durability and energy content of briquettes produced from subbituminous coal (SubC) and torrefed biomass (TM) using bentonite as binder. Briquettes were produced using 95% SubC...

The use of inorganic binder for briquetting of subbituminous coal and torrefied biomass for energy generation is scarce. The present study focuses on the physicomechanical durability and energy content of briquettes produced from subbituminous coal (SubC) and torrefied biomass (TM) using bentonite as binder. Briquettes were produced using 95% SubC...

The evaluation of thermal decomposition characteristics and kinetic parameters of melina wood were investigated. Proximate, ultimate and calorific value analyses of the melina wood were carried out based on standards. Melina wood was subjected to multiple heating rates (5–15 °C/min) in thermogravimetric experiment. Two prominent isoconversional met...

Corrosion control of metals in aggressive environments has attracted a lot of attention due to its associated economic losses. However, most corrosion control techniques have not satisfactorily minimized these losses. This study examined the inhibition effects of silver nanoparticles (AgNPs) incorporated in gloss paint on corrosion of carbon steel...

Teak wood is one of the prominently used raw material in the construction industry, thus contributing extremely to the biomass waste available in Nigeria. These wastes are usually used for energy generation that requires upgrade into better fuel before application. Hence, the present study evaluates the non-isothermal kinetic parameters for pyrolys...

Non-isothermal kinetic parameters of the pyrolysis process of Tectona grandis were evaluated with different model-fitting methods. The thermal degradation of the Tectona grandis was examined using a ther-mogravimetric analyser. Pulverized Tectona grandis (6.5 mg) was heated from 30 to 800°C at varying heating rates (5, 10 and 15°C=min) in an inert...

Melina wood torrefied at 260°C for 60 min was agglomerated with lean grade coal fines into composite briquettes using pitch as binder. Torrefied biomass (3%-20%) and coal fines (80%-97%) were blended together to produce the composite briquettes under a hydraulic press (28 MPa). The briquettes were cured at 300°C. Density, water resistance, drop to...

The microstructure and mechanical properties of Al-Zn-Cu alloy with magnesium inclusion varying between 0.5 and 1.5 wt% were explored in this investigation. Al-Zn-Cu-Mg alloy was prepared by sand casting. Heat-treatment was done on the cast alloy samples at 460 C for 2 h, which was then waterquenched. The samples at 160 C were age-hardened for 5 h....

This paper presents an assessment of the tumbling strength and reactivity behaviour of hybrid fuel briquette (HFB) produced from coal and torrefied woody biomass wastes. Briquettes were produced using 97% coal and 3% torrefied biomass with the blend of pitch and molasses in different ratios as a binder. The briquettes were treated in an inert envir...

In this study, the influence of gold nanoparticles (AuNPs) on corrosion behavior of mild steel, aluminium and stainless steel in 1.0 M HCl was investigated. The nanoparticles were previously characterized using FTIR, UV-Vis and TEM. Five concentrations of AuNPs solution (0 mg/ml, 5 mg/ml, 10 mg/ml, 15 mg/ml, 20 mg/ml) were added to 1M HCl. The corr...

Non-isothermal kinetic parameters of the pyrolysis process of Tectona grandis were evaluated with different model-fitting methods. The thermal degradation of the Tectona grandis was examined using a thermogravimetric analyser. Pulverized Tectona grandis (6.5 mg) was heated from 30 to 800 °C at varying heating rates (5, 10 and 15 °C) in an inert env...

The behaviour of ash of fuel affects its thermal efficiency when in use. The ash analyses of bio-coal briquettes developed from lean grade coal and torrefied woody biomass have received limited intensive study. Therefore, the present study aims at analysing the ashes of briquette made from lean grade coal and torrefied woody biomass using blended c...

Plukenetia conophora (Nigerian Walnut) leaf extract was studied as a corrosion inhibitor on Al-Zn-Cu alloy in acidic (HCl and H2SO4) media using gravimetric, gasometric and electropotential techniques. The study showed that the inhibition efficiency (IE) increased as the concentration of the leaf extract increased and reached the peak (94.8%) at 0....

Heat treatment industries require various quenching media to improve the properties of the materials to be quenched. Petroleum based mineral (PBM) oil, a non-biodegradable oil, is popular amongst other quenchants in heat treatment processes. Recently, biodegradable oils mostly in their raw, unblended and unbleached forms have been employed for que...

Addition of copper and use of solution heat treatment solution with bio-degradable vegetable oils as quenchants has great potential to improve the mechanical properties of aluminum and its alloys. In this study, copper was added to as-received Al- Si-Mg alloy to produce Al-Si-Cu-Mg alloy. The specimens were quenched with blended bleached bio-quenc...

Torrefaction and densification are crucial steps in upgrading biomass as feed- stock for energy generation and metallurgical applications. This paper attempts to discuss essential basics on biomass torrefaction and densification, which can propel developing nation to take full advantage of them. The most promising clean energy sources that have fou...

The biodegradable vegetable oil based quenchants can serve as cooling media alternative to that of the toxic non-biodegradable petroleum based mineral oil in a heat treatment of aluminium and its alloy. 70 vol. % of edible vegetable oil are blended with 30 vol. % of Jatropha oil to form bio-quenchant oils for Aluminium (Al)-alloy probe treated at 5...

Research work on corrosion behaviour of metals and their alloys continues to attract considerable attention because of the huge cost required to prevent corrosion and replace failed or contaminated components due to corrosion reactions. Different inhibitors have been used to minimize corrosion rate, but addition of nanoparticles has been reported t...

The impact of torrefaction temperature on the ignitability, fuel ratio and ash fusion temperatures of two tropical deciduous woods (Teak and Melina) were investigated in a setup of tubular furnace. The properties considered are calorific value, fuel ratio, ignitability index, ash compositions and ash fusion temperatures of the biomass. Six differen...

The study focused on using image analysis to explain the effects of several cycles of rapid heat treatment on the microstructure of 0. 213 wt. % carbon steel. The samples to be examined were first subjected to diffusional heat treatment followed by several cycles of rapid heat treatment. The process of diffusional heat treatment involved heating th...

The study is focused on using an image analysis to explain the effects of several cycles of rapid heat treatment on the microstructure of 0.213 wt. % carbon steel. The samples examined are subjected to a diffusional heat treatment followed by several cycles of a rapid heat treatment. The process of the diffusional heat treatment involves heating th...

Densification of agricultural residues such as husks, shells and cobs into fuel briquettes is an alternative renewable feedstock for producing solid fuels because it improves their physico-mechanical, storage and combustion properties. This paper presents the physico-mechanical characterisation of fuel briquettes made from blends of corncob and ric...

Al-Zn-Cu alloys are widely used in various manufacturing industries. However, the need to improve the mechanical strength of the alloy while the overall weight is reduced has continued to be a major concern. Therefore, the present study investigates the influence of magnesium addition on mechanical properties and microstructure of Al-Zn-Cu alloy. A...

This research was aimed at using image analysis to describe the effects of rapid cyclic heating on mild steel. AISI 1021 steel sample used in this study was subjected to quenching heat treatment followed by 1, 2, 3, and 4-cycles of rapid heat treatment. The as-treated steel samples were characterized by Brinell hardness tests, Charpy V-notch impact...

A torrefaction parametric study was conducted on Tectona grandis at varying torrefaction temperatures (240–300 °C), residence times (30–60 min), and particle sizes (2–6 mm) using a full factorial design (FFD). Optimum parameters were obtained through numerical optimization using the response optimizer in Minitab 17. These parameters were used to pr...

Steel bars are important engineering materials for structural application. In Nigeria, due to incessant building collapse occurrences, it is important to further investigate some of the mechanical and chemical properties of reinforcing steel bars produced from scrap metals in order to ascertain their compliance with the required standard. Three dia...

Iron ore is one of the major raw materials required to produce iron and steel products. However, there is a need to characterise the iron ore to determine their grade based on the iron and other mineral contents before usage. In this study, iron ores from Jaruwa and Agbaja deposits were characterised using X-ray diffractometer, X-ray florescence sp...

Densification of agricultural residues into briquettes as the alternative renewable feedstock can improve their physico-mechanical and storage properties as solid fuels. This paper presents the physico-mechanical properties of the composite briquettes made from corncob and rice husk. Raw samples of corncob and rice husk were collected, sorted and p...

This study was carried out to characterise metallic contaminants extracted from millet ground in different conditions namely: wet, paste, and dry forms using domestic grinding machine with cast grinding disc. The extracted metallic contaminants from the ground millet were examined with PAN analytical XPERT-PROMPD X-ray diffractrometer and ASPEX 302...

Coal processing industries generate millions of tons of fines (<3 mm) during mining operation and are often considered as wastes. These wastes have enormous potential in serving as energy and metallurgical operation feedstock. One avenue for its use is densification into briquettes or pelletizes. Various briquetting techniques have been adopted in...

Cartons and chicken feathers are common wastes which we need to dispose in one way or another. Disposal problems associated with these wastes can be solved by processing them into useful products such as insulation and ceiling boards. In this study, chicken feather reinforced ceiling board was developed from waste carton and Portland cement. The qu...

This paper presents a study on the synthesis and characterization of hydroxyapatite that can be used to produce dental implants or serves as a replacement for other body hard tissues. The bioceramic material (hydroxyapatite) was derived from bovine bone samples after they were de-fatted and processed to produce particles measuring less than 250 μm....

Torrefaction process is a thermal treatment that can improve quality of lignocellulosic biomass into a carbon-rich and hydrophobic feedstock which is applicable as fuel and metallurgical reductant. Biomass (Melina and Teak wood) of Nigerian origin was subjected to mild (240) and severe (300) torrefaction treatment at different residence times (30 a...

One of the most promising routes to produce solid biofuel from biomass is mild pyrolytic treatment (torrefaction). In the present study, mild pyrolytic treatment of Gmelina arborea was carried out to obtain optimum energetic yields (mass yield, higher heating value and energy yield). The biomass of 0.5–6 mm particle sizes were torrefied at two diff...

This is a novel work of converting million tons of lean grade coal fines and woody biomass wastes to a useful hybrid fuel briquette using organic binders (pitch, molasses and starch). Torrefaction technology was used to upgrade the woody biomass into a carbon-rich, energy-densed and hydrophobic materials that was then aggregated with lean grade coa...

The quality of steel rods used in structural applications has been subjected to continuous scrutiny by researchers in Nigeria. In this article, the experimental data on the chemical and mechanical properties of steel rods from collapsed building sites and local steel plants have been reported. The chemical composition consisting of carbon, manganes...

In the present study, an attempt has been made for an effective utilisation of lean grade non coking coal slacks through briquetting process. Organic binders along with biomass were used as a binder during the briquetting of coal slacks. Briquettes were made by mechanical pressing of homogeneous mixture of coal slacks, biomass, organic binder and m...

In this study, the quantity of metallic contaminants extracted from grinded millet was evaluated. The millet was grinded in three different forms; wet, paste, and dry forms for up to 3 minutes using locally fabricated grinding machine with cast grinding discs. Separate grinding discs were used for different millet forms, while the same quantity of...

Palm Kernel Shell (PKS) and Mesocarp Fiber (MF) are residues from oil palm which are treated as waste in most oil palm production mills. PKS was pulverized and sieved into different grain particle sizes of 350 µm, 250 µm and 150 µm. The pulverized PKS were then mixed with MF in the ratios 90:10, 80:20 and 70:30, respectively, with cassava back peel...

Coke is one of the important raw materials being fed into blast furnace for production of quality iron and steel. Coal processing industry generates large amount of coal slacks, which are often considered as wastes and thus are generally discarded. However, coal slacks can be treated and used for generation of energy or as a raw material for produc...

In this work, we investigated the effects of heat treatment on the microstructure, hydrogen storage characteristics and corrosion rate of a Ti34V40Cr24Fe2 alloy. The arc melted alloy was divided into three samples, two of which were separately quartz-sealed under vacuum and heated to 1000 °C for 1 h; one of these samples was quenched and the other...

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...

In this work, we investigated the effects of heat treatment on the microstructure, hydrogen storage characteristics and corrosion rate of a Ti34V40Cr24Fe2 alloy. The arc melted alloy was divided into three samples, two of which were separately quartz-sealed under vacuum and heated to 1000 °C for 1 h; one of these samples was quenched and the other...

The inhibiting effect of Plukenetia conophora leaf extract on the corrosion of galvanized sheet in 1.0M H2SO4 and HCl solutions at ambient temperature was investigated in this study using gravimetric and gasometric methods. The corrosion rates of the galvanized sheets decreased with increased concentration of the inhibitors and exposure time. The s...

Coconut fibre and wood dust are currently discarded as waste materials but can be used as natural reinforcement in polyester matrices to replace synthetic reinforcement materials which are expensive and non-renewable. This study investigated the effect of coconut fibre and mahogany wood dust filler as reinforcement in polyester matrix on the tensil...

The mechanical properties of selected reinforcing steel bars produced from two rolling mills in Osun State, Nigeria were studied. An optical emission spectrometer was used for chemical composition analysis while the tensile test was carried out using a Universal Testing Machine. Izod v-notched was used for impact test, while the hardness values wer...

Using natural plant fibres as reinforcement in polymers has earned relevance in recent years due to their eco-friendly nature. Thus, an investigation was undertaken on banana pseudo stem, a natural fibre abundantly available in Nigeria. Banana pseudo stem fibres are not only strong and lightweight, but also relatively inexpensive for they are often...

Jatropha curcas leaves extract was tested as a green corrosion inhibitor for mild steel in aqueous hydrochloric acid solution using gravimetric and thermometric techniques. The results reveal that the inhibition efficiency vary with concentration of the leaf extract and the time of immersion. Maximum inhibition efficiency was found to be 95.92% in...

Cassava peel is a substantial by-product of cassava processing and it constitutes about 13% of the crop. Cassava peel is still currently considered a waste often discarded into the environment indiscriminately, and therefore economically underutilized. In the present work, silica was synthesized from cassava periderm via sol gel route. Cassava peri...

Biodegradable fibres derived from natural plants are abundantly available and are currently considered as waste. This study aims at investigating the mechanical properties of pineapple leaf fibre reinforced thermoset composites as possible alternatives to the above knee glass fibre reinforced prosthetic socket. This study was carried out according...

Biodegradable fibers derived from natural plants are abundantly available and are currently considered as waste. This study aims at investigating the mechanical properties of pineapple leaf fiber reinforced thermoset composites as possible alternatives to the above-knee glass fiber reinforced prosthetic socket. This study was carried out according...

This paper examines the effect of zinc and copper additions on the mechanical properties of recycled sand cast Al–Cu–Zn alloys. Chemical composition analyses of the samples showed that the actual composition of the base metal, Al, and the alloying elements, Cu and Zn, varied from the targeted composition. The tensile test results revealed that Cu a...

Nigeria has abundant supplies of biomass resources and agro-forestry residues (waste), including sawdust, whose potentials are yet to be fully utilized for economic advantage. This study was undertaken to investigate the properties of paperboard briquettes produced from a mixture of shredded waste paper (pulp) and sawdust using starch as binder. Th...

Many automobile components are made from aluminium and its alloys because of their suitable properties. Metals and their alloys are usually subjected to heat treatment in order to improve their properties. Thus, the effect of precipitation hardening on the mechanical properties and microstructure of sand cast aluminum alloys was investigated. The c...

The inhibiting effect of Moringa Oleifera leaf extract on the corrosion of a reinforced steel bar in 2M solution of hydrogen chloride (HCl) was studied using gravimetric, gasometric and potentiodynamic polarization techniques. The study revealed that as the concentration of the extract increases, the inhibition efficiency increases in all three inv...

This work compares the performance of palm and shea butter oils based cutting fluids, mineral oil and dry machining during turning operation of AISI 1033 steel. The results revealed that the interface temperature increases with increased cutting speed during the turning operations. Thicker and more continuous chips were formed when cutting fluids w...