Emmanuel Osoka

Federal University of Technology Owerri | FUTO · Department of Chemical Engineering

Several studies has reported the use of neural networks in the dynamic modelling and simulation of heavy duty turbines. However; focus on exhaust gas temperature a key indicator of turbine thermal health is yet to be made. In this paper the modelling of exhaust gas temperature using the non-linear autoregressive network and subsequent multi step pr...

The ability of Mangifera indica seed extract to inhibit the corrosion of tin metal immersed in 0.5M HCl acid using the gravimetric method, in the form of a prolonged test and a rapid test at room temperature was studied. The prolonged test was carried out over a period of 21 days at two (2) days intervals, while the rapid test was performed for 5ho...

Oxalic acid was extracted from sawdust and mangrove bark. Mangrove bark was dried and crushed into different sizes. It was also determined by soaking in ethanol solution for 48 hours. The tannin-free-bark obtained was soaked in a dilute sulphuric acid solution for 24 hours to precipitate calcium sulphate with the release or formation of oxalic acid...

This work studies the kinetics of bioremediation of Crude Oil contaminated soil using banana stalk ash as a bio-stimulant, by studying the kinetics of biomass growth and nature of yield. Twelve samples of soil contaminated with 20g to 60g of Crude oil and with 0g to 60g of banana stalk ash added as bio-stimulant were studied based on the total petr...

The need for a clean and cheap source of energy is ever increasing in our world today. Biodiesel has become a topic of interest for some time and researches are still ongoing on how to obtain cheaper feedstock for biodiesel production. Moreover, there is need to improve the oxidative stability of biodiesel which is a measure of its shelf life, seei...

This work studied the performance enhancement of Ubakala clay for use as drilling mud. A clay sample was collected from Ubakala in Abia State of Nigeria, processed and beneficiated with varying concentrations of soda ash (0-6wt %). Experiments were conducted to determine the viscosities of the control and clay-soda ash mixture at different curing t...

This work studied the performance enhancement of Ubakala clay for use as drilling mud. A sample of Ubakala clay was used for this research. The clay sample was collected, processed and beneficiated with varying concentrations of soda ash (0-6wt %). Experiments were conducted to determine the viscosities of the control and clay-soda ash mixture at d...

Corrosion inhibition of mild steel and copper using Azadirachta indica (neem) seed extract in 0.5M, 1.0M and 1.5M H2SO4 was investigated using the gasometric method. The data obtained were fit to Zero order, half order and first order models based on volume of hydrogen evolved. These results show that the kinetics of corrosion of mild steel and cop...

The fiber loading capacity and poor adhesion between fibers and matrix remains an area of concern in fiber polymer composites. The fiber loading capacity and aspect ratio of mercerized milletia sp fiber on mechanical properties (tensile strength, tensile modulus, tensile toughness, elongation, flexural and impact strength) of Milletia sp fiber epox...

Brief Introduction to MATLAB (Definition of Terms)

A theoretical approach for estimation of Poisson ratio of cylindrical or square cross-sectional samples has been proposed. The test material was assumed to be elastic or plastic in behavior, but does not undergo any change in state or significant change in volume during the testing process and the cross-sectional area of the test material is approx...

A new approach in the analysis of stress-strain data, for determination of the mechanical properties of materials is presented. The new approach uses a linear-quadratic rational model fit to the stress-strain curve to reduce the effects of random errors, like deflection of the test machine, on the calculated values of mechanical properties. The slo...

The modulus of composites formed from three selected natural fiber sources (Empty Plantain Bunch Fiber, Empty Palm Bunch Fiber and Rattan Palm Fiber)-mercerized at optimum conditions-with two selected thermosetting resins (Polyester and Epoxy resins) has been studied. The modulus was obtained as the slope of the linear part of the stress-strain cur...

The roles of Student Industrial Work experience scheme in adding the training component to education and completing the learning experience by bridging the gap between the class room and the industry was discussed.

The degradation kinetics of vitamin C in three fruits namely; orange, banana and apple under different market storage conditions prevalent in Nigeria were investigated. Orange and banana samples were stored in sacks and open air at ambient conditions, while open air and refrigerator were used for apple samples. Storage was for 6 days duration. .Iod...

The mechanical properties of Composites formed from three selected natural fiber sources (Empty Plantain Bunch Fiber, Empty Palm Bunch Fiber and Rattan Palm Fiber), mercerized at optimum conditions, with two selected thermosetting resins (Polyester and Epoxy resins) have been studied for automobile application. Optimum conditions for mercerization...

Modeling a bioremediation process of a petroleum contaminated soil enhanced with NPK Fertilizer and animal/plant derived organic manure,‖ Abstract-In this study, the potential effects of animal derived organic manure (cow dung, poultry droppings), saw dust and NPK fertilizer on the bioremediation of petroleum hydrocarbon contaminated soil was inves...

Modeling a bioremediation process of a petroleum contaminated soil enhanced with NPK Fertilizer and animal/plant derived organic manure,‖ Abstract-In this study, the potential effects of animal derived organic manure (cow dung, poultry droppings), saw dust and NPK fertilizer on the bioremediation of petroleum hydrocarbon contaminated soil was inves...

Two major techniques; water retting and dew retting, were used to extract natural fiber from empty plantain fruit bunch. Four different size categories each comprising of a group of six (6) bunches were used for the water retting experiments and two size categories each of six (6) bunch samples were used for the dew retting experiments. Results for...

Empty Plantain Bunch Fiber was treated with a solution of 2wt% - 10wt% NaOH for 30mins - 150mins and the Tensile Strength, Toughness, Modulus of Elasticity, Yield Strength and Ductility were studied using response surface methodology. The results reveal that mercerization of empty plantain bunch fiber increases the Modulus of Elasticity up to fifty...

A mathematical model that can successfully predict the rate of spread of oil spill in coastal waters within a few hours of spill using an analytical method based on mass and momentum conservation equations, is presented in this work. The model considers the spreading when the inertial and viscous forces counter balance gravity. The effect of wave-i...

A model for prediction of crude oil blend property was chosen for development of a linear programming problem, which was solved to obtain optimum composition of three crude blends (Shell's UQCC, Chevron's ESCRAVOS and Arab light crude) that minimizes cost and meets quality standards required for lubricant production. Results show that the optimum b...

The optimum parameters (temperature, contact time and adsorbent-to-crude PKO ratio) were determined for the bleaching of PKO using activated snail shell. A D-optimal design for twelve experimental runs at three levels, for temperature, contact time and different amounts (masses) of activated pulverized snail shell (adsorbent-to-crude PKO ratio) was...

An algorithm-based on smoker's analytical equation-suitable for the development of computer programs, for the determination of some design parameters of a binary distillation column was presented. A sample problem was modified, with respect to constant relative volatility, and solved using the algorithm. We compared the solution obtained using the...

A clay-catalysed esterification reaction between ethanol and acetic acid was modeled using 23 factorial design of experiment. The variables investigated were catalyst weight, reactants mole ratio and reaction time. The clay, a kaolonite type obtained from Ukpor stream in Anambra state of Nigeria was activated with dilute sulphuric acid and dried in...

The crude oil weathering process of Bonny Light Crude oil was simulated experimentally with a view to obtaining am empirical model equation that will relate the degree of weathering to the amount of specific biomarker compounds, in this case the Pristane/Phytane ratio.

This work presents a simple non-linear mathematical model for petroleum resource depletion for Nigeria. A simple mathematical model was developed and fit to cumulative petroleum production data collected from Department of Petroleum Resources (DPR). Ministry of Petroleum Resources, using curve-fitting toolbox of MATLAB 7.0, and the fit results comp...

The flexural strength-the resistance to fracture-of raffia palm fiber-cement composites for low cost roofing tiles was investigated. The composites were prepared at varying sand-to-cement ratios (1-5), water-to-cement ratios (0.4-0.8) and fiber volume fraction (0-4%). The flexural strength of the samples was determined and a statistical model based...

The liquid-phase esterification of acetic acid with ethanol catalysed by acid-activated montmorillonite clay from Udi in igeria was studied using four experimental plans with varying temperature, catalyst weight and reactant mole ratio. The reaction was run for six hours and the reaction rates obtained by differential method of analysis. Mechanisti...

The rate of starch gelatinisation under strong alkali conditions was modeled at low conversion (x < 0.4), with the degree of gelatinisation (conversion) defined in terms of sample viscosity. Experimental data at low conversion were fit to eleven rate models based on the mechanism of the unreacted-core model and the rate controlling steps determined...

The rate of starch gelatinisation under strong alkali conditions was modeled at low conversion (x < 0.4), with the degree of gelatinisation (conversion) defined in terms of sample viscosity. Experimental data at low conversion were fit to eleven rate models based on the mechanism of the unreacted-core model and the rate controlling steps determined...

Bioremediation of ex-situ crude oil contaminated soil to which Palm Bunch Ash was added has been studied in this work based on Total Petroleum Hydrocarbon Content. Four samples each were contaminated with 100g, 200g and 300g respectively of crude oil and 0g, 100g, 200g and 500g of Palm Bunch Ash were added respectively to the four samples to produc...

The rate of Bioremediation of crude oil contaminated soil ex-situ to which Palm Bunch Ash (PBA) was added has been studied in this work, based on Total Petroleum Hydrocarbon content. Four samples each were contaminated with 100 g, 200 g and 300 g respectively of crude oil and 0 g, 100 g, 200 g and 500 g of Palm Bunch Ash were added respectively to...

The rheological properties of a starch solution with a water-starch ratio of 2.0w/w were studied during gelatinisation under strong alkali conditions, in a co-axial cylinder viscometer for 17g/dm3 - 23g/dm3 concentrations of NaOH solution. The viscosities and fluidities of the sample were measured at intervals of ten seconds and plotted. Equilibriu...

Cassava particulate from the cultivars CAS001, CAS002 and CAS003 were subjected to thin layer drying at 100OC (in an oven dryer) after being fermented for 48 hours. The experimental data obtained from the drying was fit to ten selected non-linear thin layer drying models using MATLAB curve-fitting toolbox. Three of these models which coincidentally...

The rheological properties of a starch solution with a water-starch ratio of 2.0w/w were studied during gelatinisation under strong alkali conditions, in a co-axial cylinder viscometer for 17g/dm 3-23g/dm 3 concentrations of NaOH solution. The viscosities and fluidities of the sample were measured at intervals of ten seconds and plotted. Equilibriu...

The tensile and impact properties of talc-filled low density polyethylene (LDPE) were investigated using 0.40wt% filler content. From the results, the addition of 10% talc showed a decrease in tensile strength from 365.8MPa to 274.9MPa. Subsequent addition of talc showed progressive increase in the tensile strength, On the other hand % elongation a...

The coagulation performance of periwinkle shell coagulant (PSC) using coal washery effluent has been investigated at room temperature using various dosages of blended and unblended PSC. In addition, the coagulation reaction rate constant K, the order of reaction, , the collision efficiency p and the particle distribution were also determined. Tur...

Three bioremediation options, including a control, were studied based on reduction in Total Hydrocarbon Content, and hydrocarbon utilizing bacteria (HUB) count, among other factors, for eight weeks, with measurements taken at two-week intervals, using Rumuekpe community of Rivers State Nigeria as a case study. Models were developed for the microbia...

Drying kinetics of fermented cassava mash (gari) during the falling rate period, was studied in three dimensions.

This work briefly introduces Support Vector Machines as a modeling technique using the X-OR problem, with two target values. The technique was then extended to dependent variables with four target values by a modification of the decision function. Finally, this modified decision function was used to model data adopted from a two-level factorial exp...

Power and heat transfer correlations and results were obtained for the scale-up of a grease pilot plant. The pilot plant was designed to produce 0.25m3/batch of soap base grease. The results showed that while other variables increased in certain proportions with the scaling up, the heat transfer coefficient decreased with scaling up. This trend kep...

This paper presents issues on waste disposal crises and remediation in petroleum industry through the application of thermal incinerator with special emphasis on gaseous wastes. The remediation approaches include the application of bioremediation, dispersion by chemical reaction, (DCR) technology, gas stacks, landfills, gar-re-injection, thermal in...

Polishes are mostly pastes of waxes, solvent and dyes. In this work trial formulations for black leather polish using castor wax-from hydrogenated castor oil-and carbon black (dye) with benzene or ethanol as solvent were obtained and analyzed. The castor oil was hydrogenated to form castor wax which was added piecemeal into a dispersion of carbon b...