ABSTRACT The Niger Delta coastal line is one of Nigeria’s richest and largest navigation corridors, characterized by very windy and temperature conditions, such that with possibility of any oil spill incident, catastrophic environmental degradation will occur. Available mathematical models for predicting crude oil spills spread rate will not provide accurate prediction of spread rate under ambient temperature changes and wind effects. This work is concerned with deve...
ABSTRACT Transient compressible natural gas flow through a pipeline was studied by the use of a finite volume method in 2D axisymmetric cylindrical coordinates. To account for turbulence within the pipeline system, the standard turbulence model was simulated together with the Navier Stokes System of equations via the Reynolds-Averaged method. The equation of state employed was the SoaveRedlich-Kwong equation. Implicit discretization was used for the temporal terms, wherea...
The effects of temperature, dielectric constant and catalysis in the kinetics of the oxidation –reduction reactions (involving electron transfer) of N-(2-hydroxy-ethyl) ethylenediammine- N’,N’,N’-Triacetatocobalt (II) by Cu2+ cation were determined. The dielectric constant was decreased from 63.05 to 43.18 and it was found that the rates of the reaction did not show any appreciable change. This seems to mean that the change in the dielectric constant of the medium had no effect on ...
This work investigated the anaerobic digestion of cow-dung and cassava peels, the effect of co digestion in biogas production and purification process for biogas upgrade. The biogas experiments were carried out in five different anaerobic digesters which contained cow-dung and cassava peels slurry in the (wt-wt%) ratios of (100:0), (75:25), (50:50), (25:75), (0:100) and were incubated for a 30-day period at ambient temperature. Combined absorption and adsorption process was used to purif...
The project research entailed the production of high quality sealant incorporating a local raw material for sealing holes and gaps in various materials like metal and plastic. Two samples of acrylic sealants were produced, the first samples which is the standard formulations involved the use of silica gel as a major adhesion promoter and the second samples which is the research formulations involved the use of sand (sharp colourless sand with 59% silica/silicondioxide composition)) as a...
ABSTRACT Parasitic infections such as malaria in host organisms often lead to oxidative stress condition resulting in the constant generation of free radicals and other reactive species in vivo that lead to extensive oxidative damage in bio-molecules such as DNA and proteins. Susceptibility of Plasmodium parasite to oxidative stress is a wellestablished feature and advantage has been taken of this property to design some prooxidant anti-malarial drugs. This study was carried out with the aim ...
ABSTRACT Background: Malaria is a common and life-threatening disease in Ghana. Malaria infection has been implicated in lipid and glucocorticoid imbalances among children. Cortisol-induced stresses and parasitaemia may affect brain development and risk of cardiovascular disorders among children. Aim: To investigate the impact malaria has on lipids and glucocorticoids in children. . Method: A comparative cross-sectional study using random sampling method was used in this study conducted betwe...
Abstract: The purpose of this study is the preparation of activated carbon using a suitable industrial sludge. The characterization of two types of industrial sludges showed that paper sludge was a better option over rice husk. The activated carbon produced from pyrolysis of paper mill sludge was chemically activated with various activating agents like zinc chloride, potassium hydroxide and potassium chloride. A systematic investigation of the effect of impregnation ratio, activation temp...
Abstract Cowpeas were prepared into flour by wet dehulling, wet milling into paste and drying; wet dehulling, drying and milling; and wet dehulling, wet milling and foam mat drying. Proximate chemical composition and functional properties (water and fat absorption capacities, foaming capacity, foam stability, bulk density, gelation capacity and emulsification capacity) of flours and of paste prepared by wet dehulling, wet milling and no drying, were determined. Akara from fresh paste and pas...
Abstract Humans have been harnessing solar energy for thousands of years—to grow crops, stay warm, and dry foods. According to the National Renewable Energy Laboratory, “more energy from the sun falls on the earth in one hour than is used by everyone in the world in one year.” Today, we use the sun’s rays in many ways—to heat homes and businesses, to warm water, or power devices. Solar, or photovoltaic (PV), cells are made from silicon or other materials that transform sunlight dir...
ABSTRACT Horizontal well application has sometimes been employed as a way of minimizing excessive water production arising from coning commonly encountered during oil production in vertical wells. Lots of efforts on water coning in vertical wells have been published. Available predictive models in horizontal wells vary from rather simplistic to complex models. This study investigated the development of practical models that combine ease of use with accuracy. Conformal mapping was used to comb...
ABSTRACT This project is on the enhancement of the performance of an Ubakala clay sample for use as drilling mud. A sample of Nigerian clay (Ubakala clay) was used for the project. The clay sample was collected in a raw state, processed and experiments conducted on viscosity which is a very important property of drilling mud. Various concentrations of sodium carbonate were mixed with the clay sample and experiments were conducted to determine the viscosities of the control and the cla...
ABSTRACT Liquid-Liquid Equilibrium (LLE) data of Butyric acid-Water-Toluene ternary system were determined experimentally at a temperature of 30oC and 1 atmosphere. The complete phase diagram was obtained by determining the solubility curve and the tie-lines. The reliability of the experimental tie-line data was ascertained by using the Othmer and Tobias plot. Also, the UNIFAC model equations were used to estimate the activity coefficients of the system using the interaction parameters fo...
ABSTRACT This research presents a flexible design model and robust algorithm for simulation of a crude oil plant which consists of a main column with several side strippers and pumparounds. The model is developed in commercial software HYSYS, Pro/II and Aspen Plus, in order to evaluate the performance of the simulation of these models on personal computers. The development of the mathematical model of the equipments of the unit is based on the relations that are presented in the equilibri...
ABSTRACT The Multicomponent adsorption models and kinetics of deodorization of commercial kerosene (DPK) using conventional and non-conventional adsorbents have been investigated. The adsorbents used were bone char, limestone, silica gel and clay. The influence of contact time, adsorbent mass, pH, temperature, and adsorbent particle size on the rate percent aromatic and sulphur removal was evaluated. The experimental results were fitted to the Langmuir, Freundlich, Redlich-Peterson, Radke...