ABSTRACT Environmental pollution by non-biodegradable plastics, gradual reduction and increase in cost of petroleum products used have affected lives over the years. With people using different kinds of packaging, it has a part of human daily living. Therefore, it is very important to find lasting and sustainable ways of producing and managing the wastes generated by these plastics. In this work, starch based biocomposites are fabricated and characterised to access its opportunities to repla...
ABSTRACT Oil spills have been a major source of concern due its harmful effect on the environment. To reduce the effect of oil spills, new remediation strategies need to be developed whiles enhancing the efficiency of existing remediation ones. In this study, the potential of TiO2 and its modified form (Fe-TiO2) as a stand-alone or as an add-on remediation strategy was explored. This was carried out by accessing the how TiO2 and Fe-TiO2 photodegrades crude oil fractions (aromatics, paraffins,...
ABSTRACT: The present study assessed water quality parameters and attempts to compare four different Water Quality Indexes (WQIs) for consistency, similarity and reliability in assessing the water quality of river Benue -an inland river- under wet and dry seasons. The results demonstrate that River Benue is continually being polluted in both dry and wet seasons by different sources, particularly domestic sewage and storm runoffs from farmlands. The quality of the water generally excee...
One of the fundamental factors that determine the success or failure of a behavioural change campaign is the nature of communication strategies adopted by the change agent. Nigeria has been declared a polio free nation, but scholarly attention has not been given to the role played by communication strategies in the success of polio immunisation and eradication projects in Northern Nigeria. This study, therefore, investigated the communication strategies used in polio immunisation campaig...
ABSTRACT Sugarcane as an agricultural product is a readily available source of food for its sugar content. However, Sugarcane Bagasse Ash (SCBA) is the bi- product formed at sugar industries from the burning of sugarcane after the sugar content has been extracted. Sugarcane Bagasse Ash (SCBA) is a fibrous waste product containing mainly aluminum and silica, calcium ions to produce calcium aluminate hydrate (CAH) and calcium silicate hydrate (CSH) shown in the pozzolanic reaction below. Ca2+ +...
ABSTRACT This project involves the design and implementation of an intelligent obstacle-avoiding robot car. The objective of this project is to implement a robot car, which while moving should have the ability to detect obstacles in its path and change direction where obstacles are present without any form of external influence. The new direction to be taken to avoid collision is the direction that has the most distance between the obstacle and the sensor and this is determined by the robot b...
ABSTRACT Computer software is used extensively to increase productivity and reduce man‟s hours of labour. This work presents the development of a solids control software (SOLCON) which is designed for real time mud system management and quick performance of routine rig computations: determination of total solids and low gravity solids content; mud property and density control requiring optimal ejection rate into the mixing pit; volume of mud and amount of barite, bentonite and additives to...
ABSTRACT This novel work is based on the study of Vongvuthipornchai and Raghavan, 1987. In this work a new 3-Dimensional non-linear partial differential equation describing the transient flow of nonNewtonian fluid in porous media is developed for a hypothetical no-flow boundary cuboid reservoir. The basic assumptions in the mathematical modeling of the differential equations are; permeability anisotropy with directional permeabilities ݇௫, ݇௬ ܽ݊݀ ݇௭ , an isothermal, single phase, s...
ABSTRACT Analytical and finite element models were used to simulate additive cold welding patterning processes. The effects of adhesion, pressure, thin film (layer) thickness and dust particle modulus (between the contacting surfaces) are examined. A simple model is developed and used to determine the contact profiles around impurities between cold-welded thin films. These are computed as a function of adhesion, particle modulus, and layer thickness. The models are shown to provide new insig...
Crude oil is seldom produced alone from reservoirs. It is always produced as a complex mixture of hydrocarbons and formation water. 1 These mixtures undergo extreme agitation under high shear rate and turbulence as they flow from the reservoir pores through perforated casing into the wellbore, to the tubing and finally through the surface production facilities. This occurrence causes the water phase to be dispersed and stabilized as fine droplets in the bulk oil phase and hence forms emulsion...
ABSTRACT The number one killer disease in the world is Cardiovascular Disease1 . The most serious element of Cardiovascular Disease is Coronary Artery Disease. Currently, the main treatment for Coronary Artery Disease is stent placement surgery. However, its long time safety and efficiency are the major setbacks, as it is associated with late restenosis and late thrombosis. These are set caused by the durable polymeric film used as the drug carrier. To improve on the current treatment (stent...
ABSTRACT Gas condensate reservoirs are initially discovered as single-phase gas reservoirs. As the reservoir is produced below the fluid dew-point pressure, an increase in condensate saturation in the near wellbore region occur which reduces the relative permeability to gas and in turn causes productivity impairment. It is pertinent to predict condensate banking behavior accurately during a field’s operational phase to avoid problems with a well’s ability to attain production targets. Th...
ABSTRACT Binders are important components of electrodes of supercapacitors because of their ability to adhere active components and make the resultant slurry to adhere on current collectors. This work seeks to investigate the possibility of a bioactive polymer (chitosan) substituting the conventional fluoro-thermoplastic binders used in supercapacitors within the constraint of electrochemical characterizations. Chitosan based electrodes at 3% acetic acid concentration displayed the best elec...
ABSTRACT The production of formation sand is a problem associated with most oil deposits in the world. Major Sand production effects affect safety, well or field economics and continuous production. This has prompted the continued search for solutions to mitigate sand production in the oil and gas industry over time. The methodology often employed is through exclusive sand control or passive sand management. The ability to predict when a formation will fail and produce sand forms the basis a...
ABSTRACT The transportation of cuttings and efficient hole cleaning are indispensible in any drilling program. This is because a successful drilling operation is the key to a profitable business in the oil and gas sector. A successful drilling program is as a result of an efficiently cleaned hole. Cuttings transport efficiency in vertical and deviated wellbores has been reported to depend on the following factors: hole geometry and inclination, average fluid velocity, fluid flow regime, dril...