ABSTRACT Titanium alloy is popular in biomedical application owing to its low density, good biocompatibility (i.e. biological and chemical inertness) and excellent mechanical properties. Due to the high disparity between the implant and bone Young’s moduli, the alloy causes stress shielding in the body. Porous Ti alloy implants have proven to be effective in addressing this issue, so in this work, we created a porous Ti-6Al-4V implant by sieving the as-received Ti-6Al4V powder into differe...
Abstract Hydraulic fracturing is an effective well stimulation technique which is introduced in the 1950s and widely used in the oil and gas industry. Most of the works about hydraulic fracture assumed that the fracture is symmetric and either vertical or horizontal. But, several field and laboratory observations show very complex fractures, inclined, multi-segmented, asymmetric, and the presence of multiple fractures. The purpose of this study is to investigate the pressure behavior of a un...
Abstract Sodium-ion batteries (SIBs) have been identified as an effective technology for grid-scale energy storage because of relatively low cost and natural abundance of sodium, but the lack of suitable anode materials with high Coulombic efficiency and reversible capacity has been a challenge. While graphite, an anode material in Lithium-ion batteries (LIBs), has been used for storing Na ions, its performance in terms of efficiency and capacity has been unsatisfactory for practical applica...
ABSTRACT Existing data show that Portland cement material production contributes ~8% to the global CO2 emissions. This is detrimental to the environment and can lead to global warming. It is therefore pertinent to develop alternative cost-effective and environmentally friendly cement material. The geopolymerization technology presents a solution. This project is aimed at using a Nigerian metakaolin-based geopolymer as a sustainable alternative to Portland cement. Kaolin clay sourced from Kan...
ABSTRACT The Niger Delta is Nigeria’s and Africa’s most prolific producing basin and has some untapped oil resources because of their marginality. The development of marginal oil field in Nigeria has now become an important strategic issue. This is due to the vast availability of these fields scattered all over the Niger Delta. The Federal Government of Nigeria in a bid to kick-off indigenous participation in the upstream sector of the petroleum industry initiated the marginal field prog...
ABSTRACT Large quantities of petroleum resources in the Niger Delta province are confined to unconsolidated turbiditic and silici-clastic rocks. These rocks are usually associated with high volumes of shale. The high volumes of shale create discontinuities within the reservoir units causing division of the reservoir into several flow units. The complex nature of these reservoir units coupled with the incidence of many thin beds within them makes it difficult to conduct credible petrophysical...
ABSTRACT There is a need for efficient energy storage to meet the world’s continuous demand for energy. The electrical energy storage devices available are conventional capacitors, electrochemical supercapacitors, batteries and fuel cells. The electrode materials play an important role in improving the efficiency of energy storage systems such as batteries and electrochemical supercapacitors. The electrochemical supercapacitors have power densities greater than those of batteries, energy d...
ABSTRACT Materials selection is done regarding to the availability, cost and performance of the candidates. In buildings, cement is the material that is widely used, even though it is releases co2 (estimated about 7% of the worldwide production of co2). There is therefore a need to look for new materials that are more environmental friendly. Prior research on earth-based materials has shown that termite soil may serve as an alternative to cements in the stabilization of building materials. T...
ABSTRACT The analysis of the experimental data for the air-silicone oil plug-slug transition in a 67mm id and 6m long horizontal pipe was carried out in this work. The superficial gas and liquid velocity ranged from (0.05 – 4.73) m/s and (0.05 – 0.473) m/s respectively. The transition from plug to slug flow was investigated by increasing the superficial gas velocity at fixed superficial liquid velocity. For the investigated experimental data set, the intermittent flow was observed at the...
ABSTRACT This work aimed at using processed cassava leaves to pack cyanide mild steel (MS) under different treatment conditions and investigating the wear properties of the pack cyanided mild steel (PCMS). Pack cyaniding (PC) of a MS was achieved using processed cassava leaves powder with BaCO3 as energizer in the heat treatment process. Four different powder particle sizes were utilized at four different temperatures (750oC, 800oC, 850oC and 900oC) and soaked for 3 hours. In this present wo...
Abstract Uncertainty analysis of flow performance predictions involves identifying significant reservoir parameters impacting the flow response. Uncertainty analysis often requires conducting large number of reservoir simulation runs. In this work, experimental design theory (DoE), Response Surface Methodology (RSM) and numerical simulation were integrated to reduce the number of simulations and simplify the optimization process. Various investigators have applied DoE/RSM to approximate a co...
ABSTRACT New sources of energy should be found to relieve the high demand of energy. Even though heavy oil and bitumen are difficult to produce due to their high viscosity which can be reduced by heating, with increased oil price, the production of these heavy oils are seen viable thus the need for a model that would help make predictions for the future and also take into consideration areal and vertical sweep of hydrocarbons (3D simulator). The ability to be able to optimize the interaction...
ABSTRACT Niger Delta generates higher revenues for Nigeria through its abundant oil and gas resources. The region over the years has been faced with environmental challenges resulting from oil and gas operations. This study is aimed to evaluate the environmental impact of the oil and gas exploration and production on the socioeconomic life of the inhabitants of the Niger Delta. The data and analysis presented in this study relied solely on secondary data from past studies and reports from bo...
ABSTRACT Clastic reservoirs may be heterogeneous and exhibit lateral and vertical variations in porosity and permeability. Therefore, the spatial distribution of the petrophysical properties within the reservoirs is important to provide a reliable reservoir description. An improved understanding of clastic reservoirs has led to more detailed reservoir description by flow unit delineation. In this study, six active wells which cut across zone D3000 in the Tertiary Niger Delta clastic reservoi...
ABSTRACT Methanol is normally used in the oil and gas industries for inhibiting gas hydrate. Before use, the methanol is normally stored in tanks often made of carbon steels and stainless steels, and these tanks are prone to corrosion when exposed to methanol. Many investigations have been carried out by researchers to understand the phenomenon of stress corrosion cracking (SCC) in ethanol. Very few investigations have, however, been carried out on methanol stress corrosion cracking. Even th...