African University of Science and Technology
https://repository.aust.edu.ng:443/xmlui
The DSpace digital repository system captures, stores, indexes, preserves, and distributes digital research material.2024-03-29T11:55:15ZBook of Abstracts
http://repository.aust.edu.ng/xmlui/handle/123456789/5141
Book of Abstracts
Akpan, L. Morgan
According to the International Energy Agency (IEA), the average amount of minerals required for a new power generation unit has
increased by more than 50% over the years due to the rise in the share of renewable energy sources in the global energy mix. From this singular indicator, it is evident that the demand for minerals needed to manufacture and sustain power generation systems to achieve the global agenda on energy transition will continue to rise. Given that the low-emission energy and transportation systems are more mineral-intensive than their fossil fuel counterparts, the energy transition window provides a great opportunity for the solid
minerals subsector. Further, as the world population grows, the infrastructure needed to meet the demands for transportation, housing, clean water, sanitation, etc. will continue to increase the need for solid minerals. While lithium presently enjoys the fastest growth rate in terms of demand, it is projected that the global demand for mineral resources required to satisfy technological and industrial applications by 2040 will be dominated by graphite, copper, and nickel. Nigeria is endowed with significant mineral resources, but most remain untapped. In a report published by the African Development Bank (AfDB) in 2019, it was stated that the mining sector in Nigeria accounted for only 0.5% of the GDP and a paltry 0.3% of employment. These numbers are a far cry from what they should be, going by the enormous solid mineral resources that the country is endowed with. Recent records have it that the Ministry of Mines and Steel Development (MMSD) in Nigeria has identified more than 40 unexploited solid minerals in commercial quantity across the country. It is estimated that Africa accounts for about 30% of all global mineral reserves. But due to the emphasis on the export of raw materials in the continent, the region is yet to derive full benefits from these natural endowments as evident in the low foreign exchange earnings from the subsector across the continent as well as lower employment levels in the sector compared to other resource-rich countries in North America, Europe, Asia, and Australia. Indeed, solid minerals are gradually becoming a “resource curse”, with dire health and environmental consequences as seen in DR Congo and other countries in the region. Using Nigeria as a reference, among the issues impeding the sub-Saharan Africa region’s aspiration of using solid mineral resources to diversify its economy include a lack of indigenous capacity, inadequate policy and analytical systems, lack of equipment, infrastructural deficit, security threats, etc. Industrialized countries that have good governance and socioeconomic base to deliver goods and services to their citizens usually place a strong emphasis on tertiary education, research, technology diffusion, and the appropriate policy mix that encourages innovation.
This is the route that African countries must take to turn around the socio-economic fortunes of the continent.
ACMED 1ST COSMIRTEP 2023 provides a platform to articulate research results, policy options, and socioeconomic dynamics with
which African countries can make informed decisions in the area of solid minerals and mining which is unanimously agreed to hold great
potential for the continent in terms of job creation, income generation through foreign exchange, foreign direct investment, poverty
reduction, among others. In line with one of our core mandates as a regional research-focused University which is to generate and
disseminate knowledge and information which are critical for African renaissance and economic growth in the 21st century, this
International conference is organized by the African Centre for Mineral Exploration and Development (ACMED), a research-focused
center was established and domiciled in the African University of Science and Technology (AUST), Abuja, Nigeria to engage stakeholders in the analysis of the challenges, prospects, and opportunities in the solid mineral subsector across the continent. The challenges that
confront Africa’s solid mineral subsector are also opportunities for the generation and enfranchisement of knowledge to address them.
This conference presents an opportunity to network and harness the enormous knowledge base of Africans at home and in the diaspora
with the ultimate goal of using solid mineral resources as one of the instruments for the socioeconomic transformation of the continent. The
issues raised in this rationale informed the objectives of the Conference which are as follows:
• To identify, synthesize, and analyze the factors impeding sustainable and optimum utilization of solid mineral resources in Africa
and proffer solutions to them
• To engage researchers/experts, policymakers, politicians, investors, innovators, and other stakeholders in the analysis of the
challenges and opportunities presented by the solid mineral subsector under the global energy transition
• To provide a platform for stakeholders, including Africans in the diaspora, professional societies, public institutions, private
sector, academic institutions, and students to identify deficiencies and opportunities recommend solutions, and initiate
collaborative projects and programs on sustainable and optimal utilization of solid minerals for the attainment of Sustainable
Development Goals (SDGs) in the continent.
To provide an opportunity for research partnerships, bilateral cooperation, networking, business matching, signing of agreements and partnerships, etc. among the stakeholders in the Sector.
2023-11-29T00:00:00ZReservoir Simulation Framework to Support Marginal Field Development Planning
http://repository.aust.edu.ng/xmlui/handle/123456789/5138
Reservoir Simulation Framework to Support Marginal Field Development Planning
Akpobasaha, Oghenerobor
Dynamic simulators are practical tools used in the oil and gas industry to help make informed decisions, optimize production, reduce risks, and maximize hydrocarbon recovery. They are fundamental for the success and profitability of oil and gas operations, playing a vital role in reservoir engineering and management practices. The objective of this study is to propose an optimal development framework for a marginal field located offshore in the southeast Niger Delta, where only available data are from neighboring fields. The process involves estimating volumes of hydrocarbon-bearing sands through reservoir characterization and static modeling, developing a simulation model, and using it, along with decline curve analysis, to estimate produced hydrocarbon volumes. Next, production constraints are formulated for infill wells using a well simulator to determine optimal flow rates and tubing sizes. An optimized production strategy is then developed by analyzing the sensitivity of the constraints and parameters to oil recovery. Sensitivity analyses were conducted on Tubing Head Pressure (THP) and injection rates to identify the most effective production strategy throughout
the 15-year life of field Finally, an economic analysis is performed to assess the project profitability. The study also includes identifying and assessing the environmental, subsurface, and surface risks associated with the field development plan. Based on these findings, it is recommended that the proposed reservoir simulation framework used in the Ratson Sand C project can be applied to similar fields to achieve maximum recovery.
Main Thesis
2023-05-05T00:00:00ZAB Initio Study of Surface Energy, Surface Stress and Coupling Coefficient of Au (111)
http://repository.aust.edu.ng/xmlui/handle/123456789/5137
AB Initio Study of Surface Energy, Surface Stress and Coupling Coefficient of Au (111)
Shehu, Mustapha
This study investigates ab initio exploration of the Au (111) surface within the generalized gradient approximation, with a primary focus on assessing the convergence properties of this noble metal. An in-depth analysis of the material's response to various computational parameters, including cutoff energy, K-point sampling, and lattice parameter, was conducted to ensure the reliability and consistency of the findings. The theoretical determination of the lattice constant, yielding a value of 4.059 Å, not only aligns quantitatively with experimental measurements but also agrees with calculated values. A noteworthy aspect of this investigation involves reporting on the work
function's response to strain, shedding light on how this essential property evolves under external
influences. Additionally, the study evaluates the variation of energy per unit cell with varying slab
thickness, providing insights into the material's behavior across different structural configurations. The results reveal that Au (111) exhibits a surface energy of 0.5561 𝑒𝑉Å−1, surface stress of 0.18177 𝑒𝑉Å−2and a coupling coefficient of 1.145 eV. These results provides significant implications for understanding the mechanisms associated with electrochemical coupling at an atomic scale, offering crucial insights into the material's behavior across diverse atomic and electronic structures. Thus this work contribute to the understanding of Au (111) surface properties, laying a foundation for advancements in understanding electrochemical phenomena and fostering the development of tailored applications in materials science and nanotechnology.
Main Thesis
2023-12-10T00:00:00ZThe Auman Integral of Set-Valued Maps
http://repository.aust.edu.ng/xmlui/handle/123456789/5136
The Auman Integral of Set-Valued Maps
Eleh, Chinedu Anthony
This thesis focuses on the Aumann integral of set-valued random variables and its properties. We started o by studying the space in which this integral lies: hyperspace endowed with the Hausdor metric. We considered convergence on a hyperspace with respect to the Hausdor metric and reviewed the works of Kuratowski, Mosco in trying to abstract topologically, the Hausdor convergence; this led to a comparison between weak, Wijsmann, Kuratowski-Mosco convergences to Hausdor convergence. We proceeded to see the conditions under which a set-valued random variable is measurable, integrable and integrably bounded. Finally, we de ned the class of integrable selections of an integrable set-valued random variable and used it to de ne the Aumann integral, and went further to prove and outline su cient conditions for the Aumann integral to be convex and closed-valued respectively
Main Thesis
2018-05-15T00:00:00Z