Conference Presentations by Toyese OYEGOKE
NIPES Journal of Science and Technology Research 2, 2020
The effects of particle sizes and extraction time on the solvent extraction of oleoresin were stu... more The effects of particle sizes and extraction time on the solvent extraction of oleoresin were studied to obtain data for process control and optimization. Extraction was carried out using ethanol as a solvent and at a constant temperature of 40oC. Ginger particle sizes considered were 1200, 850, 600, 425 and 250 microns at extraction times of 10, 20, 30, 40, 50, 60 and 70 minutes. Experimental data generated were fitted to an empirical model to determine the kinetic parameters. It was found that, for each particle size, the yield of oleoresin increased with increasing extraction time up to an optimum time after which the yield remained constant. Also, the optimum extraction was found to have increased with decreasing particle size. Furthermore, the maximum oleoresin yield was found to be dependent on particle size, viz-a-viz, smaller particle sizes favored greater yield. These results were reflected in the constants of the Patricelli equation (K and τ). Fitting the experimental data to the empirical model indicated a good fit as represented by the R2 values. The ginger extract was characterized using FTIR.
Journal of Engineering Studies and Research, 2020
Apart from the environmental threats posed by fossil fuel due to emissions of greenhouse gases (m... more Apart from the environmental threats posed by fossil fuel due to emissions of greenhouse gases (majorly CO2), Nigeria's economy's continuous reliance on only one source of fuel production is unsustainable, hence, the need to consider diversification and alternative sources of energy generation and fuel production. This work aims to model and simulate the process of transforming sorghum bagasse into a fuel grade bioethanol via the use of Aspen HYSYS and MATLAB for the development and evaluation of cost implications and demand of the concerned plant studied. The study of process plant models shows that 189 g of fuel grade bioethanol will be obtainable from a kilogram of sorghum bagasse based on the condition employed in the modeling of the process. Cost analysis indicates that it would require a capital and operation cost worth of $1.92 and $ 0.83, respectively, to produce a liter of fuel grade bioethanol from sorghum bagasse.
Nigeria Engineering Conference, 2018
A study was carried out on process simulation and economic analysis of bioethanol production from... more A study was carried out on process simulation and economic analysis of bioethanol production from molasses in Nigeria with the aid of a process simulator (Aspen HYSYS) and computational software (MATLAB and MS-Excel). This study entails simulation of the process plant; material and energy balances; parametric study of some selected unit and economic analysis of the plant. The simulated process plant was found to produce 86 million liters of fuel bioethanol per annum from 583 metric kilotonnes of cane molasses per annum while the plant equipment cost, total capital cost of setting-up the plant and the annual cost of producing bioethanol were found to be 1.4, 9.0 and 45.41 million dollars respectively. The parametric study carried-out showed that the minimum number of trays at the distillation column for maximum purity is 40. The findings made from the profitability analysis of the plant shows that bioethanol production in Nigeria would not be economically feasible if bioethanol is sold at the same price as gasoline ($0.40 /L). Bioethanol production from molasses was found to involve high cost of production ($ 0.59 /L) which is relatively higher than the gasoline selling price ($ 0.40 /L) which brings about a poor net present worth, return on investment and a large payback period. However, this study identified that the project will be economically feasible if the cost of molasses is lowered, government implementing a 20-40 % subsidy or a significant decline of Dollar to Naira exchange rate.
Papers by Toyese OYEGOKE
Carbon trends, Jun 1, 2024
Žurnal ìnženernih nauk, 2024
The critical role of process simulation in modern chemical engineering cannot be overstated, with... more The critical role of process simulation in modern chemical engineering cannot be overstated, with its capacity to facilitate process scale-up, assess alternative designs, and comprehend plant efficiency. This research delves into the performance of three software programs, Cape-Open to Cape-Open (CC), DWSim, and Aspen HYSYS (AH), in modeling butane dehydrogenation. The focus is on their ability to accurately model thermodynamic properties and chemical reaction dynamics. Butane dehydrogenation was evaluated with specific thermodynamic parameters using a Gibbs reactor model with Gibbs minimization. The Soave Redlich-Kwong thermodynamic model was employed to investigate the impact of temperature of 700 °C and pressures of 0.1 MPa and 1.0 MPa on the yield and selectivity of butadiene and butene. The CC and AH simulation results closely agreed with the available experimental data. The consistency of freeware simulators with a commercial simulator was also assessed, with AH serving as the reference standard. It was revealed that CC demonstrates higher consistency with it than DWSim under both low-and highpressure conditions. This study confirms that CC is a reliable process simulator suitable for use in resource-constrained settings where expensive commercial licenses are prohibitive.
Pure and applied chemistry, Mar 12, 2024
Research Square (Research Square), Feb 6, 2024
Journal of the Pakistan Institute of Chemical Engineers, Nov 13, 2022
Pure and applied chemistry, Feb 15, 2024
Physical Sciences Reviews
Propene is a vital feedstock in the petrochemical industry with a vast range of applications. And... more Propene is a vital feedstock in the petrochemical industry with a vast range of applications. And there is a continuous rise in propene demand. To gain insight into how the on-purpose method could help meet the demand in the propene market, we investigated the impact of temperature (T) and pressure (P) on product distribution in terms of product yield and selectivity using the process simulation approach. Existing related studies were deployed to identify possible products that could be evaluated in the simulation. In the study, we used Gibbs minimization (with Gibb’s reactor) to predict the likely products obtained at different T and P. The impact of feed purity on product distribution was also evaluated. The study was aided by using the Aspen HYSYS process simulator, while Design Expert was used to search for the optimum conditions for higher conversion, yield, and selectivity. Results obtained for the modeling and simulation of the process show that operating the production proce...
Chemical Product and Process Modeling
It is impossible to overstate the value of process simulators in teaching process engineers about... more It is impossible to overstate the value of process simulators in teaching process engineers about petrochemical, chemical, nuclear, and biological processes. Several chemical engineering topics, including process design, thermodynamics, process integration, separation processes, safety, and others, are made easier to teach because of this. Only a handful of these process simulators are freeware, while most are largely commercial. The ones that are commercialized are renowned for their friendliness, extensive media coverage, and international credibility attained for their forecasts in several industrial applications. However, schools in low-income countries may not be able to buy them. In contrast, the freeware publicity is not relatively low, less friendly, and cheaper than the commercial ones. This research compares the agreement of the forecast of commercial process simulators with freeware ones in an effort to strengthen institutions’ trust in the prediction of freeware process ...
Ukrainian Journal of Educational Studies and Information Technology
This research examines the effectiveness of the existing ICT schools, the feasibility of planting... more This research examines the effectiveness of the existing ICT schools, the feasibility of planting a well-established, curriculum-based, and practical-oriented ICT school in Funtua through SWOT analysis. Descriptive research of the survey type design was used in the study. The population for this study involved all the proprietors/proprietresses, students, and teachers of the existing 10 ICT/Computer schools. A random sampling method was adopted in selecting the samples targeted. The targeted population samples were 35 students, 15 teachers, and 10 proprietors from 6 existing ICT/Computer Schools and prospective students (or residents) in Funtua Metropolis, Katsina State, Nigeria. A self-designed research instrument was used to collect data for the study. Data collected were subjected to analysis, where the research questions suggesting the respondents’, opinions were evaluated via their mean and standard deviation. The responses/opinion with mean less than 3.5 were rejected while ot...
Kemija u industriji
The impact of molybdenum (Mo) and tungsten (W) on improving the catalytic characteristics of the ... more The impact of molybdenum (Mo) and tungsten (W) on improving the catalytic characteristics of the chromium-based catalyst, Cr 2 O 3 , was explored in this study. The use of semi-empirical and density functional theory computational methods was deployed to understand the impact of the substitution of the chromium (Cr) with Mo and W on the catalyst, CrXO 3 (where X = Cr, Mo, W) in the production of propylene from propane. Findings from the investigation confirmed that the surface modified with Mo showed better potential for improving the catalyst selectivity, retarding propylene dehydrogenation, cracking, and coking path than W, which offered a lower selectivity. The use of Mo was found to have better facilitated the propylene production due to its lower affinity for coke and cracking promoting adsorbates accounted for its sites, including easier desorption of propylene and higher barrier of deep dehydrogenation for preventing the production of undesired products, unlike the use of W. This study, therefore, recommends the use of Mo for the improvement of the catalyst that could result in better propylene yield, which could aid in meeting its rising market demand.
European Journal of Materials Science and Engineering
The huge cost of energy associated with the breaking down of high molecular weight rubber during ... more The huge cost of energy associated with the breaking down of high molecular weight rubber during adhesive production has placed a demand for alternative processing technology. In this study, the use of benzoyl peroxide as a peptizer to lower the molecular weight of natural rubber has been reported. The properties of natural rubber-based solvent adhesive produced by mechanical mastication and peptizer were also compared. Natural rubber (NR) was masticated in a two-roll mill at 80oC for 30 mins and was processed into adhesive using xylene as solvent. Similarly, adhesives were formulated by chemical break down of the heavy natural rubber molecules using benzoyl peroxide as peptizer. The peptizer loading was varied from 0.2 – 1.0 parts per hundred rubber (phr) of rubber at 100oC in a water bath while other compounding additives were kept constants for all samples under study. The adhesives produced were subjected to the following test: viscosity, lap shear test, T-peel test and drying t...
The Islamic University Journal of Applied Sciences (JESC), May 6, 2021
Journal of Engineering Sciences, 2021
Four different mixing rules (MRs) in three equations of state (EOSs) have been used to account fo... more Four different mixing rules (MRs) in three equations of state (EOSs) have been used to account for the intermolecular forces of attraction between dissimilar molecules of different substances that form simple mixtures. The combined effects of the co-volumes of all constituent species of the mixtures were also considered, and the densities of these simple mixtures were predicted. Thereafter, the density results obtained were compared with accurately simulated experimental density values, and the effectiveness of these MRs was determined and compared. The four MRs compared are geometric mean average (GMA), whole square root average (SRA), Expanded geometric average (EGA), and simple average (SA) of attractive force parameter. They were all used in Van der Waals, Redlich Kwong, and Peng Robinson EOSs for two simple mixtures: a binary system (Ammonia – Water system) and a ternary mixture (methyl acetate – water – toluene system). It was found that GMA and EGA gave reasonably accurate es...
In this study, an adsorbent was developed for the treatment of industrial wastewater using the ka... more In this study, an adsorbent was developed for the treatment of industrial wastewater using the kaolin sourced from Bauchi, Nigeria. The derived adsorbent was employed in the removal of chromium metal from simulated industrial wastewater. Some batch adsorption experiments were conducted for the treatment of wastewater after which the effects of pH, adsorbent dosage, contact time and initial concentration on adsorption were investigated. The finding from the studies indicated that kaolinite clay is a promising adsorbent for the removal of chromium from wastewater due to its high adsorption capacity. The adsorption process was found to be strongly dependent on the pH of the metal solution and the maximum chromium adsorption was observed at pH 6. In the assessment of concentration effects, 99.77% was found to be the highest removal efficiency. Relatively, required adsorbent dose of 0.20 g. The contact time for effective chromium removal was 30 min.
This book contains a research work which adopted Factorial Design technique together with API Spe... more This book contains a research work which adopted Factorial Design technique together with API Specification for testing and procedures so as to provide great flexibility for exploring or enhancing the treatment of local clay and formulation of water based mud drilling in diverse ways in oilfield services. Moreover, the models developed from this research devised means of evaluating each main effects and interactions effects on the treatment of local clay so as to determine the best required treatment for the local clay and thereby optimize the whole process in order to produce the best drilling fluid formulation. This models developed has also been confirmed to be a means of saving time, cost and rigorous procedures in the laboratory in the process of obtaining drilling mud flow properties.
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Conference Presentations by Toyese OYEGOKE
Papers by Toyese OYEGOKE