Browsing by Author "Akintola, S.A."

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Advancing sustainability of drilling fluid: coconut and shea butter oils as alternative to diesel
(Sciencedomain International, 2024) Akintola, S.A.; Ehwarieme, F.; Amaechi, I.
Drilling fluid is a key element in the drilling process because it lifts cuttings to the surface, maintains a stable wellbore, and generates sufficient hydrostatic pressure to prevent the influx of formation fluids into the wellbore. While oil-based drilling fluids offer advantages like wellbore stability, lubrication, and temperature resistance, disposing of oil-contaminated cuttings, particularly those using diesel, harms the environment. This study explores the use of coconut oil and shear butter oil, a renewable and biodegradable resource, as the base for oil-based drilling fluids. Two samples of coconut oil and shea butter oil-based mud samples were formulated and tested in the laboratory against the conventional crude oil-based mud. Laboratory tests compared each sample of coconut oil and shea butter oil-based mud against conventional diesel-based mud. Tests included FTIR characterization of additives, and evaluation of gel strengths, yield point, viscosity, and emulsion stability at 120°F and 300°F. Filtration loss and mud thickness were also measured. Results indicate that coconut oil and shea butter oil-based drilling fluids offer promising rheological properties and environmental benefits. Coconut oil-based sample (VCO I) exhibited superior viscosity and emulsion stability, though it produced a thicker mud cake, indicating a need for optimization. These alternatives present a viable solution to reduce the environmental impact of drilling operations. Further research and field trials are recommended for practical application.
Comparative analysis of the effect of plant-based and petroleum-based wax inhibition additives on heavy crude oil in the Niger-Delta
(Egyptian Petroleum Research Institute, 2025) Magashi, T.; Akintola, S.A.; Ebere, F.O.; Magashi, L.N.; Fulalo, L.D.
This study investigates the use of plant-based oils-soybean oil (SO), coconut oil (CO), and their biofuels, and petroleum distillates, namely automotive gas oil (AGO) and premium motor spirit (PMS) as potential wax inhibitors. At various volume concentrations (3 %, 5 %, 10 %), the impact of the additives on the pour point, rheology, and wax deposition of a heavy waxy crude oil sample from the Niger-Delta was investigated. The ASTM standard test procedures were used, using the cold finger apparatus for wax deposition test and paraffin inhibition efficiency determination. It was observed that though all the additives tested could reduce crude oil viscosity, SO and CO had the least effect compared with their biofuels and petroleum distillates (which had the greatest effect). PMS reduced the yield point (YP) significantly at all concentrations, while AGO reduced it only at a low concentration (3 %). The plant oils and biodieselts had a poor effect on YP. Again PMS had the most effect on pour point reduction, followed by AGO. SO and SO biodiesel (SOBD) showed a similar trend, raising the pour point at low concentrations, while reducing the same at higher concentrations. CO and COBD both reduced the pour point at all concentrations. The cold finger wax deposition test ultimately revealed that SO is a good wax crystal modifier. At a high concentration, its paraffin inhibition efficiency is almost comparable to that of AGO and PMS at reduced concentration. Its flow improvement property is however relatively poor, as it could not improve the YP and pour point of the crude oil significantly. In comparison with CO, however, SO shows greater potential for wax inhibition and flow improvement, while AGO and PMS show excellent results. The plant oil biodiesels (SOBD and COBD), however, showed more promise than the original plant oils (SO and CO) in flow improvement, but are less attractive in wax inhibition.
Corrosion rates of green novel hybrid conversion coating on aluminium 6061
(Elsevier B.V., 2020) Oki, M.; Adediran, A.A.; Ikubanni, P.P.; Adesina, O.S.; Adeleke, A.A.; Akintola, S.A.; Edoziuno, F.; Aleem, A.
The use of chromate conversion coatings have been limited by several protocols as a result of their carcinogenicity and toxicity towards humans and the environment. Searches are ongoing for chromate replacement in coating baths and processes. This paper describes the comparison among the corrosion rates of a novel hybrid conversion coating derived from water extracts of hibiscus sabdariffa calyx in conjunction with ammonium molybdate, a molybdate conversion coating and the so-called chromate conversion coating. Potentiodynamic polarization measurement in 3.5 wt% sodium chloride solution was employed in ranking the coatings as sabdariffa molybdate being more corrosion resistant than chromate, which in turn out performed molybdate.
Determination of the effect of Moringa oleifera seed on the rheological and filtration properties of water based mud
(Avanti Publishers, 2022) Akintola, S.A.; Oloyede, I.; Emmanuel, A.
A cost-effective and environmentally friendly biodegradable locally sourced alternative will be sought to reduce drilling fluid cost drilling operations. Moringa oleifera seed is a cheap, locally obtainable, and environmentally friendly additive. This study aims to determine the effect and suitability of locally processed Moringa oleifera seed powder (MSP) as an additive to improve the performance of water-based mud. The seeds were collected, prepared, and pulverized to a particle size of 75 microns. Varying concentrations (2.0, 4.0, 6.0, 8.0, and 10.0 g) of the MSP were used to treat a simple mud sample, and their properties were determined at varying temperatures (26°C, 40°C, 50°C, 60°C, 70°C) using American Petroleum Institute (API) standard procedures. Mud samples treated with Carboxymethyl cellulose (CMC) served as control. From the result, it was observed that the pH and the mud weight were not affected by MSP concentration. The mud sample plastic viscosity improved by 18% as MSP concentrations increased. The YP/PV ratios show an enhancement at all Moringa oleifera seed powder concentrations relative to the control mud except for the sharp decrease at 70°C. The test sample processed a greater fluid loss volume and filter cake thickness for all concentrations. The physical examination of the mud filter cake of the additive depicted that they have slippery, smooth, and soft mud cakes. The results elucidated MSP suitability in some traditional chemical materials in the oil and gas industry.
Economics of local materials as base fluids in the formulation of an oil based mud
(2019) Akintola, S.A.; Atere, E. B.
The use of drilling fluid is an important aspect in drilling operations as its critical to ensure a safe and productive oil or/ and gas well. In the bid to protect the environment and reduce environmental pollution resulting from drilling activities while using the No. 2 diesel, it is necessary to search for an alternative that will be suitable, locally available, easily affordable vegetable oils which is environmentally friendly and non-toxic as base fluid. This study is aimed at investigating the properties and economics analysis of the use of non-toxic, biodegradable locally obtainable oil from the palm kernel seed (Oil X) and coconut (Oil Y) as base fluid in the formulation of an Oil Based Mud. The rheological and filtration properties of the mud samples were evaluated using the API Recommended Standard, while the economics analysis was performed using the Net Present Value (NPV) and discounted profit to investment ratio (DPI) models. The results of the rheological, filtration and physiochemical properties for both X-OBM and Y-OBM, showed the possibility of the use of oil X or Y as base fluid as against No. 2 diesel. The result from the NPV model showed that the use of oil X or Y provided a higher NPV compared to those of No. 2 diesel mud even though the cost of No. 2 diesel was lower than those of X and Y oils. Also the discounted profit to investment ratio (DPI) was also better for mud formulated from the vegetable oil muds Although the initial cost of formulating mud samples using oil X or Y compared to No. 2 diesel Oil Base Muds (OBM) seems higher, consideration of their fire capacity resistance, nonimpact on the environmental and the cost of disposal of OBM the application of vegetable oil X or Y is more viable than No. 2 diesel in the industry
Effect of Guinea corn husk ash with the addition of basic oil well additives under downhole conditions on oil well cementing
(Elsevier Inc., 2023) Akintola, S.A.; Akintola, A.O.
Primary cementing is one of the most important aspects of completing an oil well. In Nigeria, most of the raw materials used are imported. There is therefore a need to source locally for feasible alternative raw materials which are available, cheap in conversion and environmentally friendly. The aim of this research is to investigate the effect of the partial replacement of Class G cement with Guinea Corn Husk Ash (GCHA) when cementing oil wells. Basic oil well additives are added during the process and the slurry is tested under downhole conditions. The compressive strength tests were carried out at Bottom Hole Circulating Temperature (BHCT) of 1400C using the Ultrasonic Cement Analyzer (Chandler- Model 4265). The fluid loss tests were carried out using the Filter Press (Chandler- Model 8340).The High Pressure High Temperature Consistometer (Chandler Model 8340) was used to obtain the thickening time of the various slurries and the rheological properties determined using the Rheometer. The result obtained from the various experiments conforms to the recommendations in the American Petroleum Institute recommended practice 10B –2/ISO 10426–2. The compressive strength values were more than 3.45 MPa. The Fluid Loss was below 5 x10-5m3. The Plastic Viscosities was in the range of 3.0 MPa.S – 10.0 MPa.S and the Yield Point was in the range of 10.0 lb/100ft2 – 30.0 lb/100ft2. The values of the thickening time were between 2.43 hrs and 11.53 hrs. More experiments should be carried out to determine the effect of GCHA on Class G cement Slurry as an extender when cementing oil wells.
Electron-optical and auger electron spectroscopy studies of a zirconium conversion coating on Aluminium
(Institute of Metals and Technology, Ljubljana, 2019) Adediran, A.A.; Oki, M.; Akintola, S.A.; Ogunsemi, B.; Akinlabi, E.T.
The techniques of scanning electron microscopy (SEM), transmission electron microscopy (TEM), ultramicrotomy and energy dispersive X-ray analysis (EDX) were employed to examine conversion coatings on aluminium developed from a zirconium nitrate/fluoride solution. The coating developed slowly on a microscopic metal substrate with islands of zirconium-rich centres within the coating matrix. According to the TEM assessment, the coating thickness was 30 nm for specimens treated for 60 s and 50 nm for those treated for 900s. The population of the zirconium-rich centers ranged from 2.8 × 1012 m–2 to 6 × 1012 m–2 over the treatment period. According to Auger-electron-spectroscopy in-depth analyses, the coating is composed of three diffused layers with an outer region of zirconium oxide followed by a layer of aluminium oxide/hydroxide and an inner layer at the metal/coating interface comprising compounds of aluminium and fluorides. The corrosion-resistance and paint-adhesion characteristics of the zirconium conversion coating are superior to those of bare aluminium.
Evaluation of drilling muds enhanced with modified starch for HPHT well applications
(Springer, 2020) Sulaimon, A.A.; Akintola, S.A.; Mohd Johari, A.B.M.; Isehunwa, S.O.
The use of carboxymethyl cellulose (CMC) in oil and gas well drilling operations has improved the filtration loss and mud cake properties of drilling muds. The introduction of starch has also reduced, for example, the viscosity, fluid loss, and mud cake properties of the drilling fluids. However, normal starch has some drawbacks such as low shear stress resistance, thermal decomposition, high retrogradation, and syneresis. Hence, starch modification, achieved through acetylation and carboxy-methylation, has been introduced to overcome these limitations. In this study, modified starches, from cassava and maize, were used to enhance the properties of water-based muds under high-pressure high temperature (HPHT) conditions, and their performances were compared with that of the CMC. The mud samples added with acetylated cassava or maize starch exhibited the smallest filtrate volumes and filtrate losses within the American Petroleum Institute specification. Therefore, these modified starch-added muds could replace CMC as fluid loss agents since, unlike it, they can withstand HPHT conditions.
Imidazolium-based ionic liquids as demulsifier for water-crude oil emulsion
(Elsevier Inc., 2022) Masri, A.N.; Sulaimon, A.A.; Zakaria, M.Z.; Akintola, S.A.
Most of the crude oils in the world are produced as water-crude oil emulsions. Removal of water from the emulsions is one of the major issues in industry and the process is completed before transportation and refining. One of the methods to remove water is through demulsification. In the present study, ionic liquids, non-volatile and non-toxic solvents, are used as demulsifiers. Three ionic liquids (ILs), namely 1-ethyl-3-methylimidazolium acetate (EMIM-AC), 1-butyl-3-methylimidazolium chloride (BMIM-Cl) and 1-butyl-3-methylimidazolium hydrogensulfate (BMIM-HSO4), were evaluated to treat a heterogeneous mixture of crude oil and water. The bottle tests were conducted at 60 °C and a salinity of 50,000ppm. Response surface methodology (RSM) was used to study the effect of IL type, its concentration, and residence time towards demulsification efficiency. The developed correlation gave a high correlation coefficient, R2 of 0.924. Analysis shows that the IL concentration gives the highest influence on the demulsification efficiency, followed by the residence time and the type of ionic liquid. Among the three ILs investigated, 1000ppm BMIM-HSO4 achieved the highest demulsification efficiency, where complete separation (100% demulsification efficiency) was attained within 30 minutes. BMIM-Cl achieved 72% efficiency after an hour while the EMIM-AC reached maximum separation after 52 minutes with 45% efficiency.
Improving the rheological and filtration properties of an invert emulsion mud using a locally sourced modified polymer
(2022) Akintola, S.A.; Sanusi, H.; Oyelola, C.
Drilling fluid is designed for easy to use, cost effective and environmentally friendly. Several studies have been carried out on the use of local materials such as starch as suitable substitute for imported additives. Due to this short coming resulting from the use of native starch, the potatoes starch was chemically modified using the process of graft copolymerization, before being investigated as an additive for treatment of invert emulsion drilling. Three mud samples labelled (Base fluid, Copolymer 1 and Copolymer 2) were prepared and diesel labelled Base fluid served as control. Varying concentration of additives (1.0 and 2.0 g) were used at added to the different mud samples and laboratory study was carried out using the API Recommended Practice at varying temperature. This study is aimed at improving the properties of an invert emulsion mud using chemically modified locally sourced pomoea batatas as additive
Improving the rheological and filtration properties of an invert emulsion mud using a locally sourced modified polymer
(AJSER Journal, 2022) Akintola, S.A.; Sanusi, H.; Oyelola, C.
Drilling fluid is designed for easy to use, cost effective and environmentally friendly. Several studies have been carried out on the use of local materials such as starch as suitable substitute for imported additives. Due to this short coming resulting from the use of native starch, the potatoes starch was chemically modified using the process of graft copolymerization, before being investigated as an additive for treatment of invert emulsion drilling. Three mud samples labelled (Base fluid, Copolymer 1 and Copolymer 2) were prepared and diesel labelled Base fluid served as control. Varying concentration of additives (1.0 and 2.0 g) were used at added to the different mud samples and laboratory study was carried out using the API Recommended Practice at varying temperature. This study is aimed at improving the properties of an invert emulsion mud using chemically modified locally sourced pomoea batatas as additive.
Investigating the effect of palm kernel shell powder on the rheological and filtration properties of water based mud
(Science Publishing Group, 2024) Akintola, S.A.; James, O.T.; Fatai, O.A.
During drilling operations, the use of drilling fluid plays a critical role, and over time, there has been considerable interest in enhancing drilling fluid characteristics in order to improve performance, reduce costs, and prevent environmental pollution. Deviating from conventional additives, recent studies have explored the use of alternative materials, as drilling fluid additives. In line with this trend, this study focuses on the laboratory investigation of the rheological and filtration properties of water-based drilling fluid treated with Palm Kernel Shell Powder (PKSP) with high viscosity polyanionic cellulose (PAC HV), used as control. To assess the impact of PKSP in water-based mud, experiments were carried out using concentrations spanning from 0.5g to 2.5g, temperatures of 27°C, 40°C, 60°C, and 80°C, and aging of 24, 48, and 72 hours. From the results the plastic viscosity of mud samples treated with PKSP were temperature dependent and also with increasing aging. The addition of PKSP showed improved performance in terms of reducing the filtrate volume as well as the cake thickness with increasing concentration of the additives, and the concentration that gave the best results across all aging duration was 2.5g. The mud weight and pH of all samples remained relatively constant, with no significant changes observed. However, PAC HV showed better results in all the cases of fluid loss and mud cake thickness. It could be attributed to the soluble contents in the PAC HV which increased the viscosity significantly and thus, kept the solid particles in suspension.
Investigating the effectiveness of Tiger-Nut oil (Cyperus esculentus L.) as base fluid in synthetic-based mud
(Services for Science and Education – United Kingdom, 2023) Ehwarieme, F.; Akintola, S.A.
Due to the environmental effects and following the stringent regulations on drilling operations and the associated drilled cutting disposal, drilling fluid with less environmental impact are highly desirable over the conventional diesel-based mud. This study seeks to determine the effect of ester derived from the oil of tiger nut using alkali catalyzed transesterification as base fluid for the formulation of a synthetic base mud. A total of four mud samples were formulated, three samples of 10ppg synthetic based muds were formulated using the ester at 70:30, 75:25, and 80:20 Oil-water ratio. The last mud sample was formulated using diesel as base fluid but at 75:25 Oil-water ratio. The fresh oil and its ester were characterized. The tiger nut ester was purified and the compositional analysis of the ester was carried out using the Fourier transform infrared spectrometry. The API recommended procedure was used to determine the mud samples density, rheological, filtration and emulsion properties. The result of the FTIR shows an absorption band at 1743.56 cm-1 indicates the presence of C=O of an ester. The result of the density of the fresh Tiger Nut Oil (TNO) and the ester are 0.98 and 0.87respectively, the viscosities are 25.7cp and 3.25cp respectively, the flash point and pour point are 173oC and -25oC, and 160oC and -15oC respectively. The plastic viscosity and yield point of the synthetic based mud ranges between 7.0cp to 16.0cp and 9.0lb/100sqft to 46.0lb/100sqft, while 9.0cp to 14.0cp and 20lb/100sqft to 27lb/l00sqft was measured for diesel oil-based mud. The filtrate volume and mud cake thickness for the synthetic based mud at 70:30, 75:25, and 80:20 oil-water ratio are 2.6ml and 1.2mm, 3.8ml and 1.1mm, 4.1ml and 1,0mm respectively, while 15.6 and 5mm were recorded for diesel oil based mud. The gel strength at 10sec and 10min of the synthetic based mud ranges between 6.0 and 11.0, while 7.0 and 8.0 were recorded for the oil-based mud. These result shows that the ester based synthetic oil compared favorably with diesel in the formulation of drilling mud. From the result, it is observed that esterified TNO can as a base fluid for a synthetic base mud, but further research on the most cost-effective way of producing the oil from tiger nut.
Modelling the effects of modified local starches on the rheological and filtration properties of a water – based drilling fluid
(Center for Enhancing Knowledge, 2021) Akintola, S.A.; Isehunwa, S.O.
This study is designed for the comparative analysis of chemically modified local starches used as additive in improving the rheological and fluid loss properties of a water- based drilling fluid. Additives are added to a drilling fluid in order to enhance the various functions of the drilling mud. Different drilling fluid samples were formulated without additive and with various concentrations modified starches. A laboratory investigation on the drilling fluid rheological and filtration properties using the API recommended standard procedures, pressure were studied at 1000 psi with a temperature range of 40.0 to 180.0°C, using a High Pressure High Temperature, (HTHP) rheometer and Fann Model 35A respectively From the analyses of the experimental results, it was observed that effective viscosity, plastic viscosity and yield point decrease steadily with increase in temperature. The experimental results, water based drilling fluid treated with chemically modified local starches improves the filtration and rheological properties of the drilling mud. Finally, this paper also presents a predictive model equation good enough to analyse trends and predict future values for effective and plastic viscosities.
Performance evaluation and application of apparent viscosity models based on marsh funnel viscosity and mud density using high-temperature high-pressure field data
(Melbourne Scientific Publishers, 2024) Ekanem, P.E.; Akintola, S.A.
The exponential increase in global demand for energy has necessitated increased oil and gas operations in harsh terrains. This in turn requires high-level precision in operations as errors may lead to great implications on cost and resources. Drilling fluid plays a key role in the success of every oil and gas drilling operation. Therefore, monitoring and engineering of drilling fluid in real time to ensure its sustained suitability as it goes through different formations and conditions remain a priority. Different mathematical models have been researched to complement this effort. However, practical application of these models has not been addressed, creating a gap between theoretical solutions and practical applications. Field data from five different wells were used to evaluate the performance of five models in predicting the apparent viscosity of drilling fluids based on marsh funnel and mud density test results. The best prediction had root mean square errors of 2.57; R-squared of 0.71; mean absolute percentage error of 5%; and mean absolute error of 2.16. It was found that mathematical models could be used to predict apparent viscosity with high accuracy and that the models could be used to identify regions of concern during the drilling process by a simple history matching and comparing of the performance of the models on previous data using a particular model and comparing the result with results from other models to observe patterns. This work, for the first time, gives a practical application of mathematical models based on marsh funnel and mud density tests.
Performance Evaluation of Delonix regia sawdust as cement retarder in oil and gas well
(SCIENCEDOMAIN international, 2024) Akintola, S.A.; Kolajo, T.; Obande, A.
Sawdust, a byproduct of wood exploitation and processing, poses environmental pollution risks if not managed appropriately. Its substantial carbon footprint can lead to pollution, habitat disruption, and fire hazards. However, repurposing sawdust as a chemical additive in cement slurry within the oil and gas industry offers an environmentally friendly solution. This practice aligns with sustainability goals, enhances cement slurry properties, promotes wellbore stability, and replaces more hazardous additives, thereby reducing environmental impact. This study is aimed at the production of a retarder (sodium lignin) from sawdust waste obtained from the Delonix regia species, and examining its effect on the thickening time/consistency, compressive strength, and rheological properties on the slurry of a Class G cement At a Bottom Hole Circulating Temperature (BHCT) of 90°C, thickening time tests conducted on the slurry samples revealed that as the concentration of the locally synthesized retarder increases, the thickening time of the concrete also increases, with minimal effect on compressive strength. The optimal thickening time result of 6 hours and 13 minutes was achieved with 0.5% Sodium Lignin (Retarder from Delonix regia sawdust) replacing a portion of the cement. At a bottomhole static temperature (BHST) of 100°C, increasing the concentration of the formulated sample led to higher Plastic Viscosities (PV) and yield points in the slurries. The findings indicate that slurries formulated with sodium lignin maintain viscosities within recommended values, making them suitable for pumping.
Pressure drop determination for multiphase flow in a vertical well tubing
(Stephy Publishers, 2021) Akintola, S.A.; Olakunle, F.
Several studies have been carried out, by researchers to predict multiphase flow pressure drop in the oil and gas industry, but yet there seems to be one being generally acceptable for accurate prediction of pressure drop. This is as a result of some constraints in each of these models, which makes the pressure drop predicted by the model far from accurate when compared to measured data from the field. This study is aimed at develop[1]ing a multiphase fluid flow model in a vertical tubing using the Duns and Ros flow model. Data from six wells were utilized in this study and results obtained from the Modified model compared with that of Duns and Ros model along other models. From the result, it was observed that the newly developed model (Modified Duns and Ros Model) gives more accurate result with a R-squared value of 0.9936 over the other models. The Modified model however, is limited by the choice of correlations used in the computation of fluid properties.
Scanning and transmission electron microscopy examinations of composite hybrid chromate and chromate phosphate conversion coatings exposed in hot 100% relative humidity environments
(Elsevier B. V., 2023) Ikubanni, P.P.; Oki, M.; Adediran, A.A.; Akintola, S.A.; Adeleke, A.A.
Conversion coatings are sine qua non in the finishing of aluminium alloys. They may be put into service without coating of paints. However, for aesthetics in architectural applications, paint overcoat is common. Chromate phosphate coatings are relatively less toxic than chromate which gained the pride of place until recently. Thus, aluminium specimens coated with hybrid chromate/phosphate conversion coatings have been subjected to 100% relative humidity for 480 h at 313K in comparison to chromate coatings and bare aluminium. Scanning electron microscopy examination revealed that initial dried river bed morphologies on coated specimens were obliterated. The friable outer coatings collapsed into the cracks/environment leaving a relatively smooth surface after exposure. Additionally, transmission electron microscopy of sections before and after exposure revealed similar texture and morphological striations nearly parallel to each other throughout the length of the coatings to the metal/coating interface. These were not disrupted as well as the metal/coating interface which remained relatively smooth with no visible corrosion products after exposure. Thus, the coatings formed effective barrier between the substrate and the relatively harsh environment. From EDS, elemental compositions were the same albeit, spectral intensities remained relatively constant after humidity exposure regimes. The coatings are made up of either Cr, O and Al for chromate and Cr, P, O and Al for chromate/phosphate. At deliberately breached regions, the coatings prevented spread of corrosion and paint delamination over the substrates. On the other hand, bare aluminium was decorated with mounds of hydrated aluminium oxide/hydroxide after exposure as revealed in the SEM/TEM.
Screening of ionic liquids for CO2 capture using data analytics techniques
(UTP Press , Malaysia, 2023) Sulaimon, A.A.; Salang, A.R.T.; Qasim, A.; Akintola, S.A.; Wifred, C.D.A.P.
Carbon dioxide (CO2) is the most prominent greenhouse gas (GHG) present in the atmosphere, making it the most accountable for global warming. CO2 capture is capable of greatly reducing carbon emissions. The current method of CO2 capture by amine-based solvent has drawbacks, such as high demand for energy and intense corrosion, making it a less reliable method. More attention is given to ionic liquids (ILs) for their negligible vapour pressure, low melting point, and high chemical and thermal stability advantage. This study uses data analytics techniques to develop a predictive model for screening ILs for CO2 capture, moving away from the experimental approach, which is burdensome, costly, and less environmental-friendly. Data on the properties and parameters of ILs are collected from COSMO-RS software. CO2 solubility is the function of collected data and developed into 15 models of three different methods: Support Vector Machine (SVM), Neural Networks (NN), and Gaussian Process Regression (GPR). The use of data analytics in this field is new and can provide valuable insight towards CO2 solubility in ILs. The dataset is distributed randomly at 80/20% for training and testing. Each model is evaluated using R-squared and root mean square error (RMSE). The rational Quadratic GPR model shows the lowest RMSE of 0.0002 for training and testing, with R-squared the closest to one. Rational Quadratic GPR is the best model to be used for screening IL for CO2 capture.
Sterilized chicken feather as eco-friendly corrosion inhibitor for mild steel in a water-based drilling mud–gravimetric and FTIR assessment
(Sciencedomain International, 2024) Akintola, S.A.; Aleem, A.A.; Oki, M.; Ikubanni, P.P.; Adediran, A.A.; Esabunor, O.R.
This research evaluated the corrosion performance of mild steel in sterilized and unsterilized alkaline mud corroding systems using chicken feather powder (CFP) obtained through the usual hydrolysis and acid neutralization protocol. Insightfully, gravimetric analysis revealed that bacterial infestation of the unsterilized environment caused its corrosion performance to be lower at 10.3% while the sterilized counterpart stood at 49% at 92 days of exposure to the environments respectively. The functional groups, C=N, O=C=O, H-C=O etc, revealed by FTIR to be present in the protein saturated feather were overwhelmed by microbial activities rendering them inactive to perform as inhibitors.