Bulk Oil Research Articles

GLSD: a global large-scale ship database with baseline evaluations

ABSTRACT In this paper, we introduce a challenging Global Large-scale Ship Database (GLSD), designed specifically for ship detection tasks. The designed GLSD database includes a total of 212,357 annotated instances from 152,576 images. Based on the collected images, we propose 13 ship categories that widely exist in international routes. These categories include Sailing boat, Fishing boat, Passenger ship, Warship, General cargo ship, Container ship, Bulk cargo carrier, Barge, Ore carrier, Speed boat, Canoe, Oil carrier, and Tug. The motivations for developing GLSD include the following: 1) providing a refined and extensive ship detection database that benefits the object detection community, 2) establishing a database with exhaustive labels (bounding boxes and ship class categories) in a uniform classification scheme, and 3) providing a large-scale ship database with geographic information (covering more than 3000 ports and 33 routes) that benefits multi-modal analysis. Additionally, we discuss the evaluation protocols corresponding to image characteristics in GLSD and analyze the performance of selected state-of-the-art object detection algorithms on GLSD, aiming to establish baselines for future studies.

Proximate, structural, textural, sensory and microbiological properties of non-gluten extrudate using Sorghum (Sorghum bicolor L. Moench) and a sprouted legume (Phaseolus lunatus L.).

The inclusion of legumes as functional ingredients in a gluten-free extrusion process has been gaining attention in recent times. In this study, sorghum and germinated lima bean flour (100, 90:10, 80:20, 70:30, 60:40 and 50:50) was extruded (feed moisture - 18%, screw speed - 250 rpm, barrel temperatures 50 °C-120 °C-120 °C, die hole diameter - 3 mm) and analysed for functional, proximate, textural, structural, pasting, microbiological and sensory properties. With 100% sorghum used as control, lima beans addition significantly (p < 0.05) improved the loose (0.37-0.44 g/ml) and packed (0.63-0.72 g/ml) bulk density, while water (5.00-3.15 g/g) and oil (2.45-1.60 g/g) absorption capacity and expansion ratio (3.11-2.30) decreased, respectively. An increase in protein (12.77-18.00%), crude fibre (2.58-5.17%) and ash content (2.11-3.12%) were observed in the extrudate, while the (L*) colour parameter (54.49-43.62), hardness (180.04-78.36 N) and pasting viscosities reduced with addition of lima beans. The structural micrograph depicted air-trapped bubbles with thick walls after adding lima beans, while a notable decline in microbial count below approved limits was observed after 8 weeks of storage. Sensory scores showed that values obtained were above average with the 90:10 sorghum-lima bean ratio having the highest score. The economic and industrial value of underutilised legumes such as lima bean can be promoted as functional ingredients via extrusion in addressing coeliac disease and alternative sources of protein, especially in developing countries.

Evaluating the oxidative stability of triacylglycerols in rapeseed (Brassica napus) oleosomes

AbstractUnsaturated triacylglycerols (TAGs) are stored in natural droplets called oleosomes in seeds. The storage in oleosomes was suggested to increase TAGs' oxidative stability. In this study, we tested the oxidative stability of TAGs in rapeseed oleosomes and compared it with the one of TAGs stored as bulk oils or incorporated into oil‐in‐water emulsions stabilized by rapeseed lecithin. Oleosome oil‐in‐water emulsions (Фoil = 0.1) were created and stored along with the bulk oils and lecithin emulsions for 63 days at 40°C. The TAGs in oleosomes were more oxidatively stable than in the bulk oils and lecithin emulsions, as indicated by the 17‐day longer lag phase and a 1.6–1.8 times slower maximal hydroperoxide formation compared to the bulk oils and lecithin emulsions. Moreover, we made the first steps towards understanding the high stability of TAGs in oleosomes by monitoring the consumption of oleosome‐associated antioxidants (tocopherols and carotenoids). Using oleosome extracts could be a strategy to retard TAGs oxidation in oil‐in‐water emulsions.

The Synergic Effect of Brine Salinity and Dispersed Clay Particles on Water-in-Heavy Oil Emulsion: Insight into Asphaltene Structure and Emulsion Stability

Summary The research on enhancing oil recovery in sandstone reservoirs through low-salinity waterflooding (LSWF) has been well-documented, while there have been few studies conducted on the impact of emulsion formation in heavy oil due to the incompatibility between the injected brine, clay particles, and heavy oil components. In this study, we explored the synergic role of asphaltene and clay in the process of LSWF by introducing an innovative and thorough experimental approach. Our findings presented new insights into how LSWF in clay-rich sandstone reservoirs can influence the behavior and properties of the water-in-heavy oil emulsions. In this regard, we contacted the heavy oil and brine (with and without clay) for 20 days at 90°C. Then, the emulsion was centrifuged to separate the oil and brine phases. The oil phase was examined by conducting the viscosity, interfacial tension (IFT), Fourier transform infrared spectroscopy (FTIR), and asphaltene onset point (AOP) precipitation experiments. Significant decreases in viscosity and asphaltene precipitation values were observed when crude oil was exposed to clay solutions, as indicated by viscosity and IP-143 results. Furthermore, the zeta potential of clay particles suspended in various brines was determined to assess the electrostatic aspects of rock-oil interactions. The analysis of the emulsion phase indicated that the emulsion stability in the presence of clay increased because of the improvement of asphaltene contribution in the interface. This trend aligns with the zeta potential measurement results. In addition, after examining the pH and conductivity of aged brine in the presence and absence of clay, it was observed that the clay caused the release of hydrogen ions in the brine and then bonded with the dissolved cations, leading to improvement in the emulsion stability. Ultimately, the asphaltene molecular structure was compared via scanning electron microscopy (SEM) and attenuated total reflection analysis before contact with the brine and after separation from the emulsion phase. The results indicated a decrease in the concentration of aliphatic groups in the molecular structure of the remaining asphaltene following the aging of the oil bulk. These new findings can potentially mitigate unwanted emulsion damage in the LSWF in heavy oil recovery.

A machine learning-guided modeling approach to the kinetics of α-tocopherol and myricetin synergism in bulk oil oxidation

The shelf-life and quality of food products depend heavily on antioxidants, which protect lipids from free radical degradation. α-Tocopherol and myricetin, two potent antioxidants, synergistically enhance the prevention of oxidative rancidity in bulk oil systems. Understanding their degradation kinetics is essential for deepening our knowledge of their mechanisms and developing strategies to predict shelf-life before expiration. This paper introduces a generalized mathematical model to describe the degradation kinetics of α-tocopherol in the presence of myricetin. Using direct differential methods guided by a machine learning approach based on neural differential equations, we uncover two distinct phases of α-tocopherol degradation when coexisting with myricetin at varying concentration ratios. These findings inform the development of a mixed Weibull model that accurately captures the degradation process. Our study enhances the understanding of antioxidant interactions and provides a reliable method for predicting food system stability, offering valuable insights for optimizing natural antioxidants in food preservation.

The change rule of lipid oxidation and hydrolysis driven via water in Antarctic krill oil: Based on association colloid formation

The residual water and amphiphilic compounds such as phospholipids in bulk oil can form reverse micelles, which affect oxidative stability. In this study, the Antarctic krill oil (AKO) samples with different water contents were subjected to accelerated storage. During storage, AKO exhibited oxidative changes, manifested as increased POV, TBARS values, and volatile compound levels but decreased PUFA percentages. Meanwhile, AKO underwent hydrolysis, evidenced by decreased PC, PE, and TG contents but increased FFA contents. Moreover, the degree of lipid oxidation and hydrolysis is dose-dependent with water added. Cryogenic scanning electron microscopy imaging and micelle size distribution measurement proved the presence of reverse micelle, and their size and interfacial area improved with increased water contents. Correlation analysis suggested that lipid oxidation and hydrolysis positively correlated with the size and interfacial area of reverse micelle. Therefore, it is speculated that the oil-water interface may be the site of lipid oxidation and hydrolysis.

Updating the residual strength – damage index diagrams for hull girder collapse predictions of grounded ships

ABSTRACT A decade ago, the authors introduced the concept of residual strength-damage index diagrams to facilitate rapid predictions of buckling collapse in damaged structures. They demonstrated this approach with an example focused on predicting the collapse of hull girders. [Paik JK, Kim DK, Park DH, Kim HB, Kim MS. 2012b. A New Method for Assessing the Safety of Ships Damaged by Grounding. Int J Marit Eng. 154:A1–A20.]. This paper is a sequel to the 2012 paper by updating the grounding damage data used for the diagrams with more ships in types and sizes, where a total of 12 ships for three different types with four sizes per type are considered: oil tankers (Panamax, Aframax, Suezmax and VLCC), bulk carriers (Handysize, Supramax, Kamsarmax, Capesize), and container ships (3,500TEU, 5,000TEU, 7,500TEU and 13,000TEU). Literature reviews are also made to gain insights on the hull girder collapse of grounded ships, which can be implemented into the updated diagrams. It is confirmed that the proposed methodology can be useful in predicting the hull girder collapse of grounded ships at an earlier stage so that the best timely rescue schemes can be developed to prevent unwanted consequences after grounding, such as casualties, sinking and marine pollution.

Proximate Composition and Functional Properties of Soyabeans (Glycine Max) Enriched Carbohydrate Diets

This study explored enhancing the nutritional value and functional properties of carbohydrate-rich diets by incorporating soybeans into millet, cassava, and yam. Soybeans, known for their high protein, unsaturated fats, and micronutrients, were used to fortify these staple foods. Proximate analysis assessed the macronutrient content of both the original and soybean-enriched samples, while functional properties such as water and oil absorption capacities, swelling index, bulk density, and gelation capacity were evaluated. Results showed significant increases in protein content, particularly in the millet-soybean mixture (29.81%), with relatively low levels of fat and ash. Functional assessments indicated millet’s highest gelation capacity and cassava’s superior water absorption. These findings suggest that soybean fortification can improve carbohydrate-rich diets’ nutritional quality and versatility. Further research is recommended to assess the impact of these dietary modifications on human health and consumer acceptance.

Physicochemical Properties Of Native And Acetylated Pigeon Pea Starches

Starch was extracted from pigeon pea, an underutilized legume, and acetylated (2.43%) using acetic anhydride. The starch yield increased from 28.24% (native) to 83.63% (acetylated). The pH was 6.8 and 6.9, respectively. Apparent amylose content decreased after acetylation (25.95% to 19.67%). Moisture, ash, fat, crude protein, and carbohydrate contents showed minimal variation between native and acetylated starches. Bulk density, water absorption, and oil absorption capacities increased with acetylation. Acetylated starch had higher dispersibility (98.50%) than native starch (87.50%), but a higher least gelation concentration (16% vs. 6%). Viscosity decreased with acetylation, while solubility index and swelling power increased. Acetylation improved pasting properties, particularly setback and breakdown. These findings suggest acetylation enhances the functional properties of pigeon pea starch for potential industrial applications.

Evaluation of antioxidant potential of anthocyanin-rich hydro ethanol extract of Syzygium cumini fruit pulp in various in vitro models and in food supplement enriched with omega-3 fatty acids

Omega-3 fatty acids have immense health benefits but are highly susceptible to oxidation due to high degree of unsaturation in their molecular structure. Therefore, development of omega-3 fatty acids fortified stable functional food is a challenging task. The aim of the study was to evaluate antioxidant potential of anthocyanin-rich hydro ethanol extract of Syzygium cumini fruit pulp extract in various in vitro models and in omega-3 fatty acids enriched food supplement in bulk oil and oil-in-water emulsions model systems along with chemical analysis of the fruit pulp extract and evaluation of its cytotoxic potential, if any. The in vitro antioxidant potential was evaluated by DPPH radical scavenging, ABTS°+ decolorization and Fe2+ ion chelating methods. Antioxidant activity against oxidation of omega-3 fatty acids enriched food supplement in bulk oil and oil-in-water emulsions model systems was evaluated by monitoring primary oxidation, secondary oxidation and total oxidation of the omega-3 enriched oil using AOCS guidelines and iodometric method. Chemical analysis was performed by HR-LCMS analysis technique. Cytotoxic potential was evaluated by Allium cepa test. The test extract exhibited varying degrees of antioxidant activity in various in vitro models as well as against oxidation of omega-3 fatty acids enriched food supplement both in bulk oil and oil-in-water emulsions model systems. Chemical analysis revealed the presence of three major tentatively identified compounds malvidin-3,5-diglucoside, delphinidin-3,5-diglucoside and peonidin-3,5-diglucoside as major components of the extract. Test extract did not show any cytotoxic potential at recommended dosage level with LC50&gt; 1000 µg/ml. The results provide evidence that anthocyanin-rich hydro ethanol extract of Syzygium cumini fruit pulp may serve as a potential source of safe and effective, novel natural antioxidant for retarding oxidation of omega-3 fatty acids enriched food supplement which subsequently may help to develop omega-3 fortified stable functional foods in food industry.

Effect of combinations of 3,4‐dihydroxyphenylacetic acid and its esters on the oxidative stability of fish oil–containing trace water

AbstractThe current study aims to comprehend the effect of the various combinations of 3,4‐dihydroxyphenylacetic acid (3,4‐DHPA) and its esters in varying molar ratios on retarding oxidation in bulk refined fish oil in the presence of 0.3% w/w water. All the esters and 3,4‐DHPA exhibited better performance than the synthetic antioxidant butylated hydroxytoluene. In the presence of trace water, the parent compound was found to have a synergistic effect with hexyl ester when used at a molar ratio of 2:1, respectively, exhibiting a higher percent reduction among all the esters and their combinations. The study also showed that the presence of extraneous water can significantly accelerate the oxidation (twofold) in a bulk fish oil system. This suggests that the microenvironment of the oil is altered when water is present and that association colloids play a key role in enhancing the rate of oxidation. Thus, while designing a competent mixture of antioxidants, the specific site of oxidation involved and the surface‐active components should be taken into consideration to efficiently retard oxidation.Practical Applications: Analyzing the impact of trace amounts of water on the efficiency of natural antioxidants, including 3,4‐DHPA and its lipophilic esters, helps to comprehend the required optimal antioxidant concentrations for such a dynamic bulk oil system. The study finds application in controlling oxidation in PUFA‐rich oils containing surface‐active minor components that can accelerate oxidation. The results of the study show that 3,4‐DHPA and its esters could be a potential replacement for the synthetic antioxidant BHT in all aspects.

Qualitative Assessment of Flours from Five Varieties of Yam in Benue State Nigeria

Need to reduce post-harvest losses of Benue yams birthed this research. The study investigated the functional, pasting properties and nutritional composition of high quality flours produced from five Yam varieties in Benue State, Nigeria. The functional and pasting properties and nutritional composition of flours produced from five yam varieties in Benue State, Nigeria. Their bulk density (0.70-0.84 g/cm3), dispersibility (23.17-39.33g/mL), water (0.87-2.53mL/g) and oil (0.93-2.03mL/g) absorption capacities, swelling index (0.92-2.07mL/g) and capacity ranged from 146.30-265.82%., The peak viscosity, trough, breakdown, final viscosity, set back, peak time and pasting temperature, ranged from 1285.00-4586.33 RVU, 1102.00-4035.00 RVU, 57.07-1046.00 RVU, 1878.33-6428.00 RVU, 688.00-2393.33 RVU - (Rapid Viscometric Unit), 5.40-7.20mins and 81.50-88.85oC., The moisture content, ash, crude fiber, protein, fat, carbohydrates and energy values ranged from 7.61-9.70%, 0.05-3.80%, 0.10-4.82%, 7.77-9.27%, 1.19-1.51 %; 75.09-79.55% and 326.50-343.52 kcal., The Vitamins: A (0.66.41-807.55 mg/100 g), C (23.40-28.73mg/100 g), E (0.08-1.24 mg/100 g), K (0.12-0.74 mg/100 g) and B1 ranged from 0.73-0.83 mg/100 g) while vitamin D was negligible in all samples., The Minerals sodium, potassium, Calcium, magnesium, phosphorus, manganese and zinc ranged from 47.42-59.73 mg/100 g, 69.01-123.51 mg/100 g, 25.28-33.01 mg/100 g, 39.18-58.02 mg/100 g, 0.04-0.12 mg/100 g, 2.95-5.43 mg/100 g and 0.79-1.25 mg/100 g respectively. Results revealed that, Sample AR (Amura yam flour) could be regarded to have the best quality of all parameters evaluated compared to all the other yam flours. Though generally, the physico-chemical properties of the yam flours compared favourably with the wheat flour used as control, therefore, they all exhibited good qualities of flours for baking of confectioneries.

Development of corn starch-sodium alginate emulsion gels as animal fat substitute: Effect of oil concentration

Emulsion gels were prepared utilizing corn starch (CS), sodium alginate (SA), and corn oil through calcium ion induction for animal-fat analogs. The influence of oil concentration on the rheological properties, microstructure and lipid oxidation of the emulsion gel was analyzed. Results revealed that the emulsion gel containing 30% (v/v) oil exhibited no surplus oil leakage and demonstrated the highest gel strength. The results of the small amplitude oscillatory shear (SAOS) and large amplitude oscillatory shear (LAOS) test proved that the emulsion gel exhibited the greatest elasticity and deformation resistance when the oil content was 30% (v/v), imparting suitable mouth feel and transport stability as an animal fat substitute. Microstructure analysis indicated that SA crosslinked with Ca2+ to generate a network structure accompanied by the reinforcing effect of starch granules, enabling the dense network to capture an optimal quantity of oil to form a uniform gel network structure. Furthermore, the emulsion gel exhibited markedly lower lipid oxidation compared to bulk oil after 14 days of storage. As a new fat analog system, the CS-SA emulsion gel holds promising potential for applications in the food industry.

Aggregation in Deep Eutectic Solvents (DESs): Formation of Polar DES-in-Nonpolar DES Microemulsions.

The versatility of environmentally benign and inexpensive deep eutectic solvents (DESs) lies in their widely varying physicochemical properties. Depending on its constituents, a DES may be highly polar or nonpolar in nature. This offers an enticing possibility of formation of novel nonaqueous microemulsions (MEs). Evidence of the presence of polar DES-in-nonpolar DES MEs is presented with reline (formed by mixing choline chloride and urea in 1 : 2 mol ratio) as the polar DES forming the ME pools, Thy : DA [formed by mixing thymol (Thy) and n-decanoic acid (DA) in 1 : 1 mol ratio] nonpolar DES as the bulk oil phase and nonionic surfactant Brij-35 as the emulsifying agent. While only sparingly miscible in Thy : DA, as high as 2.5 M reline can be solubilized in this DES in the presence of 100 mM Brij-35; reline loading (w Rel = [reline]/[Brij-35]) as high as 25 can be achieved. The ternary phase diagram of the Thy : DA/Brij-35/reline system reveals a clear and transparent single-phase region where MEs may be forming. Dynamic light scattering confirms the presence of MEs of 2-10 nm size. Even as up to 2.5 M (ca. 0.35 mole fraction) reline, whose dynamic viscosity (η) and electrical conductivity (κ) are very high, is added to 100 mM Brij-35 solution of Thy : DA, the η and κ values of the solution increase insignificantly, thus conforming to the formation of MEs in the solution. Fourier transform infrared (FTIR) absorbance spectra and fluorescence probe responses further indicate that reline is not dispersed in the medium but rather forms polar pools of the MEs. These novel nonaqueous polar DES-in-nonpolar DES MEs will not only expand the application potential of DESs but also offer a new class of organized media with widespread potential.

Molecular dynamics simulation of wax micro-structure characteristics in the oil-water emulsion

As a key issue in the flow assurance of wax-containing crude oils, the microscopic mechanism of wax deposition in multiphase pipelines is still unclear. Based on macroscopic experimental data, two forms of crystallized wax have been found under an oil-water emulsion, including adsorbed wax on the interface of water droplets and suspended wax in the bulk oil phase, which are the important factors influencing wax deposition. However, the micro-formation mechanism of the adsorbed & suspended wax is not elucidated. In this work, molecular dynamics simulations are used to investigate the micro-structure characteristics of the adsorbed & suspended wax in the oil-water emulsion containing surfactant Span60. A method is proposed to quantitatively calculate the distributions of the adsorbed & suspended wax and the percentage of wax adsorption area at the oil-water interface. The results indicate that surfactant with the hydrophilic end will insert into the water phase and the trailing hydrophobic end stretching will point to the oil phase during co-crystallizing with wax molecules. Meanwhile, the interface tension is further reduced by tilting the adsorbed wax tail chain to enhance the adsorption stability. Based on the complicated influence of surfactants on wax adsorption, the quantitative distribution characteristics of the adsorbed & suspended wax in the oil-water emulsion are complex under different wax carbon numbers and surfactant/wax contents. This microscopic investigation of wax distribution in oil-water emulsion can support the establishment of better strategies for solving the wax deposition problem in multiphase flow.

Development of Micronutrient Enriched Composite Flour with Selected Grains, Pulses, and Herbs

Most of the non-communicable diseases are directly related to the consumption of purified wheat flour. Therefore, composite flour mixtures can be introduced as a remedy. This study aimed to formulate a composite flour mixture comprising rice (Oryza sativa, variety Bg352), cowpea (Vigna unguiculata), horse gram (Macrotyloma uniflorum), black cumin (Nigella sativa), and ash plantain (Musa paradisiaca) pseudo stem. All the raw materials were cleaned and transformed into flour forms, and eight different composite flour mixtures were prepared according to Taguchi’s L8 orthogonal design. Eight samples of String hoppers, hoppers and pittu were prepared with eight different formulations. The sensory properties of prepared samples were evaluated using the five-point hedonic scale with thirty semi-trained panelists. The proximate composition, mineral profile, total phenolic content and antioxidant activity of the selected formulae were determined using standard analytical techniques. The colour, swelling index, initial water absorption capacity and bulk density of the final formulae were also evaluated. The highest rank for all the tested sensory attributes was obtained by the formula consisting of 82.93% O. sativa, 10.73% V. unguiculata, 3.90% M. paradisiaca pseudo stem, 1.95% M. uniflorum, and 4.88% N. sativa flour. The proximate results revealed that the sample with highest overall acceptability contains moisture (9.83%), ash (1.25%), total fat (1.28%), crude protein (10.55%), crude fiber (2.40%) and carbohydrate (70.25%). The results of the mineral profile of the sample with the highest overall acceptability for all sensory attributes revealed that sodium (1879.85 ppm), potassium (1276.20 ppm), calcium (2911.67 ppm), magnesium (8923.68 ppm), zinc (2.57 ppm), manganese(0.32 ppm), and iron (2.19 ppm). DPPH radical scavenging activity (0.0688 mg mL-1) and gallic acid equivalent phenolic content (37.02 μg/mL) of the composite flour mixture were analyzed. The initial water absorption capacity (150.83), oil absorption capacity (1.99 g/g), swelling index (4.99 mL/g), bulk density (0.50 g/ mL), and color (L*87.03, a*0.8, b*7.9, h 84.27) were recorded. The total plate count, yeast &amp; mold count, coliform count, peroxide value and moisture content confirmed the product's safe consumption for two months. The developed composite flour mixture meets micronutrient requirements, and it can be used as a substitute for purified wheat flour for making string hoppers, hoppers, roti and pittu.

Oil, well, development, shelf, bulk island, efficiency, gravitation

Traditional technologies of oil production on the land and the sea shelf have low coefficient of oil recovery, thus cause a huge loss to environment to what become frequent oil spills testify worldwide. In article the innovative way of development of oil fields allowing to increase significantly oil recovery by means of artificially created gravitational mode is described and also completely to exclude environmental pollution when developing offshore fields thanks to oil production by a dense grid of wells which are drilled from horizontal wells. In comparison with usual ways of oil production on the shelf, such as development, from bulk islands, oil platforms and platforms, this way has a number of technological and economic advantages. Experience of application of similar technologies around the world is considered. For comparison outputs of wells and capital expenditure on the example of oil fields Kyrykmyltyk and Kashagan in Kazakhstan are counted.

Revisiting polar paradox: antioxidant activity in bulk oil using selected phenol lipids.

The purpose of this work was to re-evaluate the polar paradox theory (PPT) that explains the relationships between the efficacy of antioxidants, their polarity, and their environments. In this study, ascorbic acid (AA), ascorbyl palmitate (AP), gallic acid (GA), gallyl palmitate (GP), Trolox (TR), α-tocopherol (TO), resveratrol (R), and resveratryl palmitate (RP) were employed to assess conjugated dienoic acid (CDA), the p-anisidine value (p-AV), headspace oxygen content, and hexanal formation in a bulk oil system. TR, TO, R, and RP showed better antioxidant activities in CDA and p-AV and higher headspace oxygen content than AA, AP, GA, and GP. AA showed lower hexanal formation than AP, whereas GP, TO, and RP had better antioxidant activity than their derivatives. These findings suggest that the PPT might be useful to explain the oxidation that occurs at the air-oil interface/association colloids but applying it to other assays might not appropriate.

New molecular and macroscopic understandings of novel green chemicals based on Xanthan Gum and bio-surfactants for enhanced oil recovery

This research investigates the interactions between a novel environmentally friendly chemical fluid consisting of Xanthan gum and bio-based surfactants, and crude oil. The surfactants, derived from various leaves using the spray drying technique, were characterized using Fourier-transform infrared (FTIR) spectroscopy, zeta potential analysis, Dynamic light scattering, and evaluation of critical micelle concentration. Static emulsion tests were conducted to explore the emulsification between crude oil and the polymer-surfactant solution. Analysis of the bulk oil FTIR spectra revealed that saturated hydrocarbons and light aromatic hydrocarbons exhibited a higher tendency to adsorb onto the emulsion phase. Furthermore, the increased presence of polar hydrocarbons in emulsion phases generated by polar surfactants confirmed the activation of electrostatic forces in fluid–fluid interactions. Nuclear magnetic resonance spectroscopy showed that the xanthan solution without surfactants had a greater potential to adsorb asphaltenes with highly fused aromatic rings, while the presence of bio-based surfactants reduced the solution's ability to adsorb asphaltenes with larger cores. Microfluidic tests demonstrated that incorporating surfactants derived from Morus nigra and Aloevera leaves into the xanthan solution enhanced oil recovery. While injection of the xanthan solution resulted in a 49.8% recovery rate, the addition of Morus nigra and Aloevera leaf-derived surfactants to the xanthan solution increased oil recovery to 58.1% and 55.8%, respectively.

Application of Microwaves in the Production Process of Biodiesel from Bulk Oil

Abstract Using bulk oil as biodiesel fuel is a waste reduction opportunity that creates economic value and creates alternative fuels to replace diesel fuel. The research was conducted through the transesterification reaction of bulk oil and methanol in batches using microwave heating to speed up the reaction time. The research is expected to show the right performance and response time to achieve optimal biodiesel yield and biodiesel properties, according to the Indonesian Nasional Standard (SNI). The experiment used two power levels (100 and 400 watts) and three reaction times (5, 10 and 15 minutes). Based on the analysis of variance and extended Duncan’s test, microwave power and response time were found to have a significant &lt;0.05 impact on product yield. The highest yield was 93.3%, achieved with a variation of 100 watts and a process time of 10 minutes. The results showed that, except for total glycerol, all quality criteria (density, acid number, saponification rate, methyl ester content, and iodine) met the SNI 7182:2015 standard [17]. It can be concluded that the use of microwaves has the potential to shorten the reaction time of biodiesel production while at the same time achieving high yield and good biodiesel quality.