scholarly journals Treating Wet Oil in Amara Oil Field Using Nanomaterial (SiO2) With Different Types of De emulsifiers

2021 ◽  
Vol 22 (1) ◽  
pp. 29-38
Author(s):  
Ayat Ragheb Alkarbalaee ◽  
Adel Sharif Hammadi ◽  
Ghassan Hamid Abdul Majeed
Keyword(s):  
Acidic Medium ◽  
Separation Efficiency ◽  
Sodium Dodecyl ◽  
Separation Process ◽  
Oil Field ◽  
Oil Refining ◽  
Ph Values ◽  
Different Types ◽  
Separation Results ◽  
High Separation

One of the most important problems in the oil production process and when its continuous flow, is emulsified oil (w/o emulsion), which in turn causes many problems, from the production line to the extended pipelines that are then transported to the oil refining process. It was observed that the nanomaterial (SiO2) supported the separation process by adding it to the emulsion sample and showed a high separation rate with the demulsifiers (RB6000) and (sebamax) where the percentage of separation was greater than (90 and 80 )%  respectively, and less than that when dealing with (Sodium dodecyl sulfate and Diethylene glycol), the percentage of separation was (60% and 50%) respectively.    The high proportion of (NaCl + distilled water) raises the probability of the separation efficiency as the separation was (88.5,79)% and (65.5, 55) %  for (RB6000, SebaMax)respectively with (SiO2) at 70 °C, while the results of separation were (77,85)% and (65,40)  for (RB6000, Seba Max) respectively with (SiO2) at 50 °C after 120 minutes, where the (w/o ratio) was (9:1) for the high separation results and (7:3) for the lower separation results, at a speed of (12000rpm), and with a salt concentration of (1500) ppm, and less of these results at lower volumetric and temporal conditions. The (NaCl) salt deals with the wall films separating the droplets and reduces their viscosity [1].    As for the pH factor, it is at the value (2 and 3) represent a stable emulsion that is difficult to separate easily, but with the passage of raising the pH away from the acidic medium and near to the basic direction, a significant increase in the separation process was observed compared with the acidic medium at lower values, after 120 minutes the separation seemed to be good efficient, reaching (60 and 70) % respectively, while at the same time the emulsion reached a more efficient separation level with a pH of (  8 and 7) equal to (80 and 87.3)  %, at 50 °C with SebaMax demulsifier in presence of (SiO2), and with the same pH values, an increase was observed in the separation with the increase in temperature to (70 °C), then it returns to be a reverse emulsifier when the value exceeds (10) to (11, 12, 13).

scholarly journals Asymmetrically Wettability Janus Cotton Fabrics Fabricated via Interfacial Ion Migration for Surfactant-stabilized Oil-in-water Emulsions

2021 ◽  
Author(s):  
Pu Yang ◽  
Ruimin Hu ◽  
Bin Yu ◽  
Yiwei Sun ◽  
Yiping Liu ◽  
...  
Keyword(s):  
Cotton Fabric ◽  
Separation Efficiency ◽  
Human Life ◽  
Sodium Dodecyl ◽  
Separation Performance ◽  
Step Method ◽  
Ion Migration ◽  
Oil In Water ◽  
Fabric Surface ◽  
High Separation

Abstract Separation of surfactant-stabilized oil-water emulsions seems to be challenging owing to its diverse repercussions on environment and human life. The asymmetrical wettability Janus cotton fabric (J-MH@CF) with high separation performance was prepared by two-step method, which related to interfacial ion migration technology and unilateral spraying treatment. In detail, the immobilization of magnesium hydroxide (Mg(OH)2) caused the formation of the rough micro/nanostructure of cotton fabric surface, which was helpful to superhydrophilic property. Stearic acid as a coating created the unilateral superhydrophobic surface with low surface energy. J-MH@CF showed asymmetric wettability, featuring diode-like directional water transmission. Wettability, directional transmission and separation performance of J-MH@CF membrane were investigated systematically. The asymmetric wettability architecture was demonstrated to play a key role in separating surfactant-stabilized oil-in-water emulsions. Impressingly, the separation performance was not affected by the type of surfactants. For emulsion stabilized by sodium dodecyl sulfate (SDS), the separation flux driven by gravity was approximately 500 L m-2h-1, and all separation efficiencies were over 99.3%. CTAB/Oil/H2O emulsion and the Tween-60/Oil/H2O emulsion also could be successfully separated with high separation efficiency and separation flux. During the whole separation process, the oil droplets surrounded by surfactants (Oil-Ss) were difficult to demulsify and gathered on the surface of the fabric to form a "creamy layer", which was beneficial to improve separation efficiency and could be cleaned off so that J-MH@CF membrane was not contaminated. In addition, the J-MH@CF membrane exhibited robust reusability for separation, which was promising for remediation of oily wastewater containing surfactants.

scholarly journals Recovery of γ-Fe2O3 from copper ore tailings by magnetization roasting and magnetic separation

2021 ◽  
Vol 19 (1) ◽  
pp. 128-137
Author(s):  
Bing Luo ◽  
Tongjiang Peng ◽  
Hongjuan Sun
Keyword(s):  
Magnetic Separation ◽  
Magnetic Field Intensity ◽  
Sodium Dodecyl ◽  
Separation Process ◽  
Sodium Dodecyl Sulfonate ◽  
Copper Ore ◽  
Yield Rate ◽  
Optimum Parameters ◽  
Roasting Temperature ◽  
Mineralogical Phase

Abstract To comprehensively reuse copper ore tailings, the recovery of γ-Fe2O3 from magnetic roasted slag after sulfur release from copper ore tailings followed by magnetic separation is performed. In this work, after analysis of chemical composition and mineralogical phase composition, the effects of parameters in both magnetization roasting and magnetic separation process with respect to roasting temperature, residence time, airflow, particle size distribution, magnetic field intensity, and the ratio of sodium dodecyl sulfonate to roasted slag were investigated. Under optimum parameters, a great number of γ-Fe2O3 is recycled with a grade of 66.86% and a yield rate of 67.21%. Meanwhile, the microstructure, phase transformation and magnetic property of copper ore tailings, roasted slag, and magnetic concentrate are carried out.

Downhole CO2 partial pressure calculation and tubing material selection – a case study of an offshore oil field in the South China Sea

2016 ◽  
Vol 63 (5) ◽  
pp. 414-420 ◽  
Author(s):  
Wei Yan ◽  
Yong Xiang ◽  
Wenliang Li ◽  
Jingen Deng
Keyword(s):  
Partial Pressure ◽  
Pressure Profile ◽  
Field Application ◽  
Separation Process ◽  
Oil Field ◽  
Oil Well ◽  
Content Type ◽  
Calculating Method ◽  
Oil Gas

Purpose This paper aims to establish the downhole CO2 partial pressure profile calculating method and then to make an economical oil country tubular goods (OCTG) anti-corrosion design. CO2 partial pressure is the most important parameter to the oil and gas corrosion research for these wells which contain sweet gas of CO2. However, till now, there has not been a recognized method for calculating this important value. Especially in oil well, CO2 partial pressure calculation seems more complicated. Based on Dolton partial pressure law and oil gas separation process, CO2 partial pressure profile calculating method in oil well is proposed. A case study was presented according to the new method, and two kinds of corrosion environment were determined. An experimental research was conducted on N80, 3Cr-L80 and 13Cr-L80 material. Based on the test results, 3Cr-L80 was recommended for downhole tubing. Combined with the field application practice, 3Cr-L80 was proved as a safety and economy anti-corrosion tubing material in this oil field. A proper corrosion parameter (mainly refers to CO2 partial pressure and temperature) can ensure a safety and economy downhole tubing anti-corrosion design. Design/methodology/approach Based on Dolton partial pressure law and oil gas separation process, CO2 partial pressure profile calculating method in oil well is proposed. An experimental research was conducted on N80, 3Cr-L80 and 13Cr-L80 material. A field application practice was used. Findings It is necessary to calculate the CO2 partial pressure properly to ensure a safety and economy downhole tubing (or casing) anti-corrosion design. Originality/value The gas and oil separation theory and corrosion theory are combined together to give a useful method in downhole tubing anti-corrosion design method.

scholarly journals The Limitations in Current Studies of Organic Fouling and Future Prospects

Membranes ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 922
Author(s):  
Xianghao Meng ◽  
Shujuan Meng ◽  
Yu Liu
Keyword(s):  
Membrane Fouling ◽  
Separation Efficiency ◽  
Deep Understanding ◽  
Support Vector ◽  
Feed Water ◽  
Source Water ◽  
Future Prospects ◽  
Surrogate Substances ◽  
High Separation ◽  
Selection Of

Microfiltration and ultrafiltration for water/wastewater treatment have gained global attention due to their high separation efficiency, while membrane fouling still remains one of their bottlenecks. In such a situation, many researchers attempt to obtain a deep understanding of fouling mechanisms and to develop effective fouling controls. Therefore, this article intends to trigger discussions on the appropriate choice of foulant surrogates and the application of mathematic models to analyze fouling mechanisms in these filtration processes. It has been found that the commonly used foulant surrogate (sodium alginate) cannot ideally represent the organic foulants in practical feed water to explore the fouling mechanisms. More surrogate foulants or extracellular polymeric substance (EPS) extracted from practical source water may be more suitable for use in the studies of membrane fouling problems. On the other hand, the support vector machine (SVM) which focuses on the general trends of filtration data may work as a more powerful simulation tool than traditional empirical models to predict complex filtration behaviors. Careful selection of foulant surrogate substances and the application of accurate mathematical modeling for fouling mechanisms would provide deep insights into the fouling problems.

Controllable Preparation of Silver Orthophosphate@Carbon Layer Core/Shell Heterostructure with Enhanced Visible Photocatalytic Properties and Stability

NANO ◽  
2015 ◽  
Vol 10 (02) ◽  
pp. 1550022 ◽  
Author(s):  
Yangcun Xie ◽  
Xiuwen Wang ◽  
Xu Wen
Keyword(s):  
High Stability ◽  
Separation Efficiency ◽  
Visible Region ◽  
Carbon Layer ◽  
Core Shell ◽  
Photogenerated Electrons ◽  
First Time ◽  
Fabrication Parameters ◽  
Controllable Preparation ◽  
High Separation

In this study, silver orthophosphate@carbon layer ( Ag 3 PO 4@ C ) core/shell heterostructure photocatalyst was prepared for the first time. The results showed that a uniform carbon layer was formed around the Ag 3 PO 4. By adjusting the hydrothermal fabrication parameters, the thickness of carbon layer could be easily controlled. Furthermore, the Ag 3 PO 4@ C had remarkable light absorption in the visible region. Photocatalytic tests displayed that the Ag 3 PO 4@ C heterostructures possessed a much higher degradation rate of phenol than pure Ag 3 PO 4 under visible light. The enhanced photocatalytic activity could be attributed to high separation efficiency of photogenerated electrons and holes based on the synergistic effect between carbon as a sensitizer and Ag 3 PO 4. Recycle tests showed that the Ag 3 PO 4@ C core/shell heterostructures maintained high stability over several cycles. The good stability could be attributed to the protection of insoluble carbon layer on the surfaces of Ag 3 PO 4 crystals in aqueous solution.

scholarly journals NMR Investigation of the Copper(II)-Ciprofloxacin System

1999 ◽  
Vol 6 (1) ◽  
pp. 1-4 ◽  
Author(s):  
Iztok Turel ◽  
Janez Košmrlj ◽  
Bjørn Andersen ◽  
Einar Sletten
Keyword(s):  
Acidic Medium ◽  
Acidic Solution ◽  
Relaxation Times ◽  
Ring System ◽  
Proton Relaxation ◽  
X Ray ◽  
Ph Values ◽  
Nmr Study ◽  
Terminal Nitrogen Atom ◽  
Titration Data

A proton NMR study was performed on the copper(ll)-ciprofloxacin system. The proton relaxation times (T1) were determined from the titration data in acidic and basic media. In acidic medium the H5 signal is dramatically affected and it is assumed that copper is bonded to the quinolone through carbonyl and one of the carboxyl oxygens. Such bonding is in agreement with the X-ray literature data for the complex [Cu(cf)2]Cl2.6H2O isolated from the slightly acidic solution. There are additional significant changes in T1 of H3′ and H5′ atoms which suggest that the terminal nitrogen atom of the piperazine ring system-N4′ also interacts with copper in the basic conditions. Thus it is plausible that more than one species are present in the solution at high pH values.

scholarly journals Electrochemical oxidation of As(iii) on Pd immobilized Pt surface: kinetics and sensing performance

RSC Advances ◽  
2018 ◽  
Vol 8 (15) ◽  
pp. 8071-8079 ◽  
Author(s):  
Md. Mahbubul Alam ◽  
Md. A. Rashed ◽  
Md. Musfiqur Rahman ◽  
Mohammed M. Rahman ◽  
Yuki Nagao ◽  
...  
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Surface Area ◽  
Electrochemical Oxidation ◽  
Acidic Medium ◽  
Oxidation Process ◽  
Sodium Dodecyl ◽  
Surface Kinetics ◽  
True Surface ◽  
Sds Surfactant ◽  
Sensing Performance

Amplification of true surface area can be improved when Pd particles are deposited on a substrate in the presence of sodium dodecyl sulfate (SDS) surfactant. In acidic medium, As(iii) undergoes a two-step oxidation process.

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