Interfacial Properties Of Hydrocarbons

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Role of Aqueous Phase Chemistry, Interfacial Film Properties

Role of Aqueous Phase Chemistry, Interfacial Film Properties, and Surface Coverage in Stabilizing Water-In-Bitumen Emulsions Rocha Arrieta, Jair Andres Rocha Arrieta, J. A. (2016). Role of Aqueous Phase Chemistry, Interfacial Film Properties, and Surface Coverage in Stabilizing Water-In-Bitumen Emulsions (Unpublished master's thesis).

PHYSICO-CHEMICAL PROPERTIES OF SURFACTANT-WATER-OIL MIXTURES

PHYSICO-CHEMICAL PROPERTIES OF SURFACTANT-WATER-OIL MIXTURES: PHASE BEHAVIOR, MICROEMULSION FORMATION AND INTERFACIAL TENSION by JEAN LOUIS SALAGER, Ingénieur ENSIC, M.Sc. DISSERTATION Presented to the Faculty of the Graduate School of The University of Texas at Austin in Partial Fulfillment of the Requirements for the Degree of

Effect of salinity on the interfacial tension of model and

the interfacial tension of crude oil. To complete this study, the following data has been measured using a drop shape analyzer at ambient conditions: IFT of pure hydrocarbons, mixtures of pure hydrocarbons, three crude oils of varying density, and a bitumen versus aqueous phases of different salinity. The

The Impact of Biosurfactants on Microbial Cell Properties

with aqueous phase in aqueous solution [25,26]. These bioactive compounds reduce interfacial tension between immiscible liquids and increase the solubility of hydrocarbons [27]. As a result, the interfacial mass exchange in the surface multiplies, which translates into an increase in the permeation of organic

Measurement of interfacial tension in hydrocarbon/water

Figure 10: Plot of interfacial tension function versus water volume for Murban crude oil and Corexit® 9527 dispersant 19 Figure 11: Effect of water salinity and temperature on the interfacial tension of Alberta crude oil-

Hydrocarbon Behavior at Nanoscale Interfaces

The properties of neutrons make them an ideal probe for comparing the properties of bulk hydrocarbons with those filling confined geometries (Pynn 2009). Neutrons can be scattered either coherently or incoherently, thus providing opportunity for various kinds of analysis of both structural and dynamic properties of confined liquids.

Molecular Order Affects Interfacial Water Structure and

interfacial chemical properties, such as the amount of nonpolar solvent-exposed surface area. However, recent experiments have demonstrated that the hydrophobic interactions between uniformly nonpolar self-assembled monolayers (SAMs) also depend on molecular-level SAM order. In this work, we use atomistic

Review of the North Slope Oil Properties Relevant to

Sep 16, 2010 1.3.1 Oil Properties The properties of oil discussed here are viscosity, density, specific gravity, solubility, flash point, pour point, distillation fractions, interfacial tension, and vapour pressure. Viscosity is the resistance to flow in a liquid (Fingas, 2000). The lower the viscosity, the more readily the liquid flows.

THE INTERFACIAL BEHAVIOUR OF SORBITAN SURFACTANT MONOLAYERS

The properties of interfaces can be altered in several ways by surface-active substances. In order to get a maximum benefit out of the use of surfactants in technological processes a good knowledge of their interfacial behaviour is demanded. The measurements of surface pressure or interfacial tension are both important means

Response Ground Water Issue - EPA

Interfacial Tension When two liquids, which are immiscible, are in contact, an interfacial energy exists between the fluids, resulting in a physical interface. Interfacial tension is the surface energy at the interface that results from differences in the forces of molecular attraction within the fluids and at the interface (Bear, 1972).

Thermophysical Properties and Phase Behaviour of Fluids for

behaviour, interfacial properties and single-phase properties of systems containing carbon dioxide, water, salts, hydrocarbons and diluent gases. An overview of the outputs from this research will be presented. Examples include experimental measurements of the solubility of CO 2 in water and brines or various compositions,

Interfacial Behaviors of Isobutane Alkylation with 2-butene

liquid/liquid interfacial reaction.4 However, there is still little information about the interfacial properties between the reactant hydrocarbons and the binary catalyst mixtures, especially the effect of the concentration of SFIL. So, in this work, the molecular dynamics simulation was used to probe the interfacial behaviors involving the

Mesoscale Modeling of Interfacial Behaviors between

sulfuric acid. Actually, the BILs act as a surfactant which can improve the acid/hydrocarbon interfacial properties and further enhance the catalytic activities of sulfuric acid, because C4 alkylation catalyzed by sulfuric acid is a typical liquid/liquid interfacial reaction. However, it is difficult to detect the interfacial

Molecular insights on the interfacial and transport

2 on the interfacial and transport properties of brine/crude oil. Studying the interfacial properties of two immiscible fluids experi-mentally are still challenging [11], especially under high pressures, due to the scale of the interface which is about few nanometers in width.Molecularsimulation provides an efficientalternative toexplore

'The Basics' Understanding the Behavior of Light Non-Aqueous

aquifer properties⎯like porosity, saturation, and capillary pressure⎯affect LNAPL distribution. As you progress through the course, you will learn how fluid properties⎯like viscosity, density, and interfacial and surface tension⎯affect LNAPL distribution and recovery. LNAPL distribution and its saturation determine

CHAPTER III BEHAVIOR OF HYDROCARBONS IN THE SUBSURFACE

primarily by the properties of the liquid and the characteristics of the geologic media into which the product has been released. Important liquid properties include density, viscosity and interfacial tension. Soil properties that influence the movement of petroleum hydrocarbons include porosity and permeability.

Mater. Res. Soc. Symp. Proc. Vol. 586, Symp. M: Interfacial

relatively mobile moisture and hydrocarbons into its tip, leaving behind the fiducial mark (Figure 3). This is identically analogous to India ink being sucked into a crack tip of bulk K IC specimens [10]. Initially, India ink was put into the crack to outline the stable crack growth region, but this

Production of Biosurfactants - EOLSS

interfacial energy and tension, and is responsible for the unique properties of surfactant molecules. Measurements of surface tension at oil-water and air-water interfaces are easily performed with a tensiometer. However, it is difficult to quantify the surface tension at a solid-water interface.

Physical organic probes of interfacial wettability reveal the

the interfacial properties of these materials. During the 1950s and 1960s, Zisman and co-workers conducted the first systematic investigations of the interfacial properties of fluorinated organic materials. 6 8 These studies explored the wettability of a series of homologous n-alkanes on monolayers generated from the

Experimental Investigation of the Effect of using

The use of nanoparticle material homogenously mixed with surfactants alters the properties of hydrocarbons sweeping from pore throats of the reservoir. This mechanism greatly affects interfacial tension, wettability through the contact angle and the capillary pressure of hydrocarbons. Any rise in the recovery can

Addressing the Interfacial Properties for CO Electroreduction

interfacial properties can be tuned and monitored through the applied potential limits. Another relevant aspect while assessing the surface structure−selectivity−activity relationships is the effect of the pH bulk solution on the cyclic voltammetry fingerprint of Cu(111). In Figure 2, we investigate the effect of the pH in the Figure 1.

Classical density functional theory for the prediction of the

associating mixtures of water + alkanols47, and mixtures of hydrocarbons and aromatics48. Numerous studies in which a SAFT-like description is used within a DGT formalism to describe the interfacial properties of °uid mixtures have now been made49{54. One of the most successful and rigourous approaches for the description of in-

Project Title: Simulation of interfacial properties of gas

interfacial energy data and experimental difficulties involved in obtaining the same, molecular simulations can be used to calculate interfacial properties. Such knowledge is vital for not only preventing hydrate formation in pipelines, but also for exploiting hydrates as alternate sources of hydrocarbons. Expected outcomes

INTERFACIAL PROPERTIES OF RESERVOIR FLUIDS AND ROCKS

INTERFACIAL PROPERTIES OF RESERVOIR FLUIDS AND ROCKS Xuesong Li December 2012 2.2.1 IFT of oil/hydrocarbons and CO 2 system 21 2.2.2 IFT of brine/water and

Effects of Salt and Surfactant on Interfacial Characteristics

Mar 20, 2019 employed to model the interfacial properties (e.g., interfacial density and interfacial tension) and structural properties such as the radius of gyration as a function of water/oil ratio, surfactant concentration, temperature, and salinity of oil/surfactant/water mixtures. Molecular dynamics (MD) simulations are carried

Energy & Fuels Journal

2 in changing the interfacial and transport properties of systems composed of water and pure hydrocarbons, namely, hexane, octane, benzene, and xylene. The simulations were performed at 100 bar and 350 K. It was observed that sc-CO 2 accumulates at the interface, which leads to a reduction in the interfacial tension (IFT) of water−oil systems.

A reactive potential for hydrocarbons with intermolecular

tional properties of solid carbon and small hydrocarbons.18 In various incarnations, this potential has been used to model many different materials and processes, including fullerenes,17 carbon nanotubes,19 amorphous carbon,20 and the tribology and tribochemistry of diamond interfaces.21 27 The REBO potential is not appropriate for studying ev-

A Molecular Model for Upstream Engineering Applications

fluid properties in the hydrocarbon, aqueous, and gaseous phases as well as the interfacial properties between these phases with a single unified model. The approach taken at Rice University is based on our SAFT equation of state. This model is widely applied in industry to describe the phase

Physicochemical Properties of Rhamnolipid Biosurfactant from

Interfacial properties rhamnolipids from an extract produced by a strain of Pseudomonas aerugi-nosa were analyzed in this study. The extract of rhamnolipid was characterized by surface tension in different conditions; interfacial tension with different hydrocarbons; critical micelle concentra-

Surfactants: Fundamentals and Applications in the Petroleum

behaviours, and their interfacial properties are demonstrated. It is shown how surfactants may be applied to alter interfacial properties, promote oil displacement, and stabilize or destabilize dispersions such as foams, emulsions, and suspensions. Under-standing and controlling the properties of surfactant-containing

INTERFACIAL, LLC. Safety Data Sheet 5001 90% Highly Filled

At high temperatures, this material may emit various oligomers, waxes and oxygenated hydrocarbons, carbon oxides, and other organic vapors. Inhalation of these decomposition products may be irritating and/or hazardous. 5.3 Special protective actions for fire-fighters In the event of fire, wear self-contained breathing apparatus for firefighting.

Interfacial Characteristics between Pure Hydrocarbon

Properties of interfacial tension (IFT) between pure-hydrocarbon and CO2 The examination has been taken to study IFT characteristics of paraffin hydrocarbons, naphthenic hydrocarbons and aromatic hydrocarbons in CO 2 environment at a laboratory temperature of 104˜ (Eissa

The Function of Emollients in Skin Care

Surface & interfacial properties of emulsion droplets versus the properties of the skin lipids Rheology of emulsion Determined by emollient properties and interaction with polymers and emulsifiers Solubility of emollient in stratum corneum and vice versa Polarity of respective phases Droplet-droplet interaction

Interfacial Tensions of Industrial Fluids from a Molecular

(e.g., phase equilibria) and inhomogeneous (interfacial proper-ties) behavior of fluids in a good agreement with experimental data. Additionally, SGT provides other interfacial properties such as density or concentration profiles along the interfacial zone, interface thickness, excess adsorption, surface enthalpy, and surface entropy, etc.

Synthesis and interfacial properties of sophorolipid derivatives

responding sodium alkoxides. Interfacial properties of these surfactants, such as surface tension reduction, aggregation, and adsorption, were systematically studied. It was found that the critical micelle concentration of sophorolipid esters decreases to about 1/2 per addi-tional one CH2 group to the alkyl ester moiety. Interestingly, these

DIFFICULT LIQUID-LIQUID SEPARATIONS

hydrocarbons when interfacial tension is low below 3 dynes/cm FIGURE 3. In a liquid-liquid coalescer, a prefilter first removes solids. Then, small droplets are combined into larger droplets, until the droplets coalesce into a bulk-flow fluid DIFFICULT LIQUID-

AAN025 V1 Interfacial rheometry - an introduction

Table 1: Surface and interfacial tension for different fluids Surface tension and Interfacial tension against water at 20° C Water 72.8 - mNm-1 Benzene 28.9 35.0 mNm-1 Acetone 23.7 mNm-1 CCl 4 26.8 45.1 mNm-1 n-Hexane 18.4 51.1 mNm-1 n-Octanol 27.5 8.5 mNm-1 Figure 3: Measurement of the interfacial tension using the

Molecular Dynamics Simulations of the Role of Salinity and

Interfacial tension of some hydrocarbon/water systems, including a mixture of aliphatic and aromatic hydrocarbons, has been estimated on the basis of molecular dynamics simulations. The dependence of the interfacial properties on the salinity of the aqueous phase and the temperature has been Different concentrations in NaCl and simulated CaCl. 2

SPECIFIC ION EFFECTS ON THE INTERFACIAL TENSION OF WATER

Colloids present high A/V (interfacial area/ volume) ratios. Because of this, surface properties such as surface tension and interfacial tension are extremely important for the characterization and study of these systems. The interfacial tension corresponds to the Gibbs free energy per unit of area at the interface between

Fault seal modelling the influence of fluid properties on

66 The interfacial tension (IFT) and the contact angle (CA) are the main fluid-67 specific properties controlling the capillary seal and the key parameters used in both 68 hydrocarbon and CO 2 studies. The wetting properties of various rock-forming 69 minerals are different for CO 2 and hydrocarbons, which has caused a concern that