نتایج جستجو برای: interfacial tension

تعداد نتایج: 79199  

Turbine oil plays an important role in supporting optimal steam turbine performance. Some additives in turbine oil can cause emulsification when the oil is contaminated by water, so demulsibility is a very important property of the steam turbine oil. In order to improve the demulsibility of steam turbine oil, two kinds of polyether-silicone comb copolymers are synthesized and used as steam turb...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2006
abbas shahrabadi bahram dabir maryam sadi

in this paper, a simplified formulation for compositional reservoir simulator is presented. these types of simulators are used when inter-phase mass transfer depends on phase composition as well as pressure. the procedure for solving compositional model equations is completely described. for equilibrium calculation, property estimation peng robinson equation of state is used. this equation was ...

Hossein Akhgari Mohammad Mehdi Montazer Rahmati Seyyed Jaber Safdari

Holdup was measured at various frequencies, amplitudes, continuous and dispersed phase flow rates for binary systems in a pulsed plate column capable of providing samples at various heights. The binary systems was so selected as to cover a wide spectrum of interfacial tensions. Dispersed phase holdup was found to increase with height in a logarithmic fashion at conditions away from the flooding...

The chemical surfactant flooding can mobilize the trapped oil by lowering the interfacial tension between oil and brine and in some cases altering the reservoir rock wettability. In this work, the effect of surfactants on oil/brine interfacial tension was experimentally investigated. First, the effect of surfactants concentration was surveyed. Afterwards, the effect of salinity on surfactant be...

In this research, Sauter-mean drop diameters and the flooding behavior have been investigated experimentally in a pilot scale Kühni extraction column. The experiments were carried out in the absence of mass transfer for two different standard chemical systems. In the experiments operating parameters including agitation speed, flow rate of both liquid phases and interfacial tension have been stu...

Journal: :iranian journal of oil and gas science and technology 0
mohammad saki 1ms. student, mapsa, special core analysis lab, tehran, iran ali reza khaz'al department of chemical engineering, isfahan university of technology, isfahan 8415683111, iran

the chemical surfactant flooding can mobilize the trapped oil by lowering the interfacial tension between oil and brine and in some cases altering the reservoir rock wettability. in this work, the effect of surfactants on oil/brine interfacial tension was experimentally investigated. first, the effect of surfactants concentration was surveyed. afterwards, the effect of salinity on surfactant be...

Journal: :international journal of advanced design and manufacturing technology 0
mohammad zaman kabir department of civil and environmental engineering, amirkabir university of technology ata hojjatkashani ph. d student , department of civil and environmental engineering, amirkabir university of technology

the aim of this research is to investigate the effect of carbon fiber reinforced polymer (cfrp) composite fabric on monotonic and fatigue behaviors of reinforced concrete beams. to control the failure occurrence, a small notch was induced at the middle span in bottom surface for all of the studied rc specimens. totally 12 beams were tested from which 6 beams tested under monotonic and 6 other t...

Journal: :The Journal of chemical physics 2012
Robert A Riggleman Rajeev Kumar Glenn H Fredrickson

Complex coacervation, a liquid-liquid phase separation that occurs when two oppositely charged polyelectrolytes are mixed in a solution, has the potential to be exploited for many emerging applications including wet adhesives and drug delivery vehicles. The ultra-low interfacial tension of coacervate systems against water is critical for such applications, and it would be advantageous if molecu...

2016
Jean Lachaise Alain Graciaa A. Martinez A. Rousset

2014 We describe a method for the measurement of interfacial tensions in the millidyne/cm range by measuring the diffuse part of the total internally reflected light produced when the interfaces are illuminated close to the critical angle. This method has been used to measure the optimal interfacial tension in toluene-brine microemulsions in simultaneous equilibrium with the oil and aqueous pha...

Journal: :journal of chemical and petroleum engineering 2011
hozhabr sohbat zadeh hosein abolghasemi mohammad ghannadi maragheh amir khacpai

in this paper, we studied effect of different parameters including density, viscosity, interfacial tension and solute transfer concentration on phase inversion hold-up. the results showed that change in phase density ratio had no effect on phase inversion hold-up. it also disclosed that the phase viscosity ratio was the most effective parameter affecting phase inversion hold-up and each phase h...

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