Loading...
Search for:
natural-surface
0.005 seconds
Mechanistic study on the dynamic interfacial tension of crude oil + water systems: Experimental and modeling approaches
, Article Journal of Industrial and Engineering Chemistry ; Volume 35 , 2016 , Pages 408-416 ; 1226086X (ISSN) ; Ayatollahi, S ; Riazi, M ; Sharif University of Technology
Korean Society of Industrial Engineering Chemistry
Abstract
This study investigates dynamic interfacial tension (DIFT) of acidic crude oil (ACO) and non acidic/basic crude oils (BCO) + deionized water (DW) as a function of pressure from 500 to 4000 psi, and temperature from 30 to 80 °C using an axisymmetric drop shape analysis (ADSA) technique. DIFTs are also modeled using dynamic adsorption model, mono-exponential decay model, and empirical equations. The results showed that if a reduction in the surface excess concentration due to increasing temperature overlooks the total entropy of the molecules in the system, an increase in IFT would be expected
Effect of salts and their interaction with ingenious surfactants on the interfacial tension of crude oil/ionic solution
, Article Chinese Journal of Chemical Engineering ; Volume 28, Issue 1 , January , 2020 , Pages 224-235 ; Parvizi, R ; Ayatollahi, S ; Ghaseminejad Raeeni, E ; Sharif University of Technology
Chemical Industry Press
2020
Abstract
Understanding the roles of asphaltene and resin as natural surfactants existed in crude oil can enlighten contradicting reported results regarding interfacial tension (IFT) of crude oil/aqueous solution as a function of salinity and ion type. In this way, this study is aimed to investigate the effect of these natural surface active agents on IFT of with special focus on SO42− anion and Mg2+ cation. Two different synthetic oil solutions of 8 wt% of the extracted asphaltene and resin dissolved in toluene are prepared, and then IFT values are measured. After that, the obtained results are compared with the IFT of intact crude oil in contact with the same saline solutions examined in the...