Chemical Engineering
An Experimental Investigation and Prediction of Asphaltene Deposition during Laminar Flow in the Pipes Using a Heat Transfer Approach

Farhad Salimi; Shahab Ayatollahi; Mohsen Vafaie Seftie

Volume 6, Issue 2 , April 2017, , Pages 17-32

https://doi.org/10.22050/ijogst.2017.47414

Abstract
  In this study, asphaltene deposition from crude oil has experimentally and theoretically been studied using a test loop and an accurate temperature monitoring during a laminar flow. The effects of oil velocity and surface temperature on the thickness of asphaltene deposition were investigated. The results ...  Read More

Chemical Engineering
An Evaluation of Four Electrolyte Models for the Prediction of Thermodynamic Properties of Aqueous Electrolyte Solutions

Kamalodin Momeni; Hesam Najibi Najibi; Mohammad T. Sadeghi

Volume 6, Issue 2 , April 2017, , Pages 46-60

https://doi.org/10.22050/ijogst.2017.47434

Abstract
  In this work, the performance of four electrolyte models for prediction the osmotic and activity coefficients of different aqueous salt solutions at 298 K, atmospheric pressure and in a wide range of concentrations are evaluated. In two of these models, (electrolyte Non-Random Two-Liquid e-NRTL and Mean ...  Read More