Chemical Engineering
Experimental Measurement of Equilibrium Surface Tension of an Aqueous Solution of Polyethylene Glycol and a Surfactant

Fateme Beiranvand; Seyed Hesam Najibi; Bahram Hashemi Shahraki

Volume 9, Issue 3 , July 2020, , Pages 26-43

  A device is designed and constructed for measuring the equilibrium surface tension of water and a number of other solutions. The measured equilibrium surface tension of water, as a reference fluid, has good consistency with literature data. Moreover, the equilibrium surface tension of the aqueous solutions ...  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

  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

A Feasibility Study of the Technologies for Deep Ethane Recovery from the Gases Produced in One of the Iran Southern Fields

Seyed Hesam Najibi; Hamid Darabi; Mohammad Javad Kamali

Volume 1, Issue 1 , November 2012, , Pages 13-24

  Recently, due to the very good market in ethane as a feedstock for petrochemical complexes, there are some plans to make a deep ethane recovery from the gases produced in Iran southern fields. In this work, the feasibility of different technologies for deep ethane recovery from a specified feed gas produced ...  Read More