Cyrus Ghotbi
Department of Chemical & Petroleum Engineering, Sharif University of Technology, Tehran, I.R. IRAN
[ 1 ] - Correlation of Viscosity of Aqueous Solutions of Alkanolamine Mixtures Based on the Eyring's Theory and Wong-Sandler Mixing Rule
A viscosity model, based on Eyring’s absolute rate theory combined with a cubic PR equation of state and Wong-Sandler mixing rule, has been proposed in order to correlate viscosities of aqueous solutions of alkanolamine mixtures at atmospheric pressure and different temperatures. In the proposed method, the energy and size parameters in studied Equation of State (EoS) have been obtained usi...
[ 2 ] - Experimental Study and Modeling of Supercritical Extraction of Nicotine from Tabacco Leaves
In this work, the solubility of nicotine extracted from tobacco leaves, found in the north of Iran, in supercritical carbon dioxide has been measured. Also the effects of pressure, temperature, extraction dynamic time, and the organic co-Solvent on the amount of nicotine extracted from tobacco leaves have been investigated. It should be stressed that in order to reduce significantly the num...
[ 3 ] - Effect of Fracture Spacing on VAPEX Performance in Heavy Oil Fracture Systems
The vapor extraction (VAPEX) process, a solvent-based enhanced oil recovery process has been found promising for some heavy oil reservoirs. In this work, the VAPEX process is studied using a compositional simulator on a number of single-block and multiple block fractured systems. PVT data of one of an Iranian heavy oil reservoir are used to tune the equation of state. Effects of fracture sp...
[ 4 ] - Prediction of Hydrate Formation for the Systems Containing Single and Mixed Electrolyte Solutions
In this work the effect of electrolytes on hydrate formation was investigated. To do so, a new model was used in predicting the hydrate formation conditions in presence of both single and mixed electrolyte solutions. The new model is based on the van der Waals - Platteeuw hydrate equation of state. In order to evaluate the values for the activity of water in electrolyte solutions t...
[ 5 ] - An Estimation of Wave Attenuation Factor in Ultrasonic Assisted Gravity Drainage Process
It has been proved that ultrasonic energy can considerably increase the amount of oil recovery in an immiscible displacement process. Although many studies have been performed on investigating the roles of ultrasonic waves, based on the best of our knowledge, little attention has been paid to evaluate wave attenuation parameter, which is an important parameter in the determination of the energy...
[ 6 ] - بررسی ضریب فعالیت محلول‌های الکترولیتی و ضریب اسمزی مایع یونی ]4[BMIM][BF با استفاده از معادله حالت SAFT-MSA GV-
دراینپژوهش برای بررسی ضریب فعالیت محلول‌های الکترولیتی از معادله حالت "تئوری آماری سیال‌های تجمعی" یا "SAFT" استفاده شده است. در این معادله حالت برای در نظر گرفتن اثر حضور یون‌ها در محلول جمله MSA به معادله حالت اضافه شده است. معادله حالت SAFT دارای این ویژگی است که با استفاده از ترمودینامیک آماری و د...
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