Chemical Engineering
1. Study on Effect of inhibitor on wax precipitation in Iranian oil fields by using differential scanning calorimetry and microscopy

behrouz Bayati; mohsen mansouri; Hossein Hejazi

Articles in Press, Accepted Manuscript, Available Online from 14 July 2021

http://dx.doi.org/10.22050/ijogst.2021.275683.1585

Abstract
  In this study, effect of ethylene vinyl acetate (EVA) as an inhibitor on wax appearance temperature (WAT) of crude oil in the Iranian oil field has been investigated using differential scanning calorimetry (DSC) method. The effect of EVA on the morphology of crude oil wax crystals has been investigated ...  Read More

Chemical Engineering
2. Experimental optimization of the disinfection performance of sodium hypochlorite and hypochlorous acid in pilot and industrial cooling towers

Bahman Behzadi; Maziar Noei; Alireza Azimi; Masoume Mirzaei; Hossien Anaraki Ardakani

Volume 10, Issue 2 , Spring 2021

http://dx.doi.org/10.22050/ijogst.2021.265594.1578

Abstract
  Water can contain microorganisms and cause deposition and corrosion in cooling tower systems.Therefore, treatment of thewater of cooling towers is important and essential.Various biocides are used to remove bacteria and disinfect the water of cooling towers,the most commonly used of whichare sodium hypochlorite ...  Read More

Chemical Engineering
3. Techno-Economic Analysis of Heavy Fuel Oil Hydrodesulfurization Process for Application in Power Plants

Mostafa Jafari; Amirhossein Khalili-Garakani

Volume 10, Issue 1 , Winter 2021, , Pages 40-65

http://dx.doi.org/10.22050/ijogst.2020.254534.1569

Abstract
  In Iran, power plants use liquid fuels such as heavy fuel oil (HFO) or mazut to prevent disruption in power generation. The high percentage of sulfur compounds in HFO and the lack of efforts to remove it, causing significant damage to the environment. The purpose of this research is performing a techno-economic ...  Read More

Chemical Engineering
4. Boosting the Octane Number of Gasoline by Natural Gas Concentrated in Methane

Iqbal Iqbal Hossain; Manos Roy; Abir Debnath

Volume 10, Issue 1 , Winter 2021, , Pages 80-88

http://dx.doi.org/10.22050/ijogst.2020.211087.1530

Abstract
  Gasoline obtained from the fractionation of indigenous natural gas condensate has low octane number (78) and is therefore of limited uses. Lead-based octane boosting and catalytic reforming are not the viable methods for many fractionation plants. This study was therefore aimed to develop an inexpensive ...  Read More

Chemical Engineering
5. Application of SnO2/Alumina Nanocatalyst in Removal of Naphthenic Acids from Crude Oil

Taleb Eidy; Seyed Ali Hosseini; Ghasem Marandi

Volume 9, Issue 4 , Autumn 2020, , Pages 115-123

http://dx.doi.org/10.22050/ijogst.2020.250990.1565

Abstract
  The separation of naphthenic acids from crude oil is difficult, and the presence of such materials in crude oil reduces its value. In this work, using catalytic esterification with methanol, naphthenic acids of crude oil were removed to reduce their harmful effects. SnO2/γ-Al2O3 nanocatalyst was ...  Read More

Chemical Engineering
6. 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 , Summer 2020, , Pages 26-43

http://dx.doi.org/10.22050/ijogst.2020.198631.1519

Abstract
  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
7. A Robust Method to Predict Equilibrium and Kinetics of Sulfur and Nitrogen Compounds Adsorption from Liquid Fuel on Mesoporous Material

Mohammadreza Khosravi-Nikou; Ahmad Shariati; Mohammad Mohammadian; Ali Barati; Adel Najafi-Marghmaleki

Volume 9, Issue 2 , Spring 2020, , Pages 93-118

http://dx.doi.org/10.22050/ijogst.2019.147638.1477

Abstract
  This study presents a robust and rigorous method based on intelligent models, namely radial basis function networks optimized by particle swarm optimization (PSO-RBF), multilayer perceptron neural networks (MLP-NNs), and adaptive neuro-fuzzy inference system optimized by particle swarm optimization methods ...  Read More

Chemical Engineering
8. Investigating the Treatment of Oil and Gas Produced Water Using a Spray Dryer on a Bench Scale

Mohammad Razaghiyan; Mahmood Reza Rahimi; Hajir Karimi

Volume 9, Issue 1 , Winter 2020, , Pages 16-32

http://dx.doi.org/10.22050/ijogst.2019.196098.1514

Abstract
  The current work investigates the performance of a single-stage, bench-scale system using a spray dryer to treat produced water. The produced water is generated in three large reservoirs of Ahvaz, Maroon, and Mansouri fields, which have different compositions but the same high total dissolved solids ...  Read More

Chemical Engineering
9. Nitrogen Adsorption on Molecular Sieve Zeolites: An Experimental and Modeling Study

Erfan Tooraji; Ahad Ghaemi

Volume 9, Issue 1 , Winter 2020, , Pages 47-67

http://dx.doi.org/10.22050/ijogst.2019.186102.1506

Abstract
  Separation of nitrogen from a gaseous mixture is required for many industrial processes. In this study, the adsorption of nitrogen on zeolite 4A was investigated in terms of different adsorption isotherm models and kinetics. An increase in the initial pressure from 1 to 9 bar increases the amount of ...  Read More

Chemical Engineering
10. An Investigation into the Effect of Hydrotalcite Calcination Temperature on the Catalytic Performance of Mesoporous Ni-MgO-Al2O3 Catalyst in the Combined Steam and Dry Reforming of Methane

Gholamreza Roohollahi; Mohammadreza Ehsani

Volume 8, Issue 4 , Autumn 2019, , Pages 64-84

http://dx.doi.org/10.22050/ijogst.2018.132105.1456

Abstract
  Several mesoporous nickel-based catalysts with MgO-Al2O3 as the catalyst support were prepared using a co-precipitation method at a constant pH. The supports were prepared from the decomposition of an Mg-Al hydrotalcite-like structure which had already been prepared with Mg/Al=1. Prior to impregnating ...  Read More

Chemical Engineering
11. Prediction of Dispersed Phase Holdup in the Kühni Extraction Column Using a New Experimental Correlation and Artificial Neural Network

Mohsen Keshavarz; Ahad Ghaemi; Mansour Shirvani; Ebrahim Arab

Volume 8, Issue 4 , Autumn 2019, , Pages 85-105

http://dx.doi.org/10.22050/ijogst.2018.143946.1472

Abstract
  In this work, the dispersed phase holdup in a Kühni extraction column is predicted using intelligent methods and a new empirical correlation. Intelligent techniques, including multilayer perceptron and radial basis functions network are used in the prediction of the dispersed phase holdup. To design ...  Read More

Chemical Engineering
12. An Experimental Study on the Operating Parameters of Ultrasound-assisted Oxidative Desulfurization

Seyede Leila Ebrahimi; Mohammadreza Khosravi-Nikou; Seyed Hassan Hashemabadi

Volume 8, Issue 3 , Summer 2019, , Pages 1-17

http://dx.doi.org/10.22050/ijogst.2019.171123.1492

Abstract
  In this research, the effects of important parameters, including the molar ratio of acetic acid to sulfur(S) , sonication time, temperature, and hydrogen the molar ratio of peroxide to sulfur on the performance of ultrasound-assisted oxidative desulfurization were studied using the response surface method ...  Read More

Chemical Engineering
13. The Selection of Amine Solvent in Gas Treating Process Considering Physical and Process Criteria Using Multiple Criteria Decision-making Techniques: A Case Study of Ilam Gas Treating Company

Masoud Seidi; Mohsen Khezeli; Behrouz Bayati; Esmaeil Najafi

Volume 8, Issue 3 , Summer 2019, , Pages 73-88

http://dx.doi.org/10.22050/ijogst.2017.93209.1396

Abstract
  In the current work, a framework is presented for amine solvent selection in gas treating process. Since the appropriate decision making in this field affects the capital and operational costs, multi attribute decision making (MADM) techniques were used to rank alternatives. The determination of criteria ...  Read More

Chemical Engineering
14. Impact of H2S Content and Excess Air on Pollutant Emission in Sour Gas Flares

Ahmed Zoeir; Alireza Tabatabaei Nejad; Elnaz Khodapanah

Volume 8, Issue 1 , Winter 2019, , Pages 1-10

http://dx.doi.org/10.22050/ijogst.2018.127937.1450

Abstract
  In sour gas flares,  content like any other components in inlet gas influences adiabatic flame temperature, which, in turn, impacts on the pollutant emission. Wherever flame temperature increases, the endothermic reaction between  and  is accelerated, which means higher  emission ...  Read More

Chemical Engineering
15. Viscosity Reduction of Heavy Crude Oil by Dilution Methods: New Correlations for the Prediction of the Kinematic Viscosity of Blends

Saeed Mohammadi; Mohammad Amin Sobati; Mohammad Sadeghi

Volume 8, Issue 1 , Winter 2019, , Pages 60-77

http://dx.doi.org/10.22050/ijogst.2018.97887.1405

Abstract
  Dilution is one of the various existing methods in reducing heavy crude oil viscosity. In this method, heavy crude oil is mixed with a solvent or lighter oil in order to achieve a certain viscosity. Thus, precise mixing rules are needed to estimate the viscosity of blend. In this work, new empirical ...  Read More

Chemical Engineering
16. CFD Simulation of Parameters Affecting Hydrodynamics of Packed Beds: Effects of Particle Shape, Bed Size, and Bed Length

Saeid Mohammadmahdi; Ali Reza Miroliaei

Volume 8, Issue 1 , Winter 2019, , Pages 78-102

http://dx.doi.org/10.22050/ijogst.2018.104379.1418

Abstract
  Packed bed reactors have many applications in different industries such as chemical, petrochemical, and refinery industries. In this work, the effects of some parameters such as the shape and size of particles, bed size, and bed length on the hydrodynamics of the packed beds containing three spherical, ...  Read More

Chemical Engineering
17. Prediction of the Products Yield of Delayed Coking for Iranian Vacuum Residues

Farshad Torabi Esfahani; Javad Ivakpour; Mohammadreza Ehsani

Volume 7, Issue 3 , Summer 2018, , Pages 53-64

http://dx.doi.org/10.22050/ijogst.2017.102019.1415

Abstract
  In this work, new correlations are proposed to predict the products yield of delayed coking as a function of CCR and temperature based on the experimental results. For this purpose, selected Iranian vacuum residues with Conradson carbon residue (CCR) values between 13.40-22.19 wt.% were heated at a 10 ...  Read More

Chemical Engineering
18. The Effect of Different Electrodes on Humic Acid Removal by Electrocoagulation

Farhad Asgharyan; Mohammadreza Khosravi Nikou; Bagher Anvaripour; Iman Danaee

Volume 7, Issue 2 , Spring 2018, , Pages 52-63

http://dx.doi.org/10.22050/ijogst.2018.65739

Abstract
  The present study is about the reduction of humic acids (HA) by electrocoagulation (EC) method. Undesirable color, odor, taste, reacting with chlorine to produce toxic materials in water, and making a complex with heavy metal ions are some unfavorable environmental consequences of HA. Platinum and graphite ...  Read More

Chemical Engineering
19. Catalytic Oxidation of Carbon Monoxide by Cobalt Oxide Catalysts Supported on Oxidized-MWCNT

Mahnaz Pourkhalil; Saeideh Tasharrofi

Volume 7, Issue 2 , Spring 2018, , Pages 79-90

http://dx.doi.org/10.22050/ijogst.2017.105780.1421

Abstract
  Cobalt oxide catalysts supported on oxidized multi-walled carbon nanotubes (MWCNT) for the low-temperature catalytic oxidation of carbon monoxide were prepared by an impregnation-ultrasound method. These catalysts were characterized by N2 adsorption/desorption, TEM, XRD, Raman, and H2-TPR methods. The ...  Read More

Chemical Engineering
20. Artificial Intelligence for Inferential Control of Crude Oil Stripping Process

Mehdi Ebnali; Mehdi Shahbazian; Houshang Jazayerirad

Volume 7, Issue 1 , Winter 2018, , Pages 70-92

http://dx.doi.org/10.22050/ijogst.2017.54928.1337

Abstract
  Stripper columns are used for sweetening crude oil, and they must hold product hydrogen sulfide content as near the set points as possible in the faces of upsets. Since product    quality cannot be measured easily and economically online, the control of product quality is often achieved ...  Read More

Chemical Engineering
21. A Numerical Study on Using Air Cooler Heat Exchanger for Low Grade Energy Recovery from Exhaust Flue Gas in Natural Gas Pressure Reduction Stations

Mansoor Naderi; Ghasem Zargar; Ebrahim Khalili

Volume 7, Issue 1 , Winter 2018, , Pages 93-109

http://dx.doi.org/10.22050/ijogst.2018.55741

Abstract
  Heat EXchangers (HEX) that are used in City Gate Station (CGS) systems are modeled numerically to recover the exhaust waste heat. It was tried to find the best viscous model to obtain results in accordance with experimental results and to change the heat exchanger design. This HEX is used for recovering ...  Read More

Chemical Engineering
22. Mathematical Modeling and Numerical Simulation of CO2 Removal by Using Hollow Fiber Membrane Contactors

Mohammad Mesbah; Masumeh Jafari; Ebrahim Soroush; Shohreh Shahsavari

Volume 6, Issue 4 , Autumn 2017, , Pages 80-96

http://dx.doi.org/10.22050/ijogst.2017.53913

Abstract
  Abstract In this study, a mathematical model is proposed for CO2 separation from N2/CO2 mixtureusing a hollow fiber membrane contactor by various absorbents. The contactor assumed as non-wetted membrane; radial and axial diffusions were also considered in the model development. The governing equations ...  Read More

Chemical Engineering
23. A Molecular Simulation of Natural Gas Dehydration by 3A Zeolite Nanostructure

behrouz Bayati; Mahmoud Rahmati

Volume 6, Issue 3 , Summer 2017, , Pages 68-78

http://dx.doi.org/10.22050/ijogst.2018.57856

Abstract
  The adsorption and separation properties of 3A zeolite are investigated by using Grand Canonical Monte Carlo (GCMC) simulation. To obtain the adsorption isotherms of water, methyl mercaptan, and methane on 3A zeolite, COMPASS Force Filed is used. The adsorption isotherms of the pure components and the ...  Read More

Chemical Engineering
24. An Experimental Investigation of Reactive Absorption of Carbon Dioxide into an Aqueous NH3/H2O/NaOH Solution

Ahad Ghaemi; Vahid Hashemzadeh; Shahrokh Shahhosseini

Volume 6, Issue 3 , Summer 2017, , Pages 55-67

http://dx.doi.org/10.22050/ijogst.2017.57858

Abstract
  In this research, the reactive absorption of carbon dioxide in an aqueous solution of NH3, H2O, and NaOH has experimentally been investigated. The experiments were carried out in an absorption pilot plant in different operational conditions. The composition and temperature of both gas and liquid phases ...  Read More

Chemical Engineering
25. 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 , Spring 2017, , Pages 17-32

http://dx.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