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Mehdizadeh E.,Islamic Azad University at Qazvin | Afrabandpei F.,Islamic Azad University at Qazvin | Afrabandpei F.,Ilam Gas Treating Company | Mohaselafshar S.,Mazandaran University of Science and Technology | Afshar-Nadjafi B.,Islamic Azad University at Qazvin
Scientia Iranica | Year: 2013

Nowadays, Supply Chain Management (SCM) is an interesting problem that has attracted the attention of many researchers. Transportation network design is one of the most important fields of SCM. In this paper, an integrated multi-stage and multiproduct logistic network design including forward and reverse logistic is considered. At first, a Mixed Integer Nonlinear Programming model (MINLP) is formulated in such a way as to minimize purchasing and transportation costs. Then, a hybrid priority-based Genetic Algorithm (pb-GA), and Simulated Annealing algorithm (SA) are developed in two phases to find the proper solutions. The solution is represented by a matrix and a vector. Response Surface Methodology (RSM) is used in order to tune the significant parameters of the algorithm. Several test problems are generated in order to examine the proposed meta-heuristic algorithm performance. © 2013 Sharif University of Technology. All rights reserved.

Tavan Y.,National Iranian Gas Company | Tavan Y.,Ilam University | Hosseini S.H.,Ilam University | Kargari A.,Ilam Gas Treating Company
Journal of Natural Gas Science and Engineering | Year: 2016

The industrial ethane recovery column is modified by change in its operating conditions. In this contribution for the modified process, the influences of the reboiler temperature, column operating pressure and feed-inlet location are evaluated on the simulation results. Optimization of the retrofitted plant parameters is performed by using the practical method of response surface methodology (RSM) and the relevant cost estimation procedure. The best design is obtained and it is found that the production capacity is increased up to 18%, in comparison to the base case. © 2016 Elsevier B.V.

Taherifar H.,Ilam Gas Treating Company | Rezvantalab S.,Urmia University of Technology | Bahadori F.,Urmia University of Technology | Sadrzadeh Khoei O.,Statistics Expert
Journal of Water and Land Development | Year: 2015

The purpose of the current study is to experimentally investigate the reduction of sodium adsorption ratio (SAR) from a concentrated stream of reversed osmosis (RO) using natural zeolites. In order to reduce the salinity of solution, experiments were carried out using zeolites of varying concentration, pretreatment of adsorbents, and the addition of Ethylenediaminetetraacetic acid (EDTA). The results show that both zeolites can be used in an RO brine treatment; however, Rhyolitic tuff is more effective than clinoptilolite for the reduction of water salinity. The experiments show that Rhyolitic tuff decreases salinity of RO concentrate to nearly one - third of the initial value. Statistical analyses show that the effect of zeolite concentration is negligible. Furthermore, the addition of EDTA and pretreatment of zeolite increase the SAR values. © Polish Academy of Sciences (PAN) in Warsaw, 2015; © Institute of Technology and Life Sciences (ITP) in Falenty, 2015.

Heidaryan E.,Kermanshah University of Technology | Salarabadi A.,Ilam Gas Treating Company | Moghadasi J.,Petroleum University of Technology of Iran | Dourbash A.,University of Tehran | Dourbash A.,Research Institute of Petroleum Industry Kermanshah campus
Journal of Natural Gas Chemistry | Year: 2010

In petroleum exploration and production operations, gas hydrates pose serious flow assurance, economic and safety concerns. Thermodynamic inhibitors are widely used to reduce the risks associated with gas hydrate formation. In the present study, systematic laboratory work was undertaken to determine synergistic effects between methanol and a Poly Vinyl Methyl Ether as Low Dosage Hydrate Inhibitors (LDHIs). A valuable effect was discovered at a certain ratio of methanol to the low dosage hydrate inhibitor. Copyright © 2010, Dalian Institute of Chemical Physics, Chinese Academy of Sciences.

Heidaryan E.,Kermanshah University of Technology | Moghadasi J.,Petroleum University of Technology of Iran | Salarabadi A.,Ilam Gas Treating Company
Journal of Natural Gas Chemistry | Year: 2010

Abstract In recent years, there has been an increase of interest in the flow of gases at relatively high pressures and high temperatures. Hydrodynamic calculation of the energy losses in the flow of gases in conduits, as well as through the porous media constituting natural petroleum reservoirs, requires knowledge of the viscosity of the fluid at the pressure and temperature involved. Although there are numerous publications concerning the viscosity of methane at atmospheric pressure, there appears to be little information available relating to the effect of pressure and temperature upon the viscosity. A survey of the literature reveals that the disagreements between published data on the viscosity of methane are common and that most investigations have been conducted over restricted temperature and pressure ranges. Experimental viscosity data for methane are presented for temperatures from 320 to 400 K and pressures from 3000 to 140000 kPa by using falling body viscometer. A summary is given to evaluate the available data for methane, and a comparison is presented for that data common to the experimental range reported in this paper. A new and reliable correlation for methane gas viscosity is presented. Predicted values are given for temperatures up to 400 K and pressures up to 140000 kPa with Average Absolute Percent Relative Error (E ABS) of 0.794. © 2010 CAS/DICP.

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