Marun Petrochemical Company

Mahshahr, Iran

Marun Petrochemical Company

Mahshahr, Iran
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Ahmadpour E.,Petroleum University of Technology of Iran | Shamsabadi A.A.,Petroleum University of Technology of Iran | Shamsabadi A.A.,Marun Petrochemical Company | Behbahani R.M.,Petroleum University of Technology of Iran | And 2 more authors.
Journal of Natural Gas Science and Engineering | Year: 2014

Separation of CO2 from CH4 is a part of gas sweetening process for natural gas treatment. In the present study, Poly (amide - 6 - b - ethylene oxide) (Pebax MH 1657) copolymer was used as a selective layer to prepare PVC/Pebax composite membrane for CO2 capturing. Gas permeation and transport characteristics of single and mixed gases for CO2 and CH4 were investigated and analyzed using constant pressure method. Trans-membrane pressure and temperature were varied from 5 to 15bar and 20-50°C respectively. The temperature dependency of selectivity for CO2/CH4 was decreased noticeably with an increase in temperature, whereas the permeability of both gases increased dramatically. Furthermore, the enhancement of CO2 permeability with increase in gas pressure was probably due to the plasticization of membrane caused by relatively high solubility of CO2 in the membrane. Mixed gases experiments were conducted with different concentration of CO2 at constant temperature and pressure. Permeation measurement showed a steep decline on the membrane selectivity as the partial pressure of CO2 decreased. © 2014 Elsevier B.V.

Arabi Shamsabadi A.,Petroleum University of Technology of Iran | Arabi Shamsabadi A.,Marun Petrochemical Company | Kargari A.,Amirkabir University of Technology | Bahrami Babaheidari M.,Petroleum University of Technology of Iran
International Journal of Hydrogen Energy | Year: 2014

In this work, PDMS/PEI membranes were synthesized and sorption and permeation of H2/CH4 mixture were studied. The influence of pressure, temperature and feed composition were investigated. It was shown that permeances increased and selectivity decreased with an increment in the feed temperature. Increasing feed pressure caused a decline in gas permeance and increased selectivity. Higher concentrations of hydrogen in the feed declined the selectivity. The effect of different non-solvents was explained by their effect on precipitation time and it was concluded that water made the membrane denser while isopropanol forms a sponge-like structure. Coagulation bath temperature made the membrane denser. Film casting and dip-coating techniques were used to prepare selective membranes. Obtained selectivity results introduced dip-coating as a better method than film casting. Sequential coating improved selectivity of the prepared membrane. Finally, sequential coating with different concentrations was applied and enhanced selectivity significantly from about 22 to more than 70. Copyright © 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

Salehi E.,Arak University | Madaeni S.S.,Razi University | Shamsabadi A.A.,Marun Petrochemical Company | Laki S.,Marun Petrochemical Company
Ceramics International | Year: 2014

Fouling and subsequent disruption of filter coalescers due to deposition of coke particles is a crucial concern for petrochemical and oil-refinery plants. Our previous study confirmed that the γ-alumina ceramic microfiltration membranes could successfully remove coke particles from petrochemical oily wastewater. The aim of the current study is preliminary design and economic evaluation for implementation of ceramic membrane unit (CMU), as a pretreatment for coalescer filtration unit, to elucidate the applicability of the process in petrochemical wastewater treatment. Using CMU not only increases the lifetime of the filter coalescers but also introduces a supplementary source for the production of dilution-steam-water (DSW). Two types of ceramic membranes, including 7- and 19-channel modules, were analyzed with the latter providing better performance for the full-scale application. Total number of the required membrane modules was calculated considering the fact that one flow pass through the tubular membrane is adequate for the reasonable elimination of coke particles from the feed. Accordingly, a continuous cross-flow filtration procedure provided with a system of concentrate recycle was suggested. Total capital investment elements were calculated for the CMU implementation. Economic studies showed that the break-even point (BEP) and payback period (PBP) are near 3% and 2 yr, respectively. The results indicated that the CMU is a potential pretreatment for coke removal from petrochemical effluents. © 2013 Elsevier Ltd and Techna Group S.r.l.

Sabzevari S.A.,Isfahan University of Technology | Sabzevari S.A.,Marun Petrochemical Company | Sadeghi M.,Isfahan University of Technology | Mehrabani-Zeinabad A.,Isfahan University of Technology
Macromolecular Chemistry and Physics | Year: 2013

A new model for prediction of the effective permeability of gases in mixed matrix membranes (MMMs), considering the effects of particle shape and the interfacial layer, is presented. The proposed model treats core filler particles and interfacial shell layers as complex particles. Moreover, the Bruggman mathematical procedure is used to improve the accuracy of the presented model for high concentrations of fillers in MMMs. Also, an appropriate uniform criterion is established to make efficient use of the new model for various experimental data to avoid the need for curve-fitting procedures. Finally, the proposed model is examined for several sets of experimental data. A new model is presented for the effective permeability in mixed-matrix membranes. The effects of the interfacial shell layer and particle shape are considered. Furthermore a new criterion is established for estimation of shell-layer properties. The new model and established criterion are evaluated according to experimental data and found to provide a reasonably good fit. © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Saedi S.,Razi University | Madaeni S.S.,Razi University | Seidi F.,Islamic Azad University at Sanandaj Branch | Shamsabadi A.A.,Marun Petrochemical Company | Laki S.,Marun Petrochemical Company
Chemical Engineering Journal | Year: 2014

In the current study, a novel water insoluble Poly (acrylonitrile-co-N, N-Dimethylaminopropyl acrylamide) [PAN-PDMAPAM] copolymer was synthesized and employed as a CO2 carrier in an integrally-skinned asymmetric polyethersulfone (PES) membrane. The membranes provided the facilitated transport in addition to the solution-diffusion mechanism in PES membranes for the separation of CO2 from CH4. Differential Scanning Calorimetry was used for investigating the change in the glass transition temperature of the PES and miscibility of the PES and synthesized PAN-PDMAPAM. Scanning Electron Microscopy (SEM) and porosity measurement were used to study the effect of PAN-PDMAPAM on the membrane morphology. The effects of the synthesized PAN-PDMAPAM on the gas sorption capacity and the dual-mode parameter of the PES membranes were studied using sorption isotherms. The addition of PAN-PDMAPAM changes the morphology, increases the CO2 sorption capacity and decreases the glass transition temperature (Tg) as well as Langmuir sorption sites of the prepared PES membranes. An improvement can be seen in the plasticization when the PAN-PDMAPAM concentration was 0.5 and 1wt.%. Introducing the PAN-PDMAPAM in PES membranes significantly improves the membrane performance including CO2 permeance and CO2/CH4 selectivity because of the incorporation of the facilitated transport of CO2. The addition of PAN-PDMAPAM in the PES membranes changes the behavior of the PES membrane against the feed temperature and the feed pressure. It was shown that the application of PES/PAN-PDMAPAM membranes is limited to ambient temperature because at the elevated temperatures, the equilibrium constant of the facilitated transport reaction is small, and hence the permeation of CO2 decreases. © 2013 Elsevier B.V.

Saedi S.,Razi University | Madaeni S.S.,Razi University | Hassanzadeh K.,Islamic Azad University at Sanandaj Branch | Shamsabadi A.A.,Marun Petrochemical Company | Laki S.,Marun Petrochemical Company
Journal of Industrial and Engineering Chemistry | Year: 2014

In the present study, asymmetric gas separation membranes of polyethersulfone (PES) and polyethersulfone/polyurethane (PU) were prepared with different blend compositions. The prepared membranes were investigated for the separation of carbon dioxide from methane. The effect of PU on the microstructure and d-spacing of the membranes was studied by X-ray diffraction analysis and the miscibility of PES and PU was investigated using Differential Scanning Calorimetry (DSC). The thermal properties of PES and PES/PU were compared using Thermal Gravimetric Analysis (TGA). The effect of PES/PU blend composition on the morphology and porosity of the membrane was investigated by Scanning Electron Microscopy (SEM) and porosity experiments. Density Functional Theory (DFT) calculations were used to investigate the relative affinity of CO2, CH4 and H2O for PES and PU. Moreover, the effect of PU on the casting solution viscosity, gas sorption and mechanical properties of the PES membrane was investigated. For comparing gas separation performance of PES and PES/PU membranes, pure and mixed gas experiments were carried out. The obtained results indicated that the presence of PU in the casting solution increases the d-spacing and fractional free volume, and decreases the membrane porosity; Tg and thermal resistance, membrane gas sorption as well as CO2 induced plasticization by decreasing Langmuir capacity, and also increases strength at yield and elongation at yield of PES membrane. The presence of PU decreases the CO2 permeance and enhances the CO2/CH4 selectivity and plasticization pressure of the PES membrane. Furthermore, the presence of the PU changes the membrane behavior against the feed pressure, feed temperature and feed composition in the mixed gas experiments. © 2013 The Korean Society of Industrial and Engineering Chemistry.

Madaeni S.S.,Razi University | Vatanpour V.,Razi University | Ahmadi Monfared H.,Razi University | Arabi Shamsabadi A.,Marun Petrochemical Co. | And 2 more authors.
Industrial and Engineering Chemistry Research | Year: 2011

In this paper, an experimental study of a polymeric PVDF microfiltration membrane is presented for complete removal of coke particles from the industrial wastewater of Marun Petrochemical Company. The operation parameters such as applied pressure, cross-flow velocity, and feed temperature were investigated. The effect of coke concentration in filtration of the synthetic feed showed that coke particles did not transport from the membrane in all concentrations and sequence filtrations. In addition, 100% rejection of coke particles was kept constant by changing the operation parameters or using different cleaning agents due to suitable selection of pore size and polymeric materials of the applied membrane. At higher applied pressures, the higher flux is obtained due to the higher driving force toward the membrane. Feed flux was enhanced by increasing the cross-flow velocity explained by raising mass transfer coefficient in the concentration boundary layer and producing more shear stress on the membrane surface. Three different types of cleaning agents (HCl, NaOH, and NaOCl) were used for feed flux recovery of the fouled membranes. Flux recovery results and surface SEM images of the cleaned membranes indicated that most of the foulants were successfully removed using NaClO as chemical cleaner. The sequence of cleaning agent effect on flux recovery was NaOCl > NaOH > HCl. Hypochlorite solution due to having oxidizing properties in addition to alkali properties resulted in a higher cleaning efficiency compared to NaOH. © 2011 American Chemical Society.

Saedi S.,Razi University | Madaeni S.S.,Razi University | Shamsabadi A.A.,Marun Petrochemical Company
Chemical Engineering Research and Design | Year: 2014

Polyetherimide (PEI) was used as a polymeric additive for preparing an asymmetric polyethersulfone (PES) membrane for the separation of CO2 from CH4. In pure gas experiments, the higher skin layer thickness and the lower porosity of the sub layer for the membrane prepared from the polymer blend with the composition of 98:2 lead to an increase in CO2/CH4 selectivity and a decrease in the CO2 permeance in contrast with a pristine PES. For higher PEI contents, the higher fractional free volume of the membranes improves the gas permeance and reduces the CO2/CH4 selectivity. The incorporation of PEI in PES reduces the CO2 sorption in PES via decreasing the non-equilibrium free volume and imparts antiplasticization properties to the membrane. © 2014 The Institution of Chemical Engineers.

Saedi S.,Razi University | Madaeni S.S.,Razi University | Seidi F.,Islamic Azad University at Sanandaj Branch | Shamsabadi A.A.,Marun Petrochemical Company | Laki S.,Marun Petrochemical Company
International Journal of Greenhouse Gas Control | Year: 2013

In the current study, we prepared a novel water insoluble Amino-Starch (AS) derivative using Williamson ether synthesis method. The prepared AS was used as a polymeric additive for the preparation of an integrally skinned asymmetric polyethersulfone (PES) membrane. The PES/AS membranes were combined with a facilitated transport mechanism and solution-diffusion mechanism in an integrally skinned asymmetric membrane for the separation of CO2 from CH4 for the first time. The miscibility of PES and the synthesized AS was confirmed by Differential Scanning Calorimetry (DSC). The change in the membrane morphology was investigated using Scanning Electron Microscopy (SEM). The sorption isotherms were obtained to investigate the effect of the AS on the membrane gas sorption capacity. Introducing the AS into the PES membranes leads to a denser sub-layer and a higher CO2 sorption capacity of the prepared membranes. A higher CO2 permeation, a lower CH4 permeation and a higher CO2/CH4 selectivity are the most important changes in the performance of the PES membranes caused by the incorporation of a facilitated transport in CO2 permeation and a denser sub-layer of the prepared membranes. Furthermore, the glass transition temperature (Tg) as well as the non-equilibrium free volume of the PES membranes was decreased and the plasticization pressure of the PES membranes was improved by introducing the AS into the PES membranes. The incorporation of the facilitated transport mechanism in the PES/AS membranes altered the membrane behavior against the change in the feed pressure and the feed temperature. © 2013 Elsevier Ltd.

Madaeni S.S.,Razi University | Ahmadi Monfared H.,Razi University | Vatanpour V.,Razi University | Arabi Shamsabadi A.,Marun Petrochemical Co. | And 4 more authors.
Desalination | Year: 2012

Destruction of coalescer filters by coke particles is an important concern faced with polyolefin units of petrochemical plants. A lot of fund and time is wasted for reclogging/substituting the coalescer filters. In the current work, γ-Al2O3 based ceramic microfiltration membrane was utilized to remove coke particles from petrochemical wastewaters before introducing to the coalescers. Perfect elimination of coke particles from oily wastewaters was achieved. Influence of temperature and some operating conditions such as filtration time and reusability was examined. Analysis results showed that the extent of volatile organic compounds (VOC) was not noticeably changed after the process; however, suspended solids were effectively retained by the ceramic membrane. The results indicated that most of the light organic compounds (e.g. gasoline) passed through the membrane but the troubling coke particles did not. By increasing temperature, the flux was increased due to viscosity reduction as well as solvents diffusivity enhancement. Microfiltration was performed at constant trans-membrane pressure of 15bar, cross-flow velocity of 2m/s and various temperatures (20-80°C). Moreover, reusability of the membranes was examined using HCl, NaOH and SDS as eluting agents. Normal flux recovery was obtained utilizing NaOH whereas HCl did not suggest an acceptable flux recovery. © 2012 Elsevier B.V.

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