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Synthesis of a PEBAX-1074/ZnO nanocomposite membrane with improved CO_2 separation performance

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Journal of Energy Chemistry 2017年第3期26卷 454-465页

作者： Navid Azizi Toraj Mohammadi reza Mosayebi behbahani Research and Technology Center of Membrane Processes Chemical Engineering DepartmentIran University of Science and Technology (IUST) Gas Engineering Department Petroleum University of Technology

In this investigation, polymeric nanocomposite membranes（PNMs） were prepared via incorporating zinc oxide（ZnO） into poly（ether-block-amide）(PEBAX-1074) polymer matrix with different loadings. The neat membrane and nanocomposite membranes were prepared via solution casting and solution blending methods, respectively. The fabricated membranes were characterized by field emission scanning electron microscopy（FESEM） to survey cross-sectional morphologies and thermal gravimetric analysis（TGA）to study thermal stability. Fourier transform infrared（FT-IR） and X-ray diffraction（XRD） analyses were also employed to identify variations of the chemical bonds and crystal structure of the membranes, respectively. Permeation of pure gases, CO, CHand Nthrough the prepared neat and nanocomposite membranes was studied at pressures of 3–18 bar and temperature of 25 °C. The obtained results showed that the fabricated nanocomposite membranes exhibit better separation performance compared to the neat PEBAX membrane in terms of both permeability and selectivity. As an example, at temperature of 25 °C and pressure of 3 bar, COpermeability, ideal CO/CHand CO/Nselectivity values for the neat PEBAX membrane are 110.67 Barrer, 11.09 and 50.08, respectively, while those values are 152.27 Barrer,13.52 and 62.15 for PEBAX/ZnO nanocomposite membrane containing 8 wt% ZnO.

关键词： Nanocomposite membrane ZnO nanoparticles PEBAX-1074 CO2/CH4 separation

Effect of TiO2 loading on the morphology and CO2/CH4 separation performance of PEBAX-based membranes

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Frontiers of Chemical Science and Engineering 2019年第3期13卷 517-530页

作者： Navid Azizi Mojgan Isanejad Toraj Mohammadi reza M. behbahani Research and Technology Center of Membrane Processes Chemical Engineering DepartmentIran University o f Science and Technology (IUST)NarmakTehranIran Gas Engineering Department Petroleum University of TechnologyAhwazIran

Membranes have attracted much attention as economical methods for industrial chemical processes. The effects of the titanium dioxide nanoparticle load on the morphology and CO2/CH4 separation performance of poly (ether-block-amide)(PEBAX-1657) mixed matrix membranes (MMMs) were investigated from pressures of 3-12 bar and temperatures of 30℃-60℃. The PEBAX membranes were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, thermal gravimetric analysis, atomic force microscopy and tensile strength analysis. The incorporation of TiO2 nanoparticles into the polymeric MMMs improved the CO2/CH4 gas separation performance (both the permeability and selectivity) of the membranes. The CO2 permeability and ideal CO2/CH4 selectivity values of the nanocomposite membrane loaded with 8 wt-% TiO2 were 172.32 Barrer and 24.79, respectively whereas those of the neat membrane were 129.87 Barrer and 21.39, respectively.

关键词： mixed matrix membrane TiO2 nanoparticles PEBAX-1657 C02/CH4 separation

Sand mining disturbances and their effects on the diversity of arbuscular mycorrhizal fungi in a riparian forest of Iran

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Journal of Arid Land 2017年第6期9卷 837-849页

作者： Sareh MORADI behbahani Mostafa MORADI reza BASIRI Javad MIRZAEI Department of Forestry Faculty of Natural Resources and Environment B ehbahan Khatam A1-Anbia University of Technology Behbahan *** Iran Department of Forest Science Faculty of Agriculture Ilam University Ilam 69315516 Iran

The major objective of this study was to evaluate the effects of sand mining disturbances on the diversity of arbuscular mycorrhizal fungi（AMF）. In addition, the proportional changes in the diversity of AMF to the distances from riverbanks were assessed. For this purpose, the riparian forest of the Maroon River, Iran was divided into three locations with a 200-meter wide zone in between. Thus, the locations studied were named Distance I（riverbank）, Distance II（intermediate）, and Distance III（farthest from riverbank）. In each of these distances, 10 Tamarix arceuthoides and Populus euphratica of each species were randomly selected. At the same time, soil and root samples were collected from the rhizosphere of the tree species studied. Results indicated that totally 13 AMF species were observed in T. arceuthoides and 19 AMF species were recorded in P. euphratica rhizosphere belonging to 6 genera and 6 families. In these AMF species, Glomus segmentatum, G. geosporum, G. rubiforme, G. nanolumen, G. spinuliferum, Claroideoglomus drummondii, Gigaspora gigantea and Acaulospora paulinae appeared only in P. euphratica rhizosphere, while G. multiforum and Claroideoglomus claroideum were observed only in T. arceuthoides rhizosphere. Moreover, Distance II had the least AMF species both in T. arceuthoides and in P. euphratica rhizospheres, and also the least spore density and root colonization rate. Our results are important in that they provide a list of resistant AMF species that could be used in the conservation of biodiversity.

关键词： arbuscular mycorrhizal disturbance riparian forest sand mining Maroon River

Calibration and validation of a new time-based surrogate safety measure using fuzzy inference system

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Journal of Traffic and Transportation Engineering(English Edition) 2016年第1期3卷 51-58页

作者： Navid Nadimi Hamid behbahani Hamid reza Shahbazi School of Civil Engineering Iran University of Science and TechnologyTehranIran Power Electrical Faculty Shahid Rajaee Teacher Training UniuersityTehranIran

Surrogate safety measures （SSM） are suitable tools to detect dangerous situations. These indicators can be applied as a warning strategy in collision avoidance systems （CAS）. Timeto-collision （TTC） and post-encroachment time （PET） are two important time-based SSM that identify the probability of a rear-end collision. TIC refers to the imminent danger, and PET implies the potential danger. However, sometimes the results from each indicator are inconsistent. An appropriate warning strategy for CAS can be developed using a new index that combines the properties of both TTC and PET. For this purpose, a new mixed index （MI） is proposed. In order to develop this MI, three main microscopic parameters, clearance, speed and the relative speed, are simultaneously applied to the leading vehicle. To cali- brate MI, based on a fuzzy inference system （FIS）, a value would be determined by a combination of TTC and PET at each instant and then by regression analysis the model parameters would be determined. Finally, MI, TIC and PET values for real car-following scenarios on the 1-80 freeway are determined and compared. The results show that MI may be more suitable in detecting the rear-end collision risk within the proper time and with less errors.

关键词： Surrogate safety measureTime-to-collisionPost-encroachment timeFuzzy inference system

Solving asphaltene precipitation issue in vertical wells via redesigning of production facilities

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Petroleum 2015年第2期1卷 139-145页

作者： Mahdi Zeinali Hasanvand Mohammad Ali Ahmadi reza Mosayebi behbahani Research Institute of Petroleum Industry(RIPI) TehranIran Department of Petroleum Engineering Ahwaz Faculty of Petroleum EngineeringPetroleum University of TechnologyAhwazIran Department of Gas Engineering Ahwaz Faculty of Petroleum EngineeringPetroleum University of TechnologyAhwazIran

Precipitation of heavy hydrocarbon components such as Wax and Asphaltenes are one of the most challenging issues in oil production *** associated complications extend from the reservoir to refineries and petrochemical *** is most destructive when the affected areas are hard to reach,for example the wellbore of producing *** work demonstrates the effect of adjusting choke valve sizes on thermodynamic parameters of fluid flowing in a vertical *** simulation results revealed optimum choke valve sizes that could keep producing vertical wells away from Asphaltene *** results of this study were implemented on a well in Darquin Reservoir that had been experiencing asphaltene *** analysis of reservoir fluid,Asphaltene tests and thermodynamic simulations of well column were carried out and the most appropriate size of choke valve was *** replacing the well's original choke valve with the suggested choke valve,the Asphaltene precipitation problem diminished.

关键词： Asphaltene precipitation Vertical well Choke valve Thermodynamic parameters Well column

Experimental study and a proposed new approach for thermodynamic modeling of wax precipitation in crude oil using a PC-SAFT model

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Petroleum Science 2016年第1期13卷 155-166页

作者： Taraneh Jafari behbahani Research Institute of Petroleum Industry (RIPI) P.O.Box 14665-1998 Tehran Iran

A powerful method is necessary for thermodynamic modeling of wax phase behavior in crude oils,such as the perturbed-chain statistical associating fluid theory（PC-SAFT）.In this work,a new approach based on the wax appearance temperature of crude oil was proposed to estimate PC-SAFT parameters in thermodynamic modeling of wax precipitation from crude *** proposed approach was verified using experimental data obtained in this work and also with those reported in the *** order to compare the performance of the PC-SAFT model with previous models,the wax precipitation experimental data were correlated using previous models such as the solid solution model and multi-solid phase *** results showed that the PC-SAFT model can correlate more accurately the wax precipitation experimental data of crude oil than the previous models,with an absolute average deviation less than 0.4 %.Also,a series of dynamic experiments were carried out to determine the rheological behavior of waxy crude oil in the absence and presence of a flow improver such as ethylene–vinyl acetate *** was found that the apparent viscosity of waxy crude oil decreased with increasing shear ***,the results showed that the performance of flow improver was dependent on its molecular weight.

关键词： crude deviation thermodynamic viscosity copolymer appearance rheological hydrocarbons verified powerful

Developing grey-box model to diagnose asphaltene stability in crude oils: Application of refractive index

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Petroleum 2016年第4期2卷 369-380页

作者： Mahdi Zeinali Hasanvand Mohammad Ali Ahmadi reza Mosayebi behbahani Farzaneh Feyzi Department of Chemical Engineering Ahwaz Faculty of Petroleum EngineeringPetroleum University of TechnologyAhwazIran Department of Petroleum Engineering Ahwaz Faculty of Petroleum EngineeringPetroleum University of TechnologyAhwazIran Department of Chemical Engineering Iran University of Science and TechnologyTehranIran

Asphaltene precipitation can cause serious problems in petroleum industry while diagnosing the asphaltene stability conditions in crude oil system is still a challenge and has been subject of many *** monitor and diagnose asphaltene stability,high performance intelligent approaches based bio-inspired science like artificial neural network which have been optimized by various optimization techniques have been carried *** main purpose of the implemented optimization algorithms is to decide high accurate interconnected weights of proposed neural network *** proposed intelligent approaches are examined by using extensive experimental data reported in open ***,to highlight robustness and precision of the addressed approaches,two different regression models have been developed and results obtained from the aforementioned intelligent models and regression approaches are compared with the corresponding refractive index data measured in *** on the results,hybrid of genetic algorithm and particle swarm optimization have high performance and average relative absolute deviation between the model outputs and the relevant experimental data was found to be less than 0.2%.Routs from this work indicate that implication of HGAPSO-ANN in monitoring refractive index can lead to more reliable estimation of addressed issue which can lead to design of more reliable phase behavior simulation and further plans of oil production.

关键词： Asphaltene Refractive index Stability Evolutionary algorithm Neural network

A Green Route for the One-Pot Synthesis of 1,2-Disubstituted Benzimidazoles Using Iron（Ill） Phosphate under Solventless Conditions

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Chinese Journal of Chemistry 2012年第1期30卷 65-70页

作者： behbahani,F.K. Ziaei,Parisa Department of Chemistry Karaj BranchIslamic Azad UniversityKarajIran

1,2-Disubstituted benzimidazoles are selectively synthesized in high yields under extremely mild conditions via the condensation of o-phenylenediamine derivatives with aldehyde derivatives using catalytic amount of iron（Ⅲ） phosphate under solventfree conditions. The use of readily available iron（Ⅲ） phosphate as a reusable and recyelable catalyst makes this process quite simple, convenient, and environment-friendly.

关键词： 1,2-disubstituted benzimidazoles iron(Ill) phosphate solvent-free

Numerical modeling of cavitation on spillway＇s flip bucket

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Frontiers of Structural and Civil Engineering 2016年第4期10卷 438-444页

作者： Abbas PARSAIE Sadegh DEHDAR-behbahani Amir Hamzeh HAGHIABI Department of water Engineering Lorestan University Khorramabad Iran Hydro Structures Shahid Chamran University Ahvaz Iran

Numerical modeling of hydraulic phenomenon by computational fluid dynamic （CFD） approaches is one of the main parts in the high cost hydraulic structure studies. In this paper, using Flow 3D as CFD commercial tool, the cavitation phenomenon was assessed along spillway＇s flip bucket of the Balaroud dam. Performance of numerical modeling was compared to the physical model, which was constructed to this purpose. During numerical modeling, it was found that RNG turbulence model is a suitable performance for modeling the cavitation. Physical modeling shows that minimum cavitation index is about 0.85 and minimum cavitation index based on Flow 3D results is about 0.665, which was related to the flood discharge with return period of 10000 years. The main difference between numerical and physical modeling is related to the head of velocity, which is considered in physical modeling. Results of numerical simulation show that occurrence of cavitation based on cavitation index equal to 0.25 is not possible along the spillway.

关键词： cavitation Index numerical simulation spillway's flip Bucket CFD Balaroud Dam physical modeling