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| 1 | Modelling-based Optimisation of the Direct Synthesis of Dimethyl Ether from Syngas in a Commercial Slurry Reactor显示文摘在现在的学习,我们开发了一个多部件为为从 syngas 和 CO2 的 dimethyl 醚(DME ) 的直接合成的一个商业催化泥浆反应堆的模拟和优化的一个维的数学模型,在搅拌机狂暴的政体操作。DME 生产率和公司变换被调节操作条件优化,例如表面的煤气的速度,催化剂集中,在臼齿的煤气的流动率(W/F ) 上的催化剂团, syngas 作文,压力和温度。反应堆建模被完成利用集体平衡,全球运动模型和异构的水动力学。在异构的流动政体,气体被散布进二个水泡阶段:小、大。模拟结果用从飞行员植物获得的数据被验证。发达模型为大规模泥浆反应堆的设计也是适用的。 | Sadegh Papari Mohammad Kazemeini Moslem Fattahi | 2013 | Chinese Journal of Chemical Engineering2013，21，6： | 6 |
| 2 | Modeling-based optimization of a fixed-bed industrial reactor for oxidative dehydrogenation of propane显示文摘An industrial scale propylene production via oxidative dehydrogenation of propane(ODHP)in multi-tubular reactors was modeled.Multi-tubular fixed-bed reactor used for ODHP process,employing 10000 of small diameter tubes immersed in a shell through a proper coolant flows.Herein,a theory-based pseudo-homogeneous model to describe the operation of a fixed bed reactor for the ODHP to correspondence ole fin over V_2O_5/γ-Al_2O_3catalyst was presented.Steady state one dimensional model has been developed to identify the operation parameters and to describe the propane and oxygen conversions,gas process and coolant temperatures,as well as other parameters affecting the reactor performance such as pressure.Furthermore,the applied model showed that a double-bed multitubular reactor with intermediate air injection scheme was superior to a single-bed design due to the increasing of propylene selectivity while operating under lower oxygen partial pressures resulting in propane conversion of about 37.3%.The optimized length of the reactor needed to reach 100%conversion of the oxygen was theoretically determined.For the single-bed reactor the optimized length of 11.96 m including 0.5m of inert section at the entrance region and for the double-bed reactor design the optimized lengths of 5.72m for the first and 7.32 m for the second reactor were calculated.Ultimately,the use of a distributed oxygen feed with limited number of injection points indicated a signi ficant improvement on the reactor performance in terms of propane conversion and propylene selectivity.Besides,this concept could overcome the reactor runaway temperature problem and enabled operations at the wider range of conditions to obtain enhanced propylene production in an industrial scale reactor. | Ali Darvishi Razieh Davand Farhad Khorasheh Moslem Fattahi | 2016 | Chinese Journal of Chemical Engineering2016，24，5： | 5 |
| 3 | Effect of water salinity on oil/brine interfacial behaviour during low salinity waterflooding: A mechanistic study显示文摘In recent years,controlling the salinity and composition of the injected water has become an emerging enhanced oil recovery(EOR)technique,often described as low salinity(LS)waterflooding.This work is done with the intention to contribute to the ongoing discussions about LS waterflooding mechanism(s).For this purpose,a series of different experiments were conducted.At first,the effect of salinity on the interfacial tension(IFT)and the contact angle was evaluated with a crude oil sample.Then to achieve more accurate results in observing oil/water interface,similar IFT experiments were also carried out on a synthetic oil containing asphaltenes.Thereafter,microscopic visualization using glass micromodel was performed on the interface of the synthetic oil sample and brines.Four brine solutions including Sea Water(SW),it's dilutions and formation water(FW)were used for various experiments.Finally,to investigate the presented mechanism by other authors,a series of Environmental Scanning Electron Microscopy(ESEM)analysis on the synthetic oil was carried out to understand better the phase behaviour after contacting both synthetic oil and water phases from the micromodel experiment.Based on the existing mechanism,there exists an optimal concentration beyond which dilution is no longer an effective process. | Peyman Rostami Mohammad Fattahi Mehraban Mohammad Sharifi Morteza Dejam Shahab Ayatollahi | 2019 | Petroleum2019，5，4： | 5 |
| 4 | A novel and efficient multiparty quantum secret sharing scheme using entangled states显示文摘We proposed a novel and efficient multiparty quantum secret sharing scheme using entangled state which in that the number of parties can be arbitrary large.The state which we used,has special properties that make our scheme simple and safe.The operations which are needed to recover secret message,are only exclusive-or addition and complement operation.Moreover it is shown that this scheme is secure against eavesdropping.Also this scheme provides the best quantum bit efficiency compared with some famous quantum secret sharing schemes. | MASSOUD Hadian Dehkordi ELHAM Fattahi | 2012 | Science China(Physics,Mechanics & Astronomy)2012，55，10： | 4 |
| 5 | Estimation of rock uniaxial compressive strength for an Iranian carbonate oil reservoir: Modeling vs. artificial neural network application显示文摘Estimation of rock mechanic parameters is an important issue in reservoir management.Uniaxial compressive strength(UCS)and elastic modulus are the most important factors in determining the rock mechanic parameters in petroleum engineering studies.Accessibility to the parameters in fields such as designing fracture,analyzing of wellbore stability and drilling programming are very useful.The most accurate method to assign the aforementioned parameters is measuring these parameters in a laboratory.Laboratory determination of these parameters is problematic work due to technology issues,lack of laboratory equipment and coring problems in oil and gas wells,so indirect estimation of these parameters is required.Using well log data is the cheapest and most available approach in order to indirectly estimate these parameters.In this investigation,different models including multiple linear regression(MLR)and artificial neural network(ANN)(i.e.,multi linear perceptron(MLP)and radial basis function(RBF))were utilized for prediction of UCS via the three parameters of porosity,density and water saturation.These data were obtained from analysis of sonic,neutron,gamma ray and electric logs.The best results were obtained from a 3-15-1 MLP network which included one hidden layer and 15 neurons from the hidden layer using the trial and error method,and a 3-17-1 RBF which included 17 hidden neurons and a spread ò of 1.6.The core data from one of the carbonate Iranian oil fields(Asmari reservoir)were utilized for training,validation and testing of the networks,and correlation coefficients of 0.68,0.90 and 0.83 were obtained for MLR,MLP and RBF,respectively. | Maryam Hassanvand Siyamak Moradi Moslem Fattahi Ghasem Zargar Mosayyeb Kamari | 2018 | Petroleum Research2018，3，4： | 3 |
| 6 | A dynamic fuzzy interactive approach for DG expansion planning显示文摘 | Majid Esmi Jahromi Mehdi Ehsan Abbas Fattahi Meyabadi | 2012 | International Journal of Electrical Power and Energy Systems2012，，1： | 2 |
| 7 | A three dimensional CFD simulation and optimization of direct DME synthesis in a fixed bed reactor显示文摘In this study, a comprehensive three-dimensional dynamic model was developed for simulating the flow behavior and catalytic coupling reactions for direct synthesis of dimethyl ether(DME) from syngas including CO2 in a fixed bed reactor at commercial scale under both adiabatic and isothermal conditions. For this purpose, a computational fluid dynamic(CFD) simulation was carried out through which the standard k-ε model with 10% turbulence tolerations was implemented. At first, an adiabatic fixed bed reactor was simulated and the obtained results were compared with those of an equivalent commercial slurry reactor. Then the concentration and temperature profiles along the reactor were predicted. Consequently, the optimum temperature, pressure, hydrogen to carbon monoxide ratio in the feedstock and the reactor height under different operation conditions were determined. Finally, the results obtained from this three-dimensional dynamic model under appropriate industrial boundary conditions were compared with those of others available in literature to verify the model. Next, through changing the boundary conditions, the simulation was performed for an isothermal fixed bed reactor. Furthermore, it was revealed that, under isothermal conditions, the performed equilibrium simulations were done for a single phase system. Considering the simultaneous effects of temperature and pressure, the optimum operation conditions for the isothermal and adiabatic fixed bed reactors were investigated. The results of the H2+CO conversions indicated that, under isothermal condition, higher conversion could be achieved, in compared with that under adiabatic conditions. Then, the effects of various operating parameters, including the pressure and temperature, of the reactor on the DME production were examined. Ultimately, the CFD modeling results generated in the present work showed reasonable agreement with previously obtained data available in the literature.EnvironmenEtanl vpiorollnumtioennt aaln dp oiltlsu tpiroenv eanntdio ints aprere mveanjtoiro np raorbel emmasj | Fazel Moradi Mohammad Kazemeini Moslem Fattahi | 2014 | Petroleum Science2014，11，2： | 2 |
| 8 | Mathematical modeling of a slurry reactor for DME direct synthesis from syngas显示文摘In this paper,an axial dispersion mathematical model is developed to simulate a three-phase slurry bubble column reactor for direct synthesis of dimethyl ether(DME) from syngas.This large-scale reactor is modeled using mass and energy balances,catalyst sedimentation andsingle-bubble as well as two-bubbles class flow hydrodynamics.A comparison between the two hydrodynamic models through pilot plantexperimental data from the literature shows that heterogeneous two-bubbles flow model is in better agreement with the experimental data thanhomogeneous single-bubble gas flow model.Also,by investigating the heterogeneous gas flow and axial dispersion model for small bubblesas well as the large bubbles and slurry(i.e.including paraffins and the catalyst) phase,the temperature profile along the reactor is obtained.Acomparison between isothermal and non-isothermal reactors reveals no obvious performance difference between them.The optimum values ofreactor diameter and height were obtained at 7 m and 50 m,respectively.The effects of operating variables on the axial catalyst distribution,DME productivity and CO conversion are also investigated in this research. | Sadegh Papari Mohammad Kazemeini Moslem Fattahi | 2012 | Journal of Natural Gas Chemistry2012，21，2： | 2 |
| 9 | Cotton yarn engineering via fuzzy least squares regression显示文摘 | FATTAHI S TAHERI S M RAVANDI H | 2012 | Fibers and Polymers2012，13，3： | 1 |
| 10 | Determination of chlorophenols in water samples using simultaneous dispersive liquid-liquid microextraction and derivatization followed by gas chromatography-electron-capture detection显示文摘 | FATTAHI N ASSADI Y MILANIHOSSEINI M R ZEINIJAHROMI E | 2007 | J Chromatogr:A2007，1157，12： | 1 |
| 11 | Effect of a Splitter Plate on Flow Over a Semi-Circular Cylinder 显示文摘 | Farhadi M Sedighi K Fattahi E | 2010 | Proc IME G J Aero Eng2010，224，3： | 1 |
| 12 | Histochemical assessment of nitric oxide synthase activity in aortic endothelial cells of streptozotocin-induced diabetic rats显示文摘 | Shafiei M Nobakht M Fattahi M | 2003 | Pathophysiology2003，10，1： | 1 |
| 13 | Numerical simulation of fluid flow aroundtwo rotating side by side circular cylinders by lattice Boltzmann method显示文摘 | Nemati H Sedighi K Farhadi M Pirouz M M Fattahi E | 2010 | International Journal ofComputational Fluid Dynamics2010，24，34： | 1 |
| 14 | Lattice Boltzmann simulation of nanofluidin lid-driven cavity显示文摘 | Nemati H Farhadi M Sedighi K Fattahi E Darzi A A R | 2010 | International Communications in Heat and Mass Transfer2010，37，10： | 1 |
| 15 | Primary Osteo- sarcoma of the Sternum: A case Report and Review of the Literature显示文摘 | Rad MP Fattahi Masoum SH Rad MS | 2014 | Arch Bone Jt Surg2014，2，4： | 1 |
| 16 | Histochemical assessment of nitric oxide synthase activity in aortic endothelial cells of streptozotocin-induced diabetic rats显示文摘 | Shafiei M Nobakht M Fattahi M | 2003 | Pathophysiology2003，10，1： | 1 |
| 17 | A Dynamic Pricing Approach for Returned Products in Integrated Forward/Reverse Logistics Network Design 显示文摘 | Keyvanshokooh E Fattahi M Seyed-Hosseini S M | 2013 | Applied Mathematical Modelling2013，37，10： | 1 |
| 18 | Healing potential of mesenchymal stem cells cultured on a collagen-based scaffold for skin regeneration显示文摘 | Shokrgozar MA Fattahi M Bonakdar S | 2012 | Iran Biomed J2012，16，2： | 1 |
| 19 | Traumaticcarotid-cavernous fistula: pathophysiology and treannent 显示文摘 | Fattahi TT Brandt MT Jenkins WS | 2003 | J Craniofac Surg2003，14，： | 1 |
| 20 | Mathematical modeling andheuristic approaches to flexible job shop scheduling prob-lems显示文摘 | Fattahi P Mehrabad M S Jolai F | 2007 | J Intell Manuf2007，18，： | 1 |
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