The Experts below are selected from a list of 4491 Experts worldwide ranked by ideXlab platform
K Paymooni - One of the best experts on this subject based on the ideXlab platform.
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Enhancement in Triethylene Glycol (TEG) Purity via Hydrocarbon Solvent Injection to a TEG + Water System in a Batch Distillation Column
Energy & Fuels, 2011Co-Authors: K Paymooni, M R Rahimpour, Sona Raeissi, Mohsen Abbasi, Mohammad Saviz BaktashAbstract:Triethylene glycol (TEG) is one of the most important liquid desiccants in the natural gas dehydration industry. In enhanced TEG regeneration processes, liquid hydrocarbons such as toluene and isooctane are added to the stripping column of natural gas dehydration unit in order to boost water volatility and regeneRate TEG to higher purity. In this study, isooctane and toluene were selected as liquid hydrocarbon solvents and the effect of these two solvents on TEG purity and the outlet water concentration from the reboiler of tray column were experimentally investigated and mathematically modeled. The vapor–liquid equilibrium calculations were performed using the NRTL activity coefficient model and ideal gas equation of state to represent the liquid and vapor phases, respectively. Moreover, a comprehensive model was used to determine the liquid Molar Flow Rate on each tray where it changed with time and tray by tray. The impact of various concentrations of solvents and different operating conditions (total ...
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enhancement in triethylene glycol teg purity via hydrocarbon solvent injection to a teg water system in a batch distillation column
Energy & Fuels, 2011Co-Authors: K Paymooni, M R Rahimpour, Sona Raeissi, Mohsen Abbasi, Mohammad Saviz BaktashAbstract:Triethylene glycol (TEG) is one of the most important liquid desiccants in the natural gas dehydration industry. In enhanced TEG regeneration processes, liquid hydrocarbons such as toluene and isooctane are added to the stripping column of natural gas dehydration unit in order to boost water volatility and regeneRate TEG to higher purity. In this study, isooctane and toluene were selected as liquid hydrocarbon solvents and the effect of these two solvents on TEG purity and the outlet water concentration from the reboiler of tray column were experimentally investigated and mathematically modeled. The vapor–liquid equilibrium calculations were performed using the NRTL activity coefficient model and ideal gas equation of state to represent the liquid and vapor phases, respectively. Moreover, a comprehensive model was used to determine the liquid Molar Flow Rate on each tray where it changed with time and tray by tray. The impact of various concentrations of solvents and different operating conditions (total ...
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Differential evolution (DE) stRategy for optimization of hydrogen production and utilization in a thermally coupled membrane reactor for decalin dehydrogenation and Fischer–Tropsch synthesis in GTL technology
International Journal of Hydrogen Energy, 2011Co-Authors: Mohammad Reza Rahimpour, A. Mirvakili, K PaymooniAbstract:Abstract In this study, the operating conditions of a thermally coupled membrane reactor (TCMR) in gas-to-liquid (GTL) technology are optimized via differential evolution (DE) method to maximize the hydrogen mole fraction in the endothermic side as well as the gasoline yield in the exothermic side. TCMR is designed as a double pipe reactor where highly exothermic Fischer–Tropsch synthesis (FTS) reactions in the exothermic side are coupled with decalin dehydrogenation reaction in the endothermic side. The minimum required hydrogen Molar Flow Rate in the recycled stream is optimized to compensate a hydrogen lack at the end of the reactor in the exothermic side. The optimization results show 14.28% increase in the gasoline yield in optimized TCMR compared with conventional tubular reactor (CR). Moreover, 81.49% hydrogen is produced in the endothermic side and about 1% hydrogen is recycled to the exothermic side for utilization in FTS reactions in optimized TCMR.
Mohammad Saviz Baktash - One of the best experts on this subject based on the ideXlab platform.
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Enhancement in Triethylene Glycol (TEG) Purity via Hydrocarbon Solvent Injection to a TEG + Water System in a Batch Distillation Column
Energy & Fuels, 2011Co-Authors: K Paymooni, M R Rahimpour, Sona Raeissi, Mohsen Abbasi, Mohammad Saviz BaktashAbstract:Triethylene glycol (TEG) is one of the most important liquid desiccants in the natural gas dehydration industry. In enhanced TEG regeneration processes, liquid hydrocarbons such as toluene and isooctane are added to the stripping column of natural gas dehydration unit in order to boost water volatility and regeneRate TEG to higher purity. In this study, isooctane and toluene were selected as liquid hydrocarbon solvents and the effect of these two solvents on TEG purity and the outlet water concentration from the reboiler of tray column were experimentally investigated and mathematically modeled. The vapor–liquid equilibrium calculations were performed using the NRTL activity coefficient model and ideal gas equation of state to represent the liquid and vapor phases, respectively. Moreover, a comprehensive model was used to determine the liquid Molar Flow Rate on each tray where it changed with time and tray by tray. The impact of various concentrations of solvents and different operating conditions (total ...
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enhancement in triethylene glycol teg purity via hydrocarbon solvent injection to a teg water system in a batch distillation column
Energy & Fuels, 2011Co-Authors: K Paymooni, M R Rahimpour, Sona Raeissi, Mohsen Abbasi, Mohammad Saviz BaktashAbstract:Triethylene glycol (TEG) is one of the most important liquid desiccants in the natural gas dehydration industry. In enhanced TEG regeneration processes, liquid hydrocarbons such as toluene and isooctane are added to the stripping column of natural gas dehydration unit in order to boost water volatility and regeneRate TEG to higher purity. In this study, isooctane and toluene were selected as liquid hydrocarbon solvents and the effect of these two solvents on TEG purity and the outlet water concentration from the reboiler of tray column were experimentally investigated and mathematically modeled. The vapor–liquid equilibrium calculations were performed using the NRTL activity coefficient model and ideal gas equation of state to represent the liquid and vapor phases, respectively. Moreover, a comprehensive model was used to determine the liquid Molar Flow Rate on each tray where it changed with time and tray by tray. The impact of various concentrations of solvents and different operating conditions (total ...
Mohsen Abbasi - One of the best experts on this subject based on the ideXlab platform.
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Syngas production plus reducing carbon dioxide emission using dry reforming of methane: utilizing low-cost Ni-based catalysts
Oil & Gas Science and Technology - Revue d'IFP Energies nouvelles, 2020Co-Authors: Saeid Abbasi, Mohsen Abbasi, Firouz Tabkhi, Benyamin AkhlaghiAbstract:Applicability of using Dry Reforming of Methane (DRM) using low-cost Ni-based catalysts instead of Conventional Steam Reformers (CSR) to producing syngas simultaneously with reducing the emission of carbon dioxide was studied. In order to achieving this goal, a multi-tubular recuperative thermally coupled reactor which consists of two-concentric-tubes has been designed (Thermally Coupled Tri- and Dry Reformer [TCTDR]). By employing parameters of an industrial scale CSR, two proposed configuration (DRM with fired-furnace and Tri-Reforming of Methane (TRM) instead of fired-furnace (TCTDR)) was simulated. A mathematical heterogeneous model was used to simulate proposed reactors and analyses were carried out based on methane conversion, hydrogen yield and Molar Flow Rate of syngas for each reactor. The results displayed methane conversion of DRM with fired-furnace was 35.29% and 31.44% for Ni–K/CeO2–Al2O3 and Ni/La2O3 catalysts, respectively, in comparison to 26.5% in CSR. Methane conversion in TCTDR reached to 16.98% by Ni/La2O3 catalyst and 88.05% by NiO–Mg/Ce–ZrO2/Al2O3 catalyst in TRM side. Also, it was 15.88% using Ni–K/CeO2–Al2O3 catalyst in the DRM side and 88.36% using NiO–Mg/Ce–ZrO2/Al2O3 catalyst in TRM side of TCTDR. Finally, the effect of different amounts of supplying energy on the performance of DRM with fired-furnace was studied, and positive results in reducing the energy consumption were observed.
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Modeling of synthesis gas and hydrogen production in a thermally coupling of steam and tri-reforming of methane with membranes
Journal of Industrial and Engineering Chemistry, 2014Co-Authors: Hamid Rahnama, Mohsen Abbasi, Farniaei, Mohammad Reza RahimpourAbstract:Abstract In this novel study, tri-reforming process was used as a heat source to proceed steam reforming of methane in a two membrane hydrogen perm-selective Pd/Ag thermally coupled reactor. Results illustRated that H2/CO ratio at the output of steam and tri-reforming sides reached to 6.1 and 0.9, respectively. Additionally the results showed that methane conversion at the output of steam and tri-reforming sides reached to 31% and 96%, respectively. By increasing the feed Flow Rate of tri-reforming side from 28,120 to 140,600 kmol h−1, methane conversion and H2 Molar Flow Rate enhanced 40% and 28.64%, respectively.
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Enhancement in Triethylene Glycol (TEG) Purity via Hydrocarbon Solvent Injection to a TEG + Water System in a Batch Distillation Column
Energy & Fuels, 2011Co-Authors: K Paymooni, M R Rahimpour, Sona Raeissi, Mohsen Abbasi, Mohammad Saviz BaktashAbstract:Triethylene glycol (TEG) is one of the most important liquid desiccants in the natural gas dehydration industry. In enhanced TEG regeneration processes, liquid hydrocarbons such as toluene and isooctane are added to the stripping column of natural gas dehydration unit in order to boost water volatility and regeneRate TEG to higher purity. In this study, isooctane and toluene were selected as liquid hydrocarbon solvents and the effect of these two solvents on TEG purity and the outlet water concentration from the reboiler of tray column were experimentally investigated and mathematically modeled. The vapor–liquid equilibrium calculations were performed using the NRTL activity coefficient model and ideal gas equation of state to represent the liquid and vapor phases, respectively. Moreover, a comprehensive model was used to determine the liquid Molar Flow Rate on each tray where it changed with time and tray by tray. The impact of various concentrations of solvents and different operating conditions (total ...
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enhancement in triethylene glycol teg purity via hydrocarbon solvent injection to a teg water system in a batch distillation column
Energy & Fuels, 2011Co-Authors: K Paymooni, M R Rahimpour, Sona Raeissi, Mohsen Abbasi, Mohammad Saviz BaktashAbstract:Triethylene glycol (TEG) is one of the most important liquid desiccants in the natural gas dehydration industry. In enhanced TEG regeneration processes, liquid hydrocarbons such as toluene and isooctane are added to the stripping column of natural gas dehydration unit in order to boost water volatility and regeneRate TEG to higher purity. In this study, isooctane and toluene were selected as liquid hydrocarbon solvents and the effect of these two solvents on TEG purity and the outlet water concentration from the reboiler of tray column were experimentally investigated and mathematically modeled. The vapor–liquid equilibrium calculations were performed using the NRTL activity coefficient model and ideal gas equation of state to represent the liquid and vapor phases, respectively. Moreover, a comprehensive model was used to determine the liquid Molar Flow Rate on each tray where it changed with time and tray by tray. The impact of various concentrations of solvents and different operating conditions (total ...
M R Rahimpour - One of the best experts on this subject based on the ideXlab platform.
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Dynamic optimal analysis of a novel cascade membrane methanol reactor by using genetic algorithm (GA) method
Energy Systems, 2013Co-Authors: M. Bayat, M R RahimpourAbstract:The potential of a novel cascade membrane methanol reactor (CMMR) in the presence of catalyst deactivation has been investigated by Rahimpour and Bayat [Int J Energy Res 34(15):1356–1371, 2010 ]. In the present paper, this novel configuration is optimized using genetic algorithm stRategy, dynamically. In the first approach, optimum inlet Molar Flow Rate, the inlet pressure of the tube and shell side for both reactors, the temperatures of feed (cooling gas) and cooling satuRated water have been obtained within their practical ranges. In the second approach, a stepwise trajectory has been followed in order to determine the optimal profiles for satuRated water and gas temperatures in three steps during operation. The objective of each optimization case is to maximize the methanol production Rate. Here, genetic algorithms have been used as powerful methods for optimization of complex problems. The optimization results represent 19.67 and 25.63 % enhancement in the methanol production for first and second optimization approaches, respectively.
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Enhancement in Triethylene Glycol (TEG) Purity via Hydrocarbon Solvent Injection to a TEG + Water System in a Batch Distillation Column
Energy & Fuels, 2011Co-Authors: K Paymooni, M R Rahimpour, Sona Raeissi, Mohsen Abbasi, Mohammad Saviz BaktashAbstract:Triethylene glycol (TEG) is one of the most important liquid desiccants in the natural gas dehydration industry. In enhanced TEG regeneration processes, liquid hydrocarbons such as toluene and isooctane are added to the stripping column of natural gas dehydration unit in order to boost water volatility and regeneRate TEG to higher purity. In this study, isooctane and toluene were selected as liquid hydrocarbon solvents and the effect of these two solvents on TEG purity and the outlet water concentration from the reboiler of tray column were experimentally investigated and mathematically modeled. The vapor–liquid equilibrium calculations were performed using the NRTL activity coefficient model and ideal gas equation of state to represent the liquid and vapor phases, respectively. Moreover, a comprehensive model was used to determine the liquid Molar Flow Rate on each tray where it changed with time and tray by tray. The impact of various concentrations of solvents and different operating conditions (total ...
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enhancement in triethylene glycol teg purity via hydrocarbon solvent injection to a teg water system in a batch distillation column
Energy & Fuels, 2011Co-Authors: K Paymooni, M R Rahimpour, Sona Raeissi, Mohsen Abbasi, Mohammad Saviz BaktashAbstract:Triethylene glycol (TEG) is one of the most important liquid desiccants in the natural gas dehydration industry. In enhanced TEG regeneration processes, liquid hydrocarbons such as toluene and isooctane are added to the stripping column of natural gas dehydration unit in order to boost water volatility and regeneRate TEG to higher purity. In this study, isooctane and toluene were selected as liquid hydrocarbon solvents and the effect of these two solvents on TEG purity and the outlet water concentration from the reboiler of tray column were experimentally investigated and mathematically modeled. The vapor–liquid equilibrium calculations were performed using the NRTL activity coefficient model and ideal gas equation of state to represent the liquid and vapor phases, respectively. Moreover, a comprehensive model was used to determine the liquid Molar Flow Rate on each tray where it changed with time and tray by tray. The impact of various concentrations of solvents and different operating conditions (total ...
Sona Raeissi - One of the best experts on this subject based on the ideXlab platform.
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Development of a detailed reaction network for industrial upgrading of heavy reformates to xylenes using differential evolution technique
Journal of the Taiwan Institute of Chemical Engineers, 2015Co-Authors: Nazanin Hamedi, Sona Raeissi, Davood Iranshahi, Mohammad Reza Rahimpour, H. RajaeiAbstract:Abstract In the present study, an accomplished reaction network is developed for commercial conversion of heavy reformates to more valuable xylenes. The proposed kinetic model is based on 18 pseudo-components and 39 related reactions in which 7 different types of reactions are included. Thermodynamic principles are also applied to predict the reversibility of the reactions. To estimate the reaction Rate constants, the absolute deviation between the model results and observed data are minimized applying differential evolution (DE) optimization method. To prove the accuracy of the proposed model, simulation results are compared with the plant data and an acceptable agreement is achieved. Then, the effect of operating conditions on the reactor performance is verified. The results of this work show that increasing the inlet temperature and Molar Flow Rate up to certain values would improve the xylenes production.
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Enhancement in Triethylene Glycol (TEG) Purity via Hydrocarbon Solvent Injection to a TEG + Water System in a Batch Distillation Column
Energy & Fuels, 2011Co-Authors: K Paymooni, M R Rahimpour, Sona Raeissi, Mohsen Abbasi, Mohammad Saviz BaktashAbstract:Triethylene glycol (TEG) is one of the most important liquid desiccants in the natural gas dehydration industry. In enhanced TEG regeneration processes, liquid hydrocarbons such as toluene and isooctane are added to the stripping column of natural gas dehydration unit in order to boost water volatility and regeneRate TEG to higher purity. In this study, isooctane and toluene were selected as liquid hydrocarbon solvents and the effect of these two solvents on TEG purity and the outlet water concentration from the reboiler of tray column were experimentally investigated and mathematically modeled. The vapor–liquid equilibrium calculations were performed using the NRTL activity coefficient model and ideal gas equation of state to represent the liquid and vapor phases, respectively. Moreover, a comprehensive model was used to determine the liquid Molar Flow Rate on each tray where it changed with time and tray by tray. The impact of various concentrations of solvents and different operating conditions (total ...
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enhancement in triethylene glycol teg purity via hydrocarbon solvent injection to a teg water system in a batch distillation column
Energy & Fuels, 2011Co-Authors: K Paymooni, M R Rahimpour, Sona Raeissi, Mohsen Abbasi, Mohammad Saviz BaktashAbstract:Triethylene glycol (TEG) is one of the most important liquid desiccants in the natural gas dehydration industry. In enhanced TEG regeneration processes, liquid hydrocarbons such as toluene and isooctane are added to the stripping column of natural gas dehydration unit in order to boost water volatility and regeneRate TEG to higher purity. In this study, isooctane and toluene were selected as liquid hydrocarbon solvents and the effect of these two solvents on TEG purity and the outlet water concentration from the reboiler of tray column were experimentally investigated and mathematically modeled. The vapor–liquid equilibrium calculations were performed using the NRTL activity coefficient model and ideal gas equation of state to represent the liquid and vapor phases, respectively. Moreover, a comprehensive model was used to determine the liquid Molar Flow Rate on each tray where it changed with time and tray by tray. The impact of various concentrations of solvents and different operating conditions (total ...