The Experts below are selected from a list of 6141 Experts worldwide ranked by ideXlab platform
Alireza Bahadori - One of the best experts on this subject based on the ideXlab platform.
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Prediction of Hydrate equilibrium conditions using k-nearest neighbor algorithm to CO2 capture
Petroleum Science and Technology, 2017Co-Authors: Javad Sayyad Amin, Alireza Bahadori, Behnam Hosseini Nia, Saeed Rafiee, Nahid KheilnezhadAbstract:ABSTRACTGas or clathrate Hydrates are an important issue when they form in the oil and gas pipelines. Since the determination of the Hydrate Formation Temperature and pressure is very difficult experimentally for every gas system and it is impossible in terms of cost and time approximately, mathematical models can be useful tools to overcome these difficulties. In this study, k-nearest neighbor model was used to predict the equilibrium conditions of Hydrate Formation in absorption and separation of carbon dioxide from flue gas mixture, containing carbon dioxide and nitrogen. At the training phase, Temperature and composition data of nitrogen and carbon dioxide in the flue gas mixture at equilibrium conditions and the equilibrium pressures of Hydrate Formation were used as input and output, respectively. The error percentage less than 0.38% indicates the high accuracy of the proposed model. In this study, 80%, 85%, and 90% of the training data are examined for three numbers of nearest. For three numbers of...
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Phase equilibrium modelling of natural gas Hydrate Formation conditions using LSSVM approach
Petroleum Science and Technology, 2016Co-Authors: Alireza Baghban, Alireza Bahadori, Saman Namvarrechi, Le Thi Kim Phung, Moonyong Lee, Tomoaki KashiwaoAbstract:ABSTRACTThe Formation of gas Hydrates in industries and chemical plants, especially in natural gas production and transmission, is an important factor that can lead to operational and economic risks. Hence, if the Hydrate conditions are well addressed, it is possible overcome Hydrate-related problems. To that end, evolving an accurate and simple-to-apply approach for estimating gas Hydrate Formation is vitally important. In this contribution, the least square support vector machine (LSSVM) approach has been developed based on Katz chart data points to estimate natural gas Hydrate Formation Temperature as function of the pressure and gas gravity. In addition, a genetic algorithm has been employed to optimize hyper parameters of the LSSVM. Moreover, the present model has been compared with five popular correlations and was concluded that the LSSVM approach has fewer deviations than these correlations so to estimate Hydrate Formation Temperature. According to statistical analyses, the obtained values of MSE ...
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Prediction of Hydrate Formation Temperature based on an improved empirical correlation by imperialist competitive algorithm
Petroleum Science and Technology, 2016Co-Authors: Javad Sayyad Amin, Samira Keshavarz Babaee Nejad, Mehdi Veiskarami, Alireza BahadoriAbstract:ABSTRACTFormation of gas Hydrates is an important problem in production and transmission of natural gases. Hence, it is a particular interest and also vital to estimate the Hydrate Formation conditions. To do so, the Katz gas gravity method can be used as one of the simplest techniques. Numerous correlations have been presented so far, among which one of the most popular one with very good accuracy is the so called Ghiasi model. In this study, the imperialist competitive algorithm is applied to improve the Ghiasi correlation by using the Katz data. Error analysis of the results demonstrated that the improved equation had the highest precision in comparison with the Ghiasi correlation and also the other models reported by researchers.
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Evolving a robust modeling tool for prediction of natural gas Hydrate Formation conditions
Journal of Unconventional Oil and Gas Resources, 2015Co-Authors: Ebrahim Soroush, Mohammad Mesbah, Moonyong Lee, Tomoaki Kashiwao, Amin Shokrollahi, Jake Rozyn, Alireza BahadoriAbstract:Abstract Natural gas is a very important energy source. The production, processing and transportation of natural gas can be affected significantly by gas Hydrates. Pipeline blockages due to Hydrate Formation causes operational problems and a decrease in production performance. This paper presents an improved artificial neural network (ANN) method to predict the Hydrate Formation Temperature (HFT) for a wide range of gas mixtures. A new approach was used to define the variables for Formation of a Hydrate structure according to each species presented in natural gas mixtures. This approach resulted in a strong network with a precise prediction, especially in the case of sour gases. This study also presents a detailed comparison of the results predicted by this ANN model with those of other correlations and thermodynamics-based models for an estimation of the HFT. The results showed that the proposed ANN model predictions are in much better agreement with the experimental data than the existing models and correlations. Finally, outlier detection was performed on the entire data set to identify any defective measurements of the experimental data.
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Predicting Natural Gas Hydrate Formation Temperature Using Levenberg-Marquardt Algorithm
Petroleum Science and Technology, 2015Co-Authors: J. Sayyad Amin, Alireza Bahadori, E Mohamadi, B Hoseini NiaAbstract:In this study, two new correlations are proposed to predict the natural gas Hydrate Formation Temperature as a function of pressure and specific gravity. The first correlation has been developed using Vandermonde matrix and the coefficients of the second correlation have been obtained by Levenberg-Marquardt algorithm. The error analysis shows the good performance of the two new proposed correlations to predict Hydrate Formation Temperature compared to correlations presented earlier and also the experimental values.
Lesley A James - One of the best experts on this subject based on the ideXlab platform.
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evaluation of gas Hydrate Formation Temperature for gas water salt alcohol systems utilization of extended uniquac model and pc saft equation of state
Industrial & Engineering Chemistry Research, 2018Co-Authors: Javad Kondori, Sohrab Zendehboudi, Lesley A JamesAbstract:Naturally occurring gas Hydrates are of great importance as a strategic energy source. Hydrates affect coastal sediment stability, global climate change, and ocean carbon cycling. It is vital to understand the thermodynamic conditions of gas Hydrates to control/manage and inhibit Hydrate Formation. A variety of equations of state (EOSs) have been utilized to model the thermodynamic behaviors of gas Hydrates. In this study, the perturbed chain statistical association fluid theory (PC-SAFT) equation of state combined with van der Waals and Platteuw model is employed to determine the clathrate Hydrate Formation Temperature of pure gases (e.g., methane, ethane, propane, isobutane, carbon dioxide, and hydrogen sulfide) and binary and ternary systems of Hydrate gases. In addition, the gas Hydrate Formation conditions are investigated where methanol, ethanol, glycerol, NaCl, KCl, CaCl2, and MgCl2 as inhibitors are present. The UNIQUAC model is utilized in this work to obtain the Hydrate Formation conditions in s...
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Evaluation of Gas Hydrate Formation Temperature for Gas/Water/Salt/Alcohol Systems: Utilization of Extended UNIQUAC Model and PC-SAFT Equation of State
Industrial & Engineering Chemistry Research, 2018Co-Authors: Javad Kondori, Sohrab Zendehboudi, Lesley A JamesAbstract:Naturally occurring gas Hydrates are of great importance as a strategic energy source. Hydrates affect coastal sediment stability, global climate change, and ocean carbon cycling. It is vital to understand the thermodynamic conditions of gas Hydrates to control/manage and inhibit Hydrate Formation. A variety of equations of state (EOSs) have been utilized to model the thermodynamic behaviors of gas Hydrates. In this study, the perturbed chain statistical association fluid theory (PC-SAFT) equation of state combined with van der Waals and Platteuw model is employed to determine the clathrate Hydrate Formation Temperature of pure gases (e.g., methane, ethane, propane, isobutane, carbon dioxide, and hydrogen sulfide) and binary and ternary systems of Hydrate gases. In addition, the gas Hydrate Formation conditions are investigated where methanol, ethanol, glycerol, NaCl, KCl, CaCl2, and MgCl2 as inhibitors are present. The UNIQUAC model is utilized in this work to obtain the Hydrate Formation conditions in s...
Sohrab Zendehboudi - One of the best experts on this subject based on the ideXlab platform.
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Evaluation of Gas Hydrate Formation Temperature for Gas/Water/Salt/Alcohol Systems: Utilization of Extended UNIQUAC Model and PC-SAFT Equation of State
Industrial & Engineering Chemistry Research, 2018Co-Authors: Javad Kondori, Sohrab Zendehboudi, Lesley A JamesAbstract:Naturally occurring gas Hydrates are of great importance as a strategic energy source. Hydrates affect coastal sediment stability, global climate change, and ocean carbon cycling. It is vital to understand the thermodynamic conditions of gas Hydrates to control/manage and inhibit Hydrate Formation. A variety of equations of state (EOSs) have been utilized to model the thermodynamic behaviors of gas Hydrates. In this study, the perturbed chain statistical association fluid theory (PC-SAFT) equation of state combined with van der Waals and Platteuw model is employed to determine the clathrate Hydrate Formation Temperature of pure gases (e.g., methane, ethane, propane, isobutane, carbon dioxide, and hydrogen sulfide) and binary and ternary systems of Hydrate gases. In addition, the gas Hydrate Formation conditions are investigated where methanol, ethanol, glycerol, NaCl, KCl, CaCl2, and MgCl2 as inhibitors are present. The UNIQUAC model is utilized in this work to obtain the Hydrate Formation conditions in s...
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evaluation of gas Hydrate Formation Temperature for gas water salt alcohol systems utilization of extended uniquac model and pc saft equation of state
Industrial & Engineering Chemistry Research, 2018Co-Authors: Javad Kondori, Sohrab Zendehboudi, Lesley A JamesAbstract:Naturally occurring gas Hydrates are of great importance as a strategic energy source. Hydrates affect coastal sediment stability, global climate change, and ocean carbon cycling. It is vital to understand the thermodynamic conditions of gas Hydrates to control/manage and inhibit Hydrate Formation. A variety of equations of state (EOSs) have been utilized to model the thermodynamic behaviors of gas Hydrates. In this study, the perturbed chain statistical association fluid theory (PC-SAFT) equation of state combined with van der Waals and Platteuw model is employed to determine the clathrate Hydrate Formation Temperature of pure gases (e.g., methane, ethane, propane, isobutane, carbon dioxide, and hydrogen sulfide) and binary and ternary systems of Hydrate gases. In addition, the gas Hydrate Formation conditions are investigated where methanol, ethanol, glycerol, NaCl, KCl, CaCl2, and MgCl2 as inhibitors are present. The UNIQUAC model is utilized in this work to obtain the Hydrate Formation conditions in s...
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new tools predict monoethylene glycol injection rate for natural gas Hydrate inhibition
Journal of Loss Prevention in The Process Industries, 2015Co-Authors: Arash Kamari, Amir H. Mohammadi, Alireza Bahadori, Alireza Bahadori, Sohrab ZendehboudiAbstract:Abstract In the oil and gas production operations, Hydrates deposition leads to serious problems including over pressuring, irreparable damages to production equipment, pipeline blockage, and finally resulting in production facilities shut down and even human life and the environment dangers. Hence, it is of great importance to forecast the Hydrate Formation conditions in order to overcome problems associated with deposition of Hydrate. In this article, an effective, mathematical and predictive strategy, known as the least squares support vector machine, is employed to determine the Hydrate forming conditions of sweet natural gases as well as the monoethylene glycol (MEG) flow-rate and desired depression of the gas Hydrate Formation Temperature (DHFT). The outcome of this study reveals that the developed technique offers high predictive potential in precise estimation of this important characteristic in the gas industry. Beside the accuracy and reliability, the proposed model includes lower number of coefficients in contrast with conventional correlations/methods, implying an interesting feature to be added to the modeling simulation software packages in gas engineering.
Mohammad M Ghiasi - One of the best experts on this subject based on the ideXlab platform.
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initial estimation of Hydrate Formation Temperature of sweet natural gases based on new empirical correlation
Journal of Natural Gas Chemistry, 2012Co-Authors: Mohammad M GhiasiAbstract:Abstract Production, processing and transportation of natural gases can be significantly affected by clathrate Hydrates. Knowing the gas analysis is crucial to predict the right conditions for Hydrate Formation. Nevertheless, Katz gas gravity method can be used for initial estimation of Hydrate Formation Temperature (HFT) under the circumstances of indeterminate gas composition. So far several correlations have been proposed for gas gravity method, in which the most accurate and reliable one has belonged to Bahadori and Vuthaluru. The main objective of this study is to present a simple and yet accurate correlation for fast prediction of sweet natural gases HFT based on the fit to Katz gravity chart. By reviewing the error analysis results, one can discover that the new proposed correlation has the best estimation capability among the widely accepted existing correlations within the investigated range.
Javad Kondori - One of the best experts on this subject based on the ideXlab platform.
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evaluation of gas Hydrate Formation Temperature for gas water salt alcohol systems utilization of extended uniquac model and pc saft equation of state
Industrial & Engineering Chemistry Research, 2018Co-Authors: Javad Kondori, Sohrab Zendehboudi, Lesley A JamesAbstract:Naturally occurring gas Hydrates are of great importance as a strategic energy source. Hydrates affect coastal sediment stability, global climate change, and ocean carbon cycling. It is vital to understand the thermodynamic conditions of gas Hydrates to control/manage and inhibit Hydrate Formation. A variety of equations of state (EOSs) have been utilized to model the thermodynamic behaviors of gas Hydrates. In this study, the perturbed chain statistical association fluid theory (PC-SAFT) equation of state combined with van der Waals and Platteuw model is employed to determine the clathrate Hydrate Formation Temperature of pure gases (e.g., methane, ethane, propane, isobutane, carbon dioxide, and hydrogen sulfide) and binary and ternary systems of Hydrate gases. In addition, the gas Hydrate Formation conditions are investigated where methanol, ethanol, glycerol, NaCl, KCl, CaCl2, and MgCl2 as inhibitors are present. The UNIQUAC model is utilized in this work to obtain the Hydrate Formation conditions in s...
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Evaluation of Gas Hydrate Formation Temperature for Gas/Water/Salt/Alcohol Systems: Utilization of Extended UNIQUAC Model and PC-SAFT Equation of State
Industrial & Engineering Chemistry Research, 2018Co-Authors: Javad Kondori, Sohrab Zendehboudi, Lesley A JamesAbstract:Naturally occurring gas Hydrates are of great importance as a strategic energy source. Hydrates affect coastal sediment stability, global climate change, and ocean carbon cycling. It is vital to understand the thermodynamic conditions of gas Hydrates to control/manage and inhibit Hydrate Formation. A variety of equations of state (EOSs) have been utilized to model the thermodynamic behaviors of gas Hydrates. In this study, the perturbed chain statistical association fluid theory (PC-SAFT) equation of state combined with van der Waals and Platteuw model is employed to determine the clathrate Hydrate Formation Temperature of pure gases (e.g., methane, ethane, propane, isobutane, carbon dioxide, and hydrogen sulfide) and binary and ternary systems of Hydrate gases. In addition, the gas Hydrate Formation conditions are investigated where methanol, ethanol, glycerol, NaCl, KCl, CaCl2, and MgCl2 as inhibitors are present. The UNIQUAC model is utilized in this work to obtain the Hydrate Formation conditions in s...
