Shahrokh Shahhosseini | Iran University of Science & Technology (original) (raw)

Papers by Shahrokh Shahhosseini

Vane mist eliminators are among the most effective devices to separate liquid droplets from a gas... more Vane mist eliminators are among the most effective devices to separate liquid droplets from a gas flow. Separation efficiency of these devices is largely dependent on the gas velocity, vane spacing and vane turning angles. In this study the efficiency of this type of mist eliminator has been investigated, using computational fluid dynamic (CFD). In addition, a prediction model of the separation efficiency was obtained based on the response surface methodology. The simulation results showed that there was a conceivable dependency of separation efficiency on the gas velocity and geometrical parameters of vanes. The optimal values of these parameters were determined in order to achieve the maximum separation efficiency.

Separation and Purification Technology, 2016

Applied Thermal Engineering, 2015

Gas-liquid absorption process is one of the important separation processes in which some gas phas... more Gas-liquid absorption process is one of the important separation processes in which some gas phase components diffuse into the liquid phase. Limited models are presented in this area considering absorption process a physical phenomenon without any reaction involvement. Hence due to the importance of the process and the lack of research in this area, the aim of this work was to develop a complete model comprising both absorption and reaction phenomena in the process. Mass transfer enhancement factor is added to the mass balance equations for those components that are transferred via both reaction and absorption. Simulation result of the process model is validated with experimental data obtaining from a pilot packed column absorbing CO 2 and NH 3 with liquid carbon ammonia. The results show a good agreement between model simulation and experimental data.

Vapor-liquid equilibrium (VLE) data play a significant role in the designing and modeling of the ... more Vapor-liquid equilibrium (VLE) data play a significant role in the designing and modeling of the separation processes. In this study, an artificial neural network (ANN) model has been proposed to predict the VLE data of H 2 S-H 2 O-DGA system. Experimental data needed for development of training, testing, and evaluating of the single layer perceptron network were taken from the literature. The applied perceptron neural network contains one hidden layer with ten neurons. Mean absolute error (MAE) of the perceptron network to predict mole ratio of H 2 S in the amine (α H2S ) was 0.0036. The system was also modeled using a reported thermodynamic model. The results of the thermodynamic model were compared with those of ANN model. The comparison indicated that the ANN model yielded a better fit of experimental data with a good accuracy and rapidity as compared to the thermodynamic model. Therefore, the ANN method can be applied as a tool for modeling phase equilibrium of chemical processes with a reasonable accuracy.

In this research, a nonequilibrium stage model has been developed based on the film theory for mo... more In this research, a nonequilibrium stage model has been developed based on the film theory for modeling of H 2 S absorption process. A steady state film model was incorporated into the process model that considers mass transfer between gas and liquid phases in both directions. The method of lines has been used to discretize the set of partial differential equations of the model. The model was validated against the industrial data. The data were obtained from an industrial tray column. The process simulation results are presented in steady and unsteady states. A comparison between the experimental and simulation results showed that the model could reasonably predict the process behavior.

One of the most effective devices to separate liquid from the gas is a vane mist Liquid separatio... more One of the most effective devices to separate liquid from the gas is a vane mist Liquid separation efficiency in this equipment is largely dependent on the gas velocity and geometrical parameters. However, the upper limit of gas throughput is restricted by the re-entrainment of the deposited liquid from the separator surfaces into the gas stream. In this study the effects of different vane angles on the efficiency of this type of mist eliminator have been investigated, using computational fluid dynamics (CFD). Eulerian-Lagrangian approach has been applied. Simulation results showed there is a conceivable dependency of separation efficiency and vane geometry. Keywords: Wave-plate mist eliminators, CFD, Separation efficiency, Eulerian – Lagrangian approach- angle- vane spacing

Chemical Engineering & Technology, 2015

ABSTRACT

Fluid Phase Equilibria, 2009

One of the most effective devices to separate liquid from the gas is a vaned mist eliminator. Liq... more One of the most effective devices to separate liquid from the gas is a vaned mist eliminator. Liquid separation efficiency in this equipment is largely dependent on the gas velocity and geometrical parameters. In this study the effects of different vane geometries on the efficiency of mist eliminator have been investigated, using computational fluid dynamics (CFD). Eulerian-Lagrangian approach has been applied. The performances of the hooked and simple vanes were compared in simulation environment. The simulation results showed there was a conceivable dependency of separation efficiency and vane geometry.

This article appeared in a journal published by Elsevier. The attached copy is furnished to the a... more This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues.

Vane mist eliminators are among the most effective devices to separate liquid droplets from a gas... more Vane mist eliminators are among the most effective devices to separate liquid droplets from a gas flow. Separation efficiency of these devices is largely dependent on the gas velocity, vane spacing and vane turning angles. In this study the efficiency of this type of mist eliminator has been investigated, using computational fluid dynamic (CFD). In addition, a prediction model of the separation efficiency was obtained based on the response surface methodology. The simulation results showed that there was a conceivable dependency of separation efficiency on the gas velocity and geometrical parameters of vanes. The optimal values of these parameters were determined in order to achieve the maximum separation efficiency.

Separation and Purification Technology, 2016

Applied Thermal Engineering, 2015

Gas-liquid absorption process is one of the important separation processes in which some gas phas... more Gas-liquid absorption process is one of the important separation processes in which some gas phase components diffuse into the liquid phase. Limited models are presented in this area considering absorption process a physical phenomenon without any reaction involvement. Hence due to the importance of the process and the lack of research in this area, the aim of this work was to develop a complete model comprising both absorption and reaction phenomena in the process. Mass transfer enhancement factor is added to the mass balance equations for those components that are transferred via both reaction and absorption. Simulation result of the process model is validated with experimental data obtaining from a pilot packed column absorbing CO 2 and NH 3 with liquid carbon ammonia. The results show a good agreement between model simulation and experimental data.

Vapor-liquid equilibrium (VLE) data play a significant role in the designing and modeling of the ... more Vapor-liquid equilibrium (VLE) data play a significant role in the designing and modeling of the separation processes. In this study, an artificial neural network (ANN) model has been proposed to predict the VLE data of H 2 S-H 2 O-DGA system. Experimental data needed for development of training, testing, and evaluating of the single layer perceptron network were taken from the literature. The applied perceptron neural network contains one hidden layer with ten neurons. Mean absolute error (MAE) of the perceptron network to predict mole ratio of H 2 S in the amine (α H2S ) was 0.0036. The system was also modeled using a reported thermodynamic model. The results of the thermodynamic model were compared with those of ANN model. The comparison indicated that the ANN model yielded a better fit of experimental data with a good accuracy and rapidity as compared to the thermodynamic model. Therefore, the ANN method can be applied as a tool for modeling phase equilibrium of chemical processes with a reasonable accuracy.

In this research, a nonequilibrium stage model has been developed based on the film theory for mo... more In this research, a nonequilibrium stage model has been developed based on the film theory for modeling of H 2 S absorption process. A steady state film model was incorporated into the process model that considers mass transfer between gas and liquid phases in both directions. The method of lines has been used to discretize the set of partial differential equations of the model. The model was validated against the industrial data. The data were obtained from an industrial tray column. The process simulation results are presented in steady and unsteady states. A comparison between the experimental and simulation results showed that the model could reasonably predict the process behavior.

One of the most effective devices to separate liquid from the gas is a vane mist Liquid separatio... more One of the most effective devices to separate liquid from the gas is a vane mist Liquid separation efficiency in this equipment is largely dependent on the gas velocity and geometrical parameters. However, the upper limit of gas throughput is restricted by the re-entrainment of the deposited liquid from the separator surfaces into the gas stream. In this study the effects of different vane angles on the efficiency of this type of mist eliminator have been investigated, using computational fluid dynamics (CFD). Eulerian-Lagrangian approach has been applied. Simulation results showed there is a conceivable dependency of separation efficiency and vane geometry. Keywords: Wave-plate mist eliminators, CFD, Separation efficiency, Eulerian – Lagrangian approach- angle- vane spacing

Chemical Engineering & Technology, 2015

ABSTRACT

Fluid Phase Equilibria, 2009

One of the most effective devices to separate liquid from the gas is a vaned mist eliminator. Liq... more One of the most effective devices to separate liquid from the gas is a vaned mist eliminator. Liquid separation efficiency in this equipment is largely dependent on the gas velocity and geometrical parameters. In this study the effects of different vane geometries on the efficiency of mist eliminator have been investigated, using computational fluid dynamics (CFD). Eulerian-Lagrangian approach has been applied. The performances of the hooked and simple vanes were compared in simulation environment. The simulation results showed there was a conceivable dependency of separation efficiency and vane geometry.

This article appeared in a journal published by Elsevier. The attached copy is furnished to the a... more This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues.