Gas Processing Journal

Experimental Measurement and Kinetic Modeling of Ethane Gas Hydrate in the Presence of Sodium Dodecyl Sulfate Surfactant

Maryam Karamoddin; Farshad Varaminian; Maryam Daraee

Volume 1, Issue 2 , April 2013, Pages 1-12

https://doi.org/10.22108/gpj.2013.20164

Abstract

Â Abstract: In this work, the kinetics of ethane hydrate formation has been studied experimentally and a kinetic model based on chemical affinity has been described for ... Read More

Mathematical Method and Thermodynamic Approaches to Design Multi-Component Refrigeration Used in Cryogenic Process Part I: Optimal Operating Conditions

Mostafa Mafi; Majid Amidpour; Mojtaba Nayenian; Gholam Reza Salehi; Bahram Ghorbani

Volume 1, Issue 2 , April 2013, Pages 13-21

https://doi.org/10.22108/gpj.2013.20165

Abstract

Abstract: Minimizing the work consumed in refrigeration system is the most effective measure to reduce the cost of products in sub-ambient chemical processes. The introduction of mixed ... Read More

Investigating the Performance of Amine-Grafted Silica-Base Adsorbents in CO2 Removal from a Natural Gas Stream Using a Diffusion Based Mathematical Model

Foad Aghamiri; Mohammad Reza Talaie; Mohsen Gholami

Volume 1, Issue 2 , April 2013, Pages 22-30

https://doi.org/10.22108/gpj.2013.20167

Abstract

Abstract: Â In this study adiffusion based mathematical model was developed to compare the performance of amine-grafted adsorbents with that of 13X zeolite in a fixed-bed ... Read More

Distillation Column Identification Using Artificial Neural Network

Majid Amidpour; Gholam Reza Salehi; Ali Ghaffari; Hamed Sahraei

Volume 1, Issue 2 , April 2013, Pages 31-40

https://doi.org/10.22108/gpj.2013.20166

Abstract

Â Abstract: In this paper, Artificial Neural Network (ANN) was used for modeling the nonlinear structure of a debutanizer column in a refinery gas process plant. The actual ... Read More

Prediction of Structural Changes in Gas Hydrate for Methane and Ethane Mixture by Using Tangent Plane Distance Minimization

Farshad Varaminian; Hadi Behjati Rad

Volume 1, Issue 2 , April 2013, Pages 41-48

https://doi.org/10.22108/gpj.2013.20168

Abstract

Abstract: Â In this study, the change in the crystalline structure of gas hydrate was predicted for ternary mixture of methane-ethane-water. For this purpose, the tangent ... Read More

Optimization of Distillation Column Operation by Simulated Annealing

Gholam Reza Salehi; Majid Amidpour; Amir Salehi; Mostafa Maleki; Bahram Ghorbani

Volume 1, Issue 2 , April 2013, Pages 49-63

https://doi.org/10.22108/gpj.2013.20169

Abstract

Abstract: In this paper, an exergy analysis approach is proposed for optimal design of distillation column by using simulated annealing algorithm. First, the simulation of a distillation ... Read More Abstract: In this paper, an exergy analysis approach is proposed for optimal design of distillation column by using simulated annealing algorithm. First, the simulation of a distillation column was performed by using the shortcut results and irreversibility in each tray was obtained. The area beneath the exergy loss profile was used as Irreversibility Index in the whole column. Then, First Optimization Algorithm (simulated annealing, SA) was implemented to Grassroots (Number of tray (N) vs. Reflux Ratio (RR)) and Retrofit (NofÂ vs. Feed splitting) cases, respectively. Next, SA was used to find the maximum recovery in a simple column by seven different variables (Feed Temperature, Feed Pressure, Reflux Rate, Number of theoretical stage, Feed Trays (Feed Splitting, three variables)) simultaneously. During the search for maximum recovery, it was tried to find a better Irreversibility Index. In the second part, SA optimization algorithm was used for a complex column with one pump-around and feed splitter to find a better condition, which means to find the best location for pump-around and feed trays in Distillation column. The main objective in SA was to maximize the recovery of the desired component and to find a better minimum Irreversibility Index. This method was implemented in de-ethanizer in the first optimization without using pump-around with seven degrees of freedom, Recovery growth was 5.1% and reduction in irreversibility index was 3%. At the best Irreversibility Index, growth of recovery was about 3.7% and irreversibility index reduction was 25%. In the second optimization with pump-around or eight different variables, in the best condition, Recovery Growth was 6.2% but had a very high Irreversibility Index. At the best irreversibility index, recovery reduction was 17% but reduction in irreversibility index was about 21% comparing with initial point. As a result, it is shown that, regarding recovery and Irreversibility, pump-around shouldnât be used in a column. Without using pump-around, a better condition, considering both factors, can be achieved.

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Volume & Issue: Volume 1, Issue 2, April 2013, Pages 1-63

Experimental Measurement and Kinetic Modeling of Ethane Gas Hydrate in the Presence of Sodium Dodecyl Sulfate Surfactant

Abstract

Mathematical Method and Thermodynamic Approaches to Design Multi-Component Refrigeration Used in Cryogenic Process Part I: Optimal Operating Conditions

Abstract

Investigating the Performance of Amine-Grafted Silica-Base Adsorbents in CO2 Removal from a Natural Gas Stream Using a Diffusion Based Mathematical Model

Abstract

Distillation Column Identification Using Artificial Neural Network

Abstract

Prediction of Structural Changes in Gas Hydrate for Methane and Ethane Mixture by Using Tangent Plane Distance Minimization

Abstract

Optimization of Distillation Column Operation by Simulated Annealing

Abstract