absorption unit Simulation of carbon dioxide from ethane gas of Amirkabir Petrochemical and propose an optimal structure to reduce energy consumption

Document Type : Research paper

Authors

1 Department of chemical Engineering, Dezful Branch, Islamic Azad University, Dezful, Iran.

2 Department of Mechanical and Polymer Engineering, Faculty of Engineering, Lorestan University, Khorramabad, Iran

Abstract

In recent years, according to the environmental restrictions for greenhouse gases, several solutions have been presented to reduce the emission of carbon dioxide, including improving the efficiency of the process, recovering and reusing it in operational units. In this paper, an optimal structure to reduce the consumption of steam and cooling water utilities in carbon dioxide absorption unit of Amirkabir petrochemical is presented and the simulation results were compared with the current energy supply structure of the petrochemical. The simulation validation showed that the proposed model has less error than 3%. According to the analysis, the energy consumption of the reboiler has been reduced by 49.49% for the proposed process. In addition, the analyzes indicated that the proposed structure is able to reduce the consumption of cooling energy in the condenser of the desorption tower and cooler of solvent by 52.53% and 76.84%, respectively. Accordingly, economic analysis was performed and it was found that the cost of providing steam and cooling water in the proposed process was 50.88% and 53.59% lower and in total has been reduced by 51.05%. Sensitivity analysis also showed that the expansion pressure of the clean solvent flow is directly related to the reboiler duty and the consumed steam cost. In addition, it was found that increasing the feed temperature of the desorption tower is another parameter that reduces the energy consumption of the boiler and cooling water in the cooler of solvent.

Keywords

References

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Journal of Separation Science and Engineering
Volume 14, Issue 2
April 2023
Pages 39-54

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