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CPOTE2020 logo
6th International Conference on
Contemporary Problems of Thermal Engineering
Online | 21-24 September 2020

Abstract CPOTE2020-1042-A

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Analysis of the integrated system of electrolysis and methanation units for the production of synthetic natural gas (SNG)

Daria KATLA, Silesian University of Technology, Poland
Michał JURCZYK, Silesian University of Technology, Poland
Anna SKOREK-OSIKOWSKA, Silesian University of Technology, Poland
Wojciech UCHMAN, Silesian University of Technology, Poland

Among the energy storage technologies, installations that use hydrogen as an energy carrier, such as Power-to-Gas (PtG) systems are becoming more and more popular. This paper presents an analysis of the power-to-gas installation as an exemplary solution of excess electricity from renewable energy sources storage system. The installation contains an integrated module of the electrolysis process, used for hydrogen production, and a system for synthetic natural gas (SNG) production. An analysis of electrolyzers and methanation units as parts of energy storage installation is performed. Advantages and disadvantages of all systems selected for analysis in the article are presented. The simulation model of analyzed power-to-gas installation, built in the Aspen Plus program, was used for calculations. A thermodynamic analysis of various variants of an energy storage installation and the potential of the use of waste heat is shown. Calculations were made to determine the efficiency of the installation. Calculated values of power-to-SNG efficiency of the analyzed cases remain at the level of 0.49-0.51.

Keywords: Energy storage, Power-to-gas, Methanation, Electrolysis, Synthetic natural gas
Acknowledgment: This work was funded by the National Science Centre within the framework of the research project no. 2017/27/B/ST8/02270 and co-financed by the European Union through the European Social Fund (grant POWR.03.05.00-00-Z305).