Techno-Economic Analysis of Carbon Dioxide Separation for an Innovative Energy Concept towards Low-Emission Glass Melting

Sebastian Gärtner (), Thomas Marx-Schubach, Matthias Gaderer, Gerhard Schmitz and Michael Sterner
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Sebastian Gärtner: Research Center on Energy Transmission and Energy Storage (FENES), Technical University of Applied Sciences (OTH) Regensburg, Seybothstrasse 2, 93053 Regensburg, Germany
Thomas Marx-Schubach: XRG Simulation GmbH, Harburger Schlossstrasse 6-12, 21079 Hamburg, Germany
Matthias Gaderer: Chair of Regenerative Energy Systems (RES), Campus Straubing for Biotechnology and Sustainability, Technical University Munich, Schulgasse 16, 94315 Straubing, Germany
Gerhard Schmitz: Institute of Engineering Thermodynamics, Hamburg University of Technology, Denickestrasse 15, 21073 Hamburg, Germany
Michael Sterner: Research Center on Energy Transmission and Energy Storage (FENES), Technical University of Applied Sciences (OTH) Regensburg, Seybothstrasse 2, 93053 Regensburg, Germany

Energies, 2023, vol. 16, issue 5, 1-25

Abstract: The currently still high fossil energy demand is forcing the glass industry to search for innovative approaches for the reduction in CO 2 emissions and the integration of renewable energy sources. In this paper, a novel power-to-methane concept is presented and discussed for this purpose. A special focus is on methods for the required CO 2 capture from typical flue gases in the glass industry, which have hardly been explored to date. To close this research gap, process simulation models are developed to investigate post-combustion CO 2 capture by absorption processes, followed by a techno-economic evaluation. Due to reduced flue gas volume, the designed CO 2 capture plant is found to be much smaller (40 m 3 absorber column volume) than absorption-based CO 2 separation processes for power plants (12,560 m 3 absorber column volume). As there are many options for waste heat utilization in the glass industry, the waste heat required for CO 2 desorption can be generated in a particularly efficient and cost-effective way. The resulting CO 2 separation costs range between 41 and 42 EUR/t CO 2 , depending on waste heat utilization for desorption. These costs are below the values of 50–65 EUR/t CO 2 for comparable industrial applications. Despite these promising economic results, there are still some technical restrictions in terms of solvent degradation due to the high oxygen content in flue gas compositions. The results of this study point towards parametric studies for approaching these issues, such as the use of secondary and tertiary amines as solvents, or the optimization of operating conditions such as stripper pressure for further cost reductions potential.

Keywords: power-to-gas; methanation; oxyfuel; glass industry; CO 2 -separation; economic evaluation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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