In Situ Catalytic Methanation of Real Steelworks Gases

Philipp Wolf-Zoellner, Ana Roza Medved, Markus Lehner, Nina Kieberger and Katharina Rechberger
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Philipp Wolf-Zoellner: Chair of Process Technology and Industrial Environmental Protection, Montanuniversität Leoben, Franz-Josef-Strasse 18, 8700 Leoben, Austria
Ana Roza Medved: Chair of Process Technology and Industrial Environmental Protection, Montanuniversität Leoben, Franz-Josef-Strasse 18, 8700 Leoben, Austria
Markus Lehner: Chair of Process Technology and Industrial Environmental Protection, Montanuniversität Leoben, Franz-Josef-Strasse 18, 8700 Leoben, Austria
Nina Kieberger: Voestalpine Stahl GmbH, Research and Development Ironmaking, Voestalpine Straße 3, 4020 Linz, Austria
Katharina Rechberger: K1-MET GmbH, Stahlstraße 14, 4020 Linz, Austria

Energies, 2021, vol. 14, issue 23, 1-22

Abstract: The by-product gases from the blast furnace and converter of an integrated steelworks highly contribute to today’s global CO 2 emissions. Therefore, the steel industry is working on solutions to utilise these gases as a carbon source for product synthesis in order to reduce the amount of CO 2 that is released into the environment. One possibility is the conversion of CO 2 and CO to synthetic natural gas through methanation. This process is currently extensively researched, as the synthetic natural gas can be directly utilised in the integrated steelworks again, substituting for natural gas. This work addresses the in situ methanation of real steelworks gases in a lab-scaled, three-stage reactor setup, whereby the by-product gases are directly bottled at an integrated steel plant during normal operation, and are not further treated, i.e., by a CO 2 separation step. Therefore, high shares of nitrogen are present in the feed gas for the methanation. Furthermore, due to the catalyst poisons present in the only pre-cleaned steelworks gases, an additional gas-cleaning step based on CuO-coated activated carbon is implemented to prevent an instant catalyst deactivation. Results show that, with the filter included, the steady state methanation of real blast furnace and converter gases can be performed without any noticeable deactivation in the catalyst performance.

Keywords: power-to-gas; catalytic methanation; steelworks; real gases; activated carbon; catalyst poison and degradation (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: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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