Untersuchung des Systems Eisen-Silizium-Mangan als Flüssigmetallkatalysator für die Methanpyrolyse

Translated title of the contribution: Investigation of the iron-silicon-manganese system as a liquid metal catalyst for methane pyrolysis

Research output: ThesisMaster's Thesis

Abstract

To mitigate climate change, a transition to alternative energy carriers is necessary. Hydrogen offers a promising replacement for fossil fuels. However, today's production predominantly occurs through emission-intensive processes, such as steam methane reforming. Methane pyrolysis is an alternative method that, by decomposing CH4 in the absence of oxygen, produces hydrogen and carbon. This endothermic reaction preferably occurs at higher temperatures and can be accelerated with the use of a catalyst. The application of a liquid metal reactor offers several advantages compared to solid-state variants. However, this process is still in an early stage of development and is not ready for industrial implementation without further research. This thesis examines the use of iron-silicon-manganese alloys as a liquid catalyst in methane pyrolysis. Two reactors with a melt bath height of 70 mm and 300 mm are investigated at temperatures ranging from 1170¿1250 °C. The evaluation considers methane conversion and hydrogen yield of the experiments as well as the activation energy of the reaction. The results show a significant positive effect of higher silicon contents. No definitive statement can be made regarding manganese based on the available data. Furthermore, the catalytic effect is not limited due to deactivation during a maximum experimental duration of 260 minutes. An examination of the carbon shows that metal discharge occurs, resulting in the product being obtained in an impure form. However, there are numerous factors to consider in methane pyrolysis, necessitating further research.
Translated title of the contributionInvestigation of the iron-silicon-manganese system as a liquid metal catalyst for methane pyrolysis
Original languageGerman
Awarding Institution
  • Montanuniversität
Supervisors/Advisors
  • Antrekowitsch, Helmut, Supervisor (internal)
  • Scheiblehner, David, Co-Supervisor (internal)
Award date28 Jun 2024
Publication statusPublished - 2024

Bibliographical note

no embargo

Keywords

  • Methane pyrolysis
  • Hydrogen
  • Carbon
  • Liquid metal catalyst
  • Catalyst
  • Reaction kinetics
  • Methane
  • Iron
  • Silicon
  • Manganese
  • Pig iron
  • Pyrolysis

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