München 2019 – wissenschaftliches Programm
P 18.30: Poster
Donnerstag, 21. März 2019, 16:30–18:30, Foyer Audimax
Investigation of a microwave plasma torch for CO2 gas conversion — •Irina Kistner1, Andreas Schulz1, Matthias Walker1, Günter Tovar1, Frederic Buck2, and Thomas Schiestel2 — 1Institute of Interfacial Process Engineering and Plasma Technology IGVP, University of Stuttgart, Stuttgart, Germany — 2Institute for Interfacial Engineering and Biotechnology IGB, Stuttgart, Germany
Since electricity from renewable sources of energy is subject to fluctuations, energy storage on demand plays a crucial role to create a reliable grid system. The CO2 conversion into syngas or higher hydrocarbons via a plasma assisted gas conversion powered by renewable energy is one promising approach towards energy storage. To make this power to gas concept beneficial over other technologies it is of particular importance to improve the energy and conversion efficiency of this process. On the basis of preliminary tests and technological requirements for a microwave plasma unit for CO2 conversion a modular plasma torch, which enables a "self-ignition" and stable operation of an air and CO2 plasma over a wide range of parameters, has been constructed. The CO2 plasma has been investigated via optical emission spectroscopy, mass spectrometry and IR spectroscopy in order to determine the plasma parameters as well as the energy and conversion efficiency. While improving the energy and conversion efficiency, it is also important to remove the oxygen contained in a CO2 plasma in order to produce syngas. For this purpose a ceramic hollow fiber has been integrated into the system, which separates the oxygen.