Nonoxidative methane coupling in a micro?DBD with enhanced secondary electron emission

The methane dielectric barrier discharge with charge injector parts has the ability to switch selectivity from C2H6 ${{rm{C}}}_{2}{{rm{H}}}_{6}$ to C2H4 ${{rm{C}}}_{2}{{rm{H}}}_{4}$. The change in selectivity is due to enhanced secondary electron emission and thermal dehydrogenation coming by heating at sharp point regions (charge injector). In the reactor with the electrode including charge injector sites, methane conversion is more energy efficient.The conversion of methane into transportable and storable materials is crucial in the petrochemical sector. In this study, a specially constructed AC?driven dielectric barrier discharge (DBD) that has charge injector pyramids on one of the electrodes and runs at ambient temperature and pressure was used to evaluate noncatalytic methane conversion. The obtained result was compared with the traditional flat electrode DBD. It was discovered that the product selectivity in direct nonoxidative methane conversion depended on the discharge conditions. Pyramid electrode plasma sources convert methane up to 50% $ % $ more than flat electrode plasma due to the appearance of more microdischarges. Pyramid electrode plasma generally has a greater production efficiency than flat electrode plasma, while requiring more operational power. The turnkey solutions offered by the sustainable methane coupling method discussed here may be advantageous for the long?term small?scale ethylene exploration scenario.

» Author: Nima Pourali, Pradeep Lamichhane, Volker Hessel, Evgeny V. Rebrov

» Publication Date: 03/08/2023

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This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement Nº 768737


                   




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