Plasma catalysis: Study of packing materials on CO2 reforming in a DBD reactor
18 June 2019
Campus Drie Eiken, O.01 - Universiteitsplein 1 - 2610 Antwerpen-Wilrijk (route: UAntwerpen, Campus Drie Eiken
Organization / co-organization:
Department of Chemistry
Annemie Bogaerts & Vera Meynen
Phd defence Inne Michielsen - Faculty of Science, Department of Chemistry
This thesis investigated dry reforming of CH4 (DRM) in a packed bed DBD reactor. The objective of this research was to improve the current understanding of plasma-catalytic interactions for CO2 splitting and DRM.
Chapter 1 not only explains why there is a need for the conversion of these greenhouse gases, but also describes the current state of the art in CO2 splitting and DRM. It indicates the need for an energy-efficient technology that selectively produces value-added chemicals, and illustrates how plasma-catalysis can be a suitable technique.
Chapter 2 further specifies the reactor configuration, analytics and materials used in this work, for plasma catalysis. All experiments had a detailed analysis of the plasma characteristics and the catalytic materials, and the results of these are shown in the Appendix.
Chapter 3 focusses on the splitting of CO2, using four different spherical packing materials in three different sizes, as well as glass wool and quartz wool. The effect of packing material and size and gap size was studied, as well as the effect of glass wool, quartz wool and the interactions between the packing and the dielectric barrier material.
Chapter 4 reveals the conversion of CO2 and CH4 for five different spherical packing materials in three different bead sizes. A detailed comparison is made with Chapter 3, and the influence of the applied packing materials on the product fractions is discussed.
Chapter 5 investigates the peculiar case of BaTiO3, performing best for pure CO2 splitting (Chapter 3) and worst in DRM (Chapter 4). This is achieved by comparing a BaTiO3 packing with different bead sizes, in different gap sizes, at multiple residence times. Moreover, a comparison is made between the conversion for CO2 and CH4 in DRM and as individual gas components.
Finally, Chapter 6 gives a general conclusion.