Electrical and reaction performances of packed‐bed plasma reactors moderated with ferroelectric or dielectric materials

The operational behavior of packed‐bed plasma reactors depends on the dimension, shape, and chemical properties of the pellets used as moderators, but little information exists about the influence of their specific dielectric properties. Herein, we comparatively study the electrical behavior of a pa...

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Bibliographic Details
Published in:Plasma processes and polymers 2021-03, Vol.18 (3), p.n/a
Main Authors: Gómez‐Ramírez, Ana, Álvarez, Rafael, Navascués, Paula, García‐García, Francisco J., Palmero, Alberto, Cotrino, José, González‐Elipe, Agustín R.
Format: Article
Language:English
Subjects:
Aluminum oxide
Ammonia
ammonia synthesis
atmospheric‐pressure plasma
Barium titanates
Chemical properties
Curie temperature
dielectric barrier discharge
Dielectric properties
Ferroelectric materials
Ferroelectricity
ferroelectrics
impedance spectroscopy
Lead zirconate titanates
Moderators
packed‐bed reactors
Pellets
Plasma currents
Reactors
Temperature dependence
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Summary:The operational behavior of packed‐bed plasma reactors depends on the dimension, shape, and chemical properties of the pellets used as moderators, but little information exists about the influence of their specific dielectric properties. Herein, we comparatively study the electrical behavior of a packed‐bed reactor filled with pellets of either dielectric (Al2O3 and glass) or ferroelectric (BaTiO3 and lead zirconate titanate) materials. We found that plasma current was higher for ferroelectrics and presented a nonlineal dependence on voltage. Moreover, for BaTiO3, we found a drastic decrease at around its relatively low Curie temperature. Differences in electrical behavior have a direct effect on the reactor performance, as illustrated for the ammonia synthesis, demonstrating the importance of moderator material dielectric properties and their dependence on temperature. Graphical In this study, we demonstrate that the energy efficiency of packed‐bed reactors depends on the type of moderator material and that plasma reactions driven by ferroelectrics are more efficient than those driven by dielectrics. When using ferroelectrics, operating temperature influences the electrical performance of packed‐bed plasma reactors.
ISSN:1612-8850
1612-8869
DOI:10.1002/ppap.202000193