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Journal ArticleDOI

Influence of Gap Size and Dielectric Constant of the Packing Material on the Plasma Behaviour in a Packed Bed DBD Reactor: A Fluid Modelling Study

Koen Van Laer, +1 more
- 01 Apr 2017 - 
- Vol. 14, Iss: 14, pp 1600129
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TLDR
In this paper, the influence of the dielectric constant of the packing on the plasma characteristics, for two different gap sizes, was investigated by means of fluid modelling, and it was shown that the enhanced electric field results in a higher electron temperature, but also lower electron density.
Abstract
A packed bed dielectric barrier discharge (DBD) was studied by means of fluid modelling, to investigate the influence of the dielectric constant of the packing on the plasma characteristics, for two different gap sizes. The electric field strength and electron temperature are much more enhanced in a microgap reactor than in a mm-gap reactor, leading to more current peaks per half-cycle, but also to non-quasineutral plasma. Increasing the dielectric constant enhances the electric field further, but only up to a certain value of dielectric constant, being 9 for a microgap and 100 for a mm-gap reactor. The enhanced electric field results in a higher electron temperature, but also lower electron density. This last one strongly affects the reaction rate.

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Citations
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A Review of Non-Thermal Plasma Technology: A novel solution for CO2 conversion and utilization

TL;DR: A comprehensive review of recent, encouraging research achievements in CO2 conversion using NTP is provided in this paper, where the authors discuss the recent progress in different NTP sources in relation to product selectivity, conversion, and energy efficiency.
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The application of dielectric barrier discharge non-thermal plasma in VOCs abatement: A review

TL;DR: In this paper, the history and current status of dielectric barrier discharge (DBD) non-thermal plasma (NTP) for volatile organic compounds (VOCs) abatement are described.
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Recent developments in non-thermal catalytic DBD plasma reactor for dry reforming of methane

TL;DR: In this paper, the current status and developments in DBD reactor configuration based on reactor geometry, such as the electrode morphology, discharge gap (Dgap), discharge volume (VD), and material packing to maximize the productivity of DRM are specifically investigated.
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Plasma-driven catalysis: green ammonia synthesis with intermittent electricity

TL;DR: A review of the literature on plasma-driven ammonia synthesis is presented in this article, where the authors distinguish between mechanisms for ammonia synthesis in the presence of a plasma, with and without a catalyst, for different plasma conditions.
References
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Solving the Boltzmann equation to obtain electron transport coefficients and rate coefficients for fluid models

TL;DR: The BOLSIG+ solver as mentioned in this paper provides steady-state solutions of the BE for electrons in a uniform electric field, using the classical two-term expansion, and is able to account for different growth models, quasi-stationary and oscillating fields, electron-neutral collisions and electron-electron collisions.
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Plasma Catalysis: Synergistic Effects at the Nanoscale

TL;DR: This Review critically examines the catalytic mechanisms relevant to each specific application of plasma catalysis, including CO2 conversion, hydrocarbon reforming, synthesis of nanomaterials, ammonia production, and abatement of toxic waste gases.
Journal ArticleDOI

Review of plasma catalysis on hydrocarbon reforming for hydrogen production-Interaction, integration, and prospects

TL;DR: In this paper, the authors reviewed the development of the application of plasma catalysis, the combination of plasma and thermal catalysis on hydrocarbon reforming for H 2 generation, and showed that this novel technique results in a synergistic effect.
Journal ArticleDOI

Plasma-assisted conversion of CO2 in a dielectric barrier discharge reactor: understanding the effect of packing materials

TL;DR: In this article, a cylindrical dielectric barrier discharge (DBD) was developed for the conversion of undiluted CO2 into CO and O2 at atmospheric pressure and low temperatures.
Journal ArticleDOI

Understanding plasma catalysis through modelling and simulation—a review

TL;DR: An overview of the modelling efforts that have been developed already, on both the atomistic and the macroscale, and the data that can be obtained with these models are identified to illustrate how modelling and simulation may contribute to this field.
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