Reduction Characteristics of Carbon Dioxide Using a Plasmatron

Kim, Seong Cheon; Lim, Mun Sup; Chun, Young Nam

doi:10.1007/s11090-013-9499-8

Cited by 44 publications

(22 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…is the electrical conductance over the entire arc discharge channel, with σ being the plasma electric conductivity, calculated with equation (11), and r max is the maximum radius of the arc discharge channel (see figure 1). Note that this electric field is used only for the Joule heating calculation in equation ( 10) and it does not contribute to the transport of particles and energy, for which the ambipolar electric field in equation ( 9) is used.…”

Section: The Electron Energy Density Flux G Ementioning

confidence: 99%

CO₂conversion in a gliding arc plasma: 1D cylindrical discharge model

Wang

Berthelot

Kolev

et al. 2016

Plasma Sources Sci. Technol.

View full text Add to dashboard Cite

CO 2 conversion by a gliding arc plasma is gaining increasing interest, but the underlying mechanisms for an energy-efficient process are still far from understood. Indeed, the chemical complexity of the non-equilibrium plasma poses a challenge for plasma modeling due to the huge computational load. In this paper, a one-dimensional (1D) gliding arc model is developed in a cylindrical frame, with a detailed non-equilibrium CO 2 plasma chemistry set, including the CO 2 vibrational kinetics up to the dissociation limit. The model solves a set of timedependent continuity equations based on the chemical reactions, as well as the electron energy balance equation, and it assumes quasi-neutrality in the plasma. The loss of plasma species and heat due to convection by the transverse gas flow is accounted for by using a characteristic frequency of convective cooling, which depends on the gliding arc radius, the relative velocity of the gas flow with respect to the arc and on the arc elongation rate. The calculated values for plasma density and plasma temperature within this work are comparable with experimental data on gliding arc plasma reactors in the literature. Our calculation results indicate that excitation to the vibrational levels promotes efficient dissociation in the gliding arc, and this is consistent with experimental investigations of the gliding arc based CO 2 conversion in the literature. Additionally, the dissociation of CO 2 through collisions with O atoms has the largest contribution to CO 2 splitting under the conditions studied. In addition to the above results, we also demonstrate that lumping the CO 2 vibrational states can bring a significant reduction of the computational load. The latter opens up the way for 2D or 3D models with an accurate description of the CO 2 vibrational kinetics.

show abstract

Section: The Electron Energy Density Flux G Ementioning

confidence: 99%

CO₂conversion in a gliding arc plasma: 1D cylindrical discharge model

Wang

Berthelot

Kolev

et al. 2016

Plasma Sources Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Gliding arc plasmas are among the most effective and promising plasmas for gas conversion because they offer benefits of both thermal and non‐thermal discharges. They are typically considered as “warm” discharges, and vibrational excitation of the molecules is seen as the most efficient way to assist the conversion or synthesis .…”

Section: Introductionmentioning

confidence: 99%

Nitrogen Fixation by Gliding Arc Plasma: Better Insight by Chemical Kinetics Modelling

et al. 2017

View full text Add to dashboard Cite

The conversion of atmospheric nitrogen into valuable compounds, that is, so-called nitrogen fixation, is gaining increased interest, owing to the essential role in the nitrogen cycle of the biosphere. Plasma technology, and more specifically gliding arc plasma, has great potential in this area, but little is known about the underlying mechanisms. Therefore, we developed a detailed chemical kinetics model for a pulsed-power gliding-arc reactor operating at atmospheric pressure for nitrogen oxide synthesis. Experiments are performed to validate the model and reasonable agreement is reached between the calculated and measured NO and NO yields and the corresponding energy efficiency for NO formation for different N /O ratios, indicating that the model can provide a realistic picture of the plasma chemistry. Therefore, we can use the model to investigate the reaction pathways for the formation and loss of NO . The results indicate that vibrational excitation of N in the gliding arc contributes significantly to activating the N molecules, and leads to an energy efficient way of NO production, compared to the thermal process. Based on the underlying chemistry, the model allows us to propose solutions on how to further improve the NO formation by gliding arc technology. Although the energy efficiency of the gliding-arc-based nitrogen fixation process at the present stage is not comparable to the world-scale Haber-Bosch process, we believe our study helps us to come up with more realistic scenarios of entering a cutting-edge innovation in new business cases for the decentralised production of fertilisers for agriculture, in which low-temperature plasma technology might play an important role.

show abstract

“…The dissociation of CO 2 or CH 4 in NTP reactors mainly targets the generation of gaseous products (CO, H 2 , or a mixture of both). Nonetheless, the concept of co‐generation of carbonaceous added‐value solid products in discharges of greenhouse gases was also explored for thermal plasmas as well as NTP setups . In the majority of these studies the deposition of carbon was associated with the decomposition of the initially present or formed methane (or higher hydrocarbons) according to the endothermic reaction (reaction 2):

{normalC}_{n} {normalH}_{m} \to n {normalC}_{s} + \frac{m}{2} {normalH}_{2}

…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Micro- and Nanomaterials in CO₂and CO Dielectric Barrier Discharges

Belov

Vanneste²,

Aghaee

et al. 2016

Plasma Process. Polym.

View full text Add to dashboard Cite

Dielectric Barrier Discharges operating in CO and CO 2 form solid products at atmospheric pressure. The main differences between both plasmas and their deposits were analyzed, at similar energy input. GC measurements revealed a mixture of CO 2 , CO, and O 2 in the CO 2 DBD exhaust, while no O 2 was found in the CO plasma. A coating of nanoparticles composed of Fe, O, and C was produced by the CO 2 discharge, whereas, a microscopic dendrite-like carbon structure was formed in the CO plasma. Fe 3 O 4 and Fe crystalline phases were found in the CO 2 sample. The CO deposition was characterized as an amorphous structure, close to polymeric CO (p-CO). Interestingly, p-CO is not formed in the CO 2 plasma, in spite of the significant amounts of CO produced (up to 30% in the reactor exhaust).

show abstract

Reduction Characteristics of Carbon Dioxide Using a Plasmatron

Cited by 44 publications

References 31 publications

CO₂conversion in a gliding arc plasma: 1D cylindrical discharge model

CO₂conversion in a gliding arc plasma: 1D cylindrical discharge model

Nitrogen Fixation by Gliding Arc Plasma: Better Insight by Chemical Kinetics Modelling

Synthesis of Micro- and Nanomaterials in CO₂and CO Dielectric Barrier Discharges

Contact Info

Product

Resources

About

Reduction Characteristics of Carbon Dioxide Using a Plasmatron

Cited by 44 publications

References 31 publications

CO2conversion in a gliding arc plasma: 1D cylindrical discharge model

CO2conversion in a gliding arc plasma: 1D cylindrical discharge model

Nitrogen Fixation by Gliding Arc Plasma: Better Insight by Chemical Kinetics Modelling

Synthesis of Micro- and Nanomaterials in CO2and CO Dielectric Barrier Discharges

Contact Info

Product

Resources

About

CO₂conversion in a gliding arc plasma: 1D cylindrical discharge model

CO₂conversion in a gliding arc plasma: 1D cylindrical discharge model

Synthesis of Micro- and Nanomaterials in CO₂and CO Dielectric Barrier Discharges