Probing the impact of material properties of core-shell SiO2@TiO2 spheres on the plasma-catalytic CO2 dissociation using a packed bed DBD plasma reactor

Kaliyappan, Periyasamy; Paulus, Andreas; D’Haen, Jan; Samyn, Pieter; Uytdenhouwen, Y.; Hafezkhiabani, Neda; Bogaerts, Annemie; Meynen, Vera; Elen, Ken; Hardy, An; Bael, Marlies K. Van

doi:10.1016/j.jcou.2021.101468

Cited by 16 publications

(6 citation statements)

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“…In addition, sorption, quenching of species and/or catalytic effects can occur at the surface. Moreover, the material impact in IPC is strongly related to the reactor design parameters [105] (e.g., gap size), process conditions [105] and materials properties (e.g., geometry, size/gap ratio [106] and composition [107,108] ). Together, these effects can play different roles in enhancing or reducing the reaction performance in terms of conversion, selectivity, space-time yields, and energy efficiency.…”

Section: Catalystsmentioning

confidence: 99%

CHEMampere: Technologies for sustainable chemical production with renewable electricity and CO₂, N₂, O₂, and H₂O

et al. 2022

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The chemical industry must become carbon neutral by 2050, meaning that process-, energy-, and product-related CO 2 emissions from fossil sources are completely suppressed. This goal can only be reached by using renewable energy, secondary raw materials, or CO 2 as a carbon source. The latter can be done indirectly through the bioeconomy or directly by utilizing CO 2 from air or biogenic sources (integrated biorefinery). Until 2030, CO 2 waste from fossilbased processes can be utilized to curb fossil CO 2 emissions and reach the turning point of global fossil CO 2 emissions. A technology mix consisting of recycling technologies, white biotechnology, and carbon capture and utilization (CCU) technologies is needed to achieve the goal of carbon neutrality. In this context, CHEMampere contributes to the goal of carbon neutrality with electricity-based CCU technologies producing green chemicals from CO 2 , N 2 , O 2 , and H 2 O in a decentralized manner. This is an alternative to the e-Refinery concept, which needs huge capacities of water electrolysis for a centralized

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Section: Catalystsmentioning

confidence: 99%

CHEMampere: Technologies for sustainable chemical production with renewable electricity and CO₂, N₂, O₂, and H₂O

et al. 2022

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“…The sensitivity of synthesis induced differences in the morphology of millimeter-sized SiO2@TiO2 packing spheres on a PB-DBD CO 2 conversion rate has been shown in Ref. [17] while different core-shell materials for tuning of conversion efficiency are explored in Ref. [18].…”

Section: Introductionmentioning

confidence: 99%

Full-wave and plasma simulations of microstrip excited, high-frequency, atmospheric pressure argon microdischarges

Kourtzanidis

2023

Plasma Sources Sci. Technol.

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Two-dimensional fully coupled EM wave-plasma simulations are used to study the formation, early transient and quasi-steady state of the argon plasma excited by a two-dimensional discontinuous microstrip line. The electromagnetic waves that normally propagate in the microstrip transmission line, radiate and scatter at the position of the gap and the electric field is enhanced primarily at the corner of the gap. The microdischarge is preferentially formed at this position of the EM field hotspot and in low frequencies propagates on the dielectric surface, much like a microwave surface streamer. In longer times, diffusion dominates and the whole gap is filled with plasma of maximum density in the order of $10^{20}$ $m^{-3}$ while it occupies a volume larger than the gap. Mean electron temperatures range from 2.8 to 3.9 eV, while the plasma reaches a quasi-static regime in approximately 2 $\mu$ s having reconfigured the transmission and radiation patterns of the slitted microstrip line. The tunability of the microstrip due to plasma formation provides means for sustaining the discharge in a stable regime. For the same input EM power, the electron temperature increases with increasing excitation frequency while electron densities found to decrease. For the same wave frequency, a decrease of the electron densities with increasing gap is also found in addition to a restriction of the discharge expansion. Finally, thicker dielectrics result to higher electron densities and electron temperatures as well as absorbed power from the plasma. These findings are attributed to the dependence of absorbed EM power and skin depth on the EM wave angular frequency, the critical for shielding electron density as well as the restructuring of the S-parameters due to the changes in operational parameters.

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“…Coupling plasma reactors with catalysts present significant synergetic effects in multiple scales, that can further boost conversion efficiency [11,12]. Concerning PB-DBDs, the influence on CO 2 conversion of packing and catalyst materials, gap and sphere size combination as well as overall reactor setup and flow rates has been extensively studied [10,[13][14][15][16][17]. The above studies are surely a non-exhaustive list of the expanding literature on plasma assisted CO 2 conversion in PB-DBDs, but demonstrate the increasing interest of the technology as well as the complexities of plasma-catalyst synergies.…”

Section: Introductionmentioning

confidence: 99%

Full cycle, self-consistent, two-dimensional analysis of a packed bed DBD reactor for plasma-assisted CO2 splitting: spatiotemporal inhomogeneous, glow to streamer to surface discharge transitions

Kourtzanidis

2023

Plasma Sources Sci. Technol.

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We investigate the full-cycle operation of a coaxial Packed Bed Dielectric Barrier Discharge (PB-DBD) reactor operating in pure CO2. The reactor is packed with high permittivity dielectric rods and is analyzed with a two-dimensional (2D) self-consistent plasma model. We show that the PB-DBD operation is governed by both glow and volume/surface streamer discharges, forming alternatively and non-uniformly inside the gas volume. The presence and surface charging of the dielectric rods and dielectric layer is crucial for the initiation, propagation, annihillation and afterglow of these microdischarges. Our calculations show maximum electron and CO2 + densities in the order 1020 m-3 , an average discharge power of 353.42 W/m in the first cycle, microdischarge peak currents in the order of 50-400 A/m, total half-cycle plasma charge of around 6 μC/m. Dominant negative ions are found to be CO3 -. CO molecules and O atoms are mainly formed during the MDs development and the streamer-surface ionization waves. Molecular oxygen (O2) is preferentially formed during the glow, current-decaying and afterglow phase of each microdischarge. The spatially average reduced electric field inside the reactor lies in the 20-100 Td range. Each MD, presents distinct non-uniform and non-repeatable glow and volume/streamer discharges owed to the non-uniform surface charging processes which dictate the complex spatial distribution of produced neutral (and ion) species. These detailed results shed light on crucial, largely non-uniform plasma spatiotemporal characteristics that can help design efficient PB-DBD reactors for CO2 splitting and beyond, while emphasizing the important insights obtained by 2D simulations which can not be captured with 0D-global or 1D models.

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Probing the impact of material properties of core-shell SiO2@TiO2 spheres on the plasma-catalytic CO2 dissociation using a packed bed DBD plasma reactor

Cited by 16 publications

References 64 publications

CHEMampere: Technologies for sustainable chemical production with renewable electricity and CO₂, N₂, O₂, and H₂O

CHEMampere: Technologies for sustainable chemical production with renewable electricity and CO₂, N₂, O₂, and H₂O

Full-wave and plasma simulations of microstrip excited, high-frequency, atmospheric pressure argon microdischarges

Full cycle, self-consistent, two-dimensional analysis of a packed bed DBD reactor for plasma-assisted CO2 splitting: spatiotemporal inhomogeneous, glow to streamer to surface discharge transitions

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Probing the impact of material properties of core-shell SiO2@TiO2 spheres on the plasma-catalytic CO2 dissociation using a packed bed DBD plasma reactor

Cited by 16 publications

References 64 publications

CHEMampere: Technologies for sustainable chemical production with renewable electricity and CO2, N2, O2, and H2O

CHEMampere: Technologies for sustainable chemical production with renewable electricity and CO2, N2, O2, and H2O

Full-wave and plasma simulations of microstrip excited, high-frequency, atmospheric pressure argon microdischarges

Full cycle, self-consistent, two-dimensional analysis of a packed bed DBD reactor for plasma-assisted CO2 splitting: spatiotemporal inhomogeneous, glow to streamer to surface discharge transitions

Contact Info

Product

Resources

About

CHEMampere: Technologies for sustainable chemical production with renewable electricity and CO₂, N₂, O₂, and H₂O

CHEMampere: Technologies for sustainable chemical production with renewable electricity and CO₂, N₂, O₂, and H₂O