A rotational Raman study under non-thermal conditions in a pulsed CO<sub>2</sub>glow discharge

Klarenaar, Bart; Grofulović, Marija; Morillo-Candas, Ana Sofia; Bekerom, D C M van den; Damen, Mark; Sanden, M.C.M. van de; Guaitella, Olivier; Engeln, Richard

doi:10.1088/1361-6595/aabab6

Cited by 38 publications

(80 citation statements)

References 49 publications

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“…These measurements were performed with the short discharge tube (23 cm), which fits into the sample compartment of the FTIR; however, the atomic oxygen measurements were made in the long discharge reactor (67 cm). The radii of both tubes are the same, and there is no axial gradient along the tube since the diffusion dominates over the motion due to the gas flow, homogenizing the concentrations as has been confirmed by Raman scattering measurement along the tube axis [57]. Therefore, the main difference between the two discharge tubes is the length between the electrodes, which, for a given flow, implies a different residence time (τ res ) of the gas in the plasma.…”

Section: Co 2 Dissociation and O Atom Densities 51 Dissociation Fraction In Continuous Co 2 Plasmamentioning

confidence: 74%

Oxygen atom kinetics in CO₂ plasmas ignited in a DC glow discharge

Morillo-Candas

Drag

Booth

et al. 2019

Plasma Sources Sci. Technol.

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125

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Oxygen atom densities were measured in situ in a CO 2 glow discharge, at pressures between 0.2 and 5 Torr . Two measurement techniques were compared, namely optical emission actinometry (using Ar as the actinometer) and High-Resolution Two-photon Absorption Laser Induced Fluorescence (HR-TALIF) normalised to Xe, and were found to give consistent results. The variation of the atomic oxygen density with gas pressure shows two different regimes with a transition around 1 Torr. Measurements of the O atom loss frequency under plasma exposure showed that this behaviour is caused by a change in the O atom loss mechanisms, which are dominated by surface processes in our experimental conditions. The corresponding recombination probabilities on Pyrex γ O are found to vary with the gas temperature near the wall for a constant surface temperature, similarly to what has recently been obtained in pure O 2 . However, the measured values are more than two times lower than γ O obtained in a O 2 plasma in similar conditions. The O atom densities are also compared to the dissociation fraction of CO 2 determined by infra-red absorption. The obtained CO and O densities show different behaviour as a function of the energy input. The simultaneous measurement of gas temperature, electric field, O, CO and CO 2 densities and O atoms loss frequency in the same conditions provides an ideal set of constraints for validating CO 2 plasma kinetic models.

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Section: Co 2 Dissociation and O Atom Densities 51 Dissociation Fraction In Continuous Co 2 Plasmamentioning

confidence: 74%

Oxygen atom kinetics in CO₂ plasmas ignited in a DC glow discharge

Morillo-Candas

Drag

Booth

et al. 2019

Plasma Sources Sci. Technol.

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125

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“…In the past decade, many papers, both experimental (e.g., Silva et al, 2014Silva et al, , 2017Klarenaar et al, 2017Klarenaar et al, , 2018Klarenaar et al, , 2019Stewig et al, 2020;Terraz et al, 2020;van den Bekerom et al, 2020) and computational (e.g., Bogaerts, 2014, 2015;Pietanza et al, 2015Pietanza et al, , 2017aPietanza et al, ,b, 2018aPietanza et al, ,b, 2020Bogaerts, 2016, 2018;Capitelli et al, 2017, Heijkers andGrofulović et al, 2018;Silva et al, 2018;Bogaerts, 2018, 2019;Kotov and Koelman, 2019;Terraz et al, 2020), focused on the role of the vibrational kinetics in plasmas, but mainly at low pressure conditions (few mbar up to a few hundred mbar). Most of these studies revealed the importance of the vibrational kinetics at specific conditions (low gas temperature, low pressure) and their contribution to a high energy efficiency.…”

Section: Different Dissociation Mechanisms In Different Plasma Typesmentioning

confidence: 99%

Plasma Technology for CO2 Conversion: A Personal Perspective on Prospects and Gaps

2020

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There is increasing interest in plasma technology for CO 2 conversion because it can operate at mild conditions and it can store fluctuating renewable electricity into value-added compounds and renewable fuels. This perspective paper aims to provide a view on the future for non-specialists who want to understand the role of plasma technology in the new scenario for sustainable and low-carbon energy and chemistry. Thus, it is prepared to give a personal view on future opportunities and challenges. First, we introduce the current state-of-the-art and the potential of plasma-based CO 2 conversion. Subsequently, we discuss the challenges to overcome the current limitations and to apply plasma technology on a large scale. The final section discusses the general context and the potential benefits of plasma-based CO 2 conversion for our life and the impact on climate change. It also includes a brief analysis on the future scenario for energy and chemical production, and how plasma technology may realize new paths for CO 2 utilization.

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“…For all these setups, a triple grating spectrometer is the most common method to eliminate the stray light, [ 11,13,20 ] but such a method requires a complicated optical setup. A volume Bragg notch filter with single grating can also be used to get rid of Rayleigh scattering signal, [ 19,21 ] but the alignment of the optical path is difficult to achieve. Recently, a new setup has been developed by Chen et al [ 22 ] for middle‐pressure discharges, which is implemented in low‐pressure discharges.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the electron density and temperature in a nanosecond pulsed helium plasma jet with Thomson scattering

Xian

et al. 2021

Plasma Processes & Polymers

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Diagnostic of spatiotemporal distribution of the electron density and temperature of atmospheric pressure plasma jets is a difficult task, as Thomson scattering, which is the most used measurement, suffers from the stray light induced by Rayleigh scattering. In this paper, a new strategy is reported to restrain the stray light in Thomson scattering. With a physical mask placed at the output of a single spectrometer, the scattering signal is obtained with a relatively high ratio of signal to noise. The electron density in a pulsed kHz‐driven atmospheric plasma jet interacting with a dielectric target is measured by using this method. A donut‐shaped distribution of electron density is observed at an axial position 1 mm away from the nozzle. The radius of the ring structure decreases with the reduction of the gas flow rate. The electron density reaches a maximum of about 4.5 × 1020 m−3 at a delay time of 150 ns from the onset of the pulse. A similar time relationship between the electron density and plasma emission intensity is also identified. Higher applied voltage leads to a faster increasing and a higher peak value of the electron density. Pulse width shows little impact on the generation and decay of electrons.

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A rotational Raman study under non-thermal conditions in a pulsed CO₂glow discharge

Abstract: A rotational Raman study under non-thermal conditions in a pulsed CO 2 glow discharge. Plasma Sources Science and Technology, 27(4), [045009].

Cited by 38 publications

References 49 publications

Oxygen atom kinetics in CO₂ plasmas ignited in a DC glow discharge

Oxygen atom kinetics in CO₂ plasmas ignited in a DC glow discharge

Plasma Technology for CO2 Conversion: A Personal Perspective on Prospects and Gaps

Investigation on the electron density and temperature in a nanosecond pulsed helium plasma jet with Thomson scattering

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A rotational Raman study under non-thermal conditions in a pulsed CO2glow discharge

Abstract: A rotational Raman study under non-thermal conditions in a pulsed CO 2 glow discharge. Plasma Sources Science and Technology, 27(4), [045009].

Cited by 38 publications

References 49 publications

Oxygen atom kinetics in CO2 plasmas ignited in a DC glow discharge

Oxygen atom kinetics in CO2 plasmas ignited in a DC glow discharge

Plasma Technology for CO2 Conversion: A Personal Perspective on Prospects and Gaps

Investigation on the electron density and temperature in a nanosecond pulsed helium plasma jet with Thomson scattering

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Product

Resources

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A rotational Raman study under non-thermal conditions in a pulsed CO₂glow discharge

Oxygen atom kinetics in CO₂ plasmas ignited in a DC glow discharge

Oxygen atom kinetics in CO₂ plasmas ignited in a DC glow discharge