Formation of surface ionization waves in a plasma enhanced packed bed reactor for catalysis applications

Zaka-ul-Islam, M.; Kruszelnicki, Juliusz; Hala, Ahmed; Kushner, Mark J.

doi:10.1016/j.cej.2019.123038

Cited by 32 publications

(42 citation statements)

References 28 publications

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“…We attribute this slightly higher electrical conductivity on PEL to the porosity of the PEL paper. It is known that nonthermal plasmas can propagate through porous media via both surface ionization waves and microfilaments, − and thus, the plasma jet likely penetrates into the PEL, allowing for greater exposure to the silver NPs. It is notable that the measured conductivity values are lower than bulk silver conductivity (6.3 × 10 7 S/m), suggesting that the films were not fully sintered.…”

Section: Results and Discussionmentioning

confidence: 99%

Atmospheric Pressure and Ambient Temperature Plasma Jet Sintering of Aerosol Jet Printed Silver Nanoparticles

Turan

Saeidi‐Javash

Zeng

et al. 2021

ACS Appl. Mater. Interfaces

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Atmospheric pressure nonthermal plasmas hold great promise for applications in environmental control, energy conversion, and material processing. Even at room temperature, nonthermal plasmas produce energetic and reactive species that can initiate surface modifications at a plasma–surface interface, including thin-film nanoparticle assemblies, in a nondestructive and effective way. Here, we present the plasma-activated sintering of aerosol jet printed silver thin films on substrates ranging from glass to delicate materials including blotting paper, fruits, and flexible plastic. We characterize the microstructural evolutions and electrical properties of printed films along with the electrical, thermal, and optical properties of an argon plasma jet. We demonstrate an electrical conductivity as high as 1.4 × 106 S/m for printed films sintered under atmospheric conditions in which the surface temperature stays below 50 °C. These results highlight a future direction where additive manufacturing of electronic devices can be achieved on flexible and low-melting-point materials under ambient conditions without requiring additional thermal processing by utilizing nonthermal plasmas.

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Section: Results and Discussionmentioning

confidence: 99%

Atmospheric Pressure and Ambient Temperature Plasma Jet Sintering of Aerosol Jet Printed Silver Nanoparticles

Turan

Saeidi‐Javash

Zeng

et al. 2021

ACS Appl. Mater. Interfaces

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“…Furthermore, the effect of periodic discharges and capacitive regimes is not fully understood, both on the catalytic properties of the surface 323,324 and on the plasma characteristics near the catalyst. 225,230,325 For instance, Ardagh et al 323,324 reported that oscillatory surface binding strengths, induced by for instance electric fields, may enhance the catalytic activity by orders of magnitude. Furthermore, the waveform and the frequency of the oscillation can determine the catalytic activity.…”

Section: Plasma-catalytic Ammonia Synthesis: the Complexity Aheadmentioning

confidence: 99%

Plasma-driven catalysis: green ammonia synthesis with intermittent electricity

et al. 2020

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“…A 2D plasma hydrodynamics model is proposed to get an understanding for the splitting and merging of fast ionization wave in a small diameter branched loop channel, and shows that the mutual influence reduces the speed of two facing plasma propagation [33]. The volume discharge and surface discharge appearing in packed-bed configuration, which are not easy to be measured and diagnosed via experiment, are demonstrated and analysed through the numerical simulation [34]. In the pulsed SDBD, two distinct discharge phases are also reproduced through the numerical simulation.…”

Section: Introductionmentioning

confidence: 99%

Streamer dynamics and charge self‐erasing of two counter‐propagating plasmas in repetitively pulsed surface dielectric barrier discharge

et al. 2022

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The streamer dynamics and charge self‐erasing of two counter‐propagating plasmas generated by repetitively pulsed surface dielectric barrier discharge are investigated using electrical and optical diagnosis, and a two‐dimensional fluid model. Three distinct discharge phases of primary, transitional and secondary streamers are identified in a single‐pulse discharge through the time‐resolved plasma images. Moreover, a merging phenomenon of the two opposing primary streamers is observed at the middle position of the discharge gap. Compared to the first pulse, a low streamer propagation velocity of the primary streamer is measured during the subsequent discharge process due to the limitation of residual surface charges left by the previous discharge. No significant differences of the transferred charge and the deposited energy are obtained in the sequential pulses at a discharge gap of 9 mm. Numerical simulations show that a reduction for the plasma intensity of the approached two primary streamers is attributed by the accumulated charge on the dielectric surface and gathered positive charges in the streamer head. Numerical and experimental studies indicate that the residual charges can be erased by the secondary streamer through the drifted electrons, namely that a phenomenon of charge self‐erasing can be realized in the individual pulse.

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Formation of surface ionization waves in a plasma enhanced packed bed reactor for catalysis applications

Cited by 32 publications

References 28 publications

Atmospheric Pressure and Ambient Temperature Plasma Jet Sintering of Aerosol Jet Printed Silver Nanoparticles

Atmospheric Pressure and Ambient Temperature Plasma Jet Sintering of Aerosol Jet Printed Silver Nanoparticles

Plasma-driven catalysis: green ammonia synthesis with intermittent electricity

Streamer dynamics and charge self‐erasing of two counter‐propagating plasmas in repetitively pulsed surface dielectric barrier discharge

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