Electrical discharges contacting a liquid: the role of bulk liquid mass transport in the degradation of organic compounds

Vasilev, M. B.; Conlon, Patrick R.; Bohl, Douglas; Thagard, Selma Mededovic

doi:10.1109/icops35962.2018.9575944

Cited by 2 publications

(3 citation statements)

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“…Since plasma area is unaffected by rotational speed, this decrease is solely attributed to the increase in fluid velocity caused by the disc's rotational speed. Our previous work has shown that high fluid renewal rates reduce the formation of a diffusive barrier that hinders the replenishment of contaminants at the interface, which occurs when fluid under the discharge is overtreated [12]. The decrease in the dye degradation rate observed at rotational speeds greater than 300 rpm was initially attributed to the reduction in liquid layer thickness that occurs with increased rotational speed.…”

Section: The Effect Of Disc Rotational Speed On Reactor Performancementioning

confidence: 99%

“…The observed relationship between the degradation rate and residence time highlights the importance of RhB mass transport in the degradation process. In order to gain a deeper understanding of the impact of mass transport on degradation, a 1-D diffusion-reaction model was adapted from [12]. This model was used to investigate the processes occurring in the vicinity of the plasma-liquid interface and to describe the mass transport of RhB and other reactive species within a fluid element of depth δ which is in contact with plasma.…”

Section: Residence Time and Dye Degradation Ratementioning

confidence: 99%

“…The heterogeneous nature of the system requires that solutes from the bulk liquid and short-lived species generated on the plasma side be effectively transported to the interface. To ensure high contaminant removal rates, the contact area between the plasma and the treated liquid (i.e., surface area to volume treatment ratio) must be maximized, and the treated fluid under the plasma must be rapidly renewed [12]. This is often achieved through plasma reactor design, modifications in the electrode arrangement, and the introduction of bubbling [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

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Characterization and Treatment Performance of an Atmospheric Pressure Plasma Jet-Operated Spinning Disc Reactor for the Treatment of Rhodamine B Dye

Ganzallo,

Su,

Yatom

et al. 2023

Plasma Chem Plasma Process

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A spinning disc reactor is a design widely adopted in chemical process industries because of its capability to produce thin fast-moving films, which enhance the diffusive and convective transport of solutes.However, this configuration has yet to be explored for plasma-based water treatment, where mass transport limitations in the bulk liquid often limit reactor degradation efficiency. This study presents a novel plasma spinning disc reactor (PSDR) for degrading rhodamine B dye and characterizes its performance. The impact of discharge power, gas flowrate, liquid flowrate, disc rotational speed, and bulk liquid concentration on dye degradation was investigated. The results indicate that mass transport limitations within the fluid were the primary limitation to efficient degradation. Higher degradation rates were achieved primarily through changes in the plasma area, fluid velocity across the disc, and increased bulk liquid concentration, resulting in enhanced contact between the solute and the plasma. Residence time, a function of plasma area and fluid velocity, was used to describe and predict degradation rates on the PSDR using a 1-D fluid element model, which indicated that lower residence times favored dye degradation, especially for systems limited by small plasma areas.

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Section: The Effect Of Disc Rotational Speed On Reactor Performancementioning

confidence: 99%

Section: Residence Time and Dye Degradation Ratementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Characterization and Treatment Performance of an Atmospheric Pressure Plasma Jet-Operated Spinning Disc Reactor for the Treatment of Rhodamine B Dye

Ganzallo,

Su,

Yatom

et al. 2023

Plasma Chem Plasma Process

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Characterization and Treatment Performance of an Atmospheric Pressure Plasma-Jet- Operated Spinning Disc Reactor for the Treatment of Rhodamine B Dye

Ganzallo

Yatom

et al. 2023

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A spinning disc reactor is a design widely adopted in chemical process industries because of its capability to produce thin fast-moving films, which enhance the diffusive and convective transport of solutes. However, this configuration has yet to be explored for plasma-based water treatment, where mass transport limitations in the bulk liquid often limit reactor degradation efficiency. This study presents a novel plasma spinning disc reactor (PSDR) for degrading rhodamine B dye and characterizes its performance. The impact of discharge power, gas flowrate, liquid flowrate, disc rotational speed, and bulk liquid concentration on dye degradation was investigated. The results indicate that mass transport limitations within the fluid were the primary limitation to efficient degradation. Higher degradation rates were achieved primarily through changes in the plasma area, fluid velocity across the disc, and increased bulk liquid concentration, resulting in enhanced contact between the solute and the plasma. Residence time, a function of plasma area and fluid velocity, was used to describe and predict degradation rates on the PSDR using a 1-D fluid element model, which indicated that lower residence times favored dye degradation, especially for systems limited by small plasma areas.

show abstract

Electrical discharges contacting a liquid: the role of bulk liquid mass transport in the degradation of organic compounds

Cited by 2 publications

References 0 publications

Characterization and Treatment Performance of an Atmospheric Pressure Plasma Jet-Operated Spinning Disc Reactor for the Treatment of Rhodamine B Dye

Characterization and Treatment Performance of an Atmospheric Pressure Plasma Jet-Operated Spinning Disc Reactor for the Treatment of Rhodamine B Dye

Characterization and Treatment Performance of an Atmospheric Pressure Plasma-Jet- Operated Spinning Disc Reactor for the Treatment of Rhodamine B Dye

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