A comprehensive study on scaling up ethylene abatement via intermittent plasma-catalytic discharge process in a novel reactor configuration comprising multiple honeycomb monoliths

Saud, Shirjana; Bhattarai, Roshan Mangal; Nguyen, Duc Ba; Neupane, Shankar; Matyakubov, Nosir; Lee, Byungjin; Kim, Young Jin; Lee, Jin Hee; Heo, Iljeong; Mok, Young Sun

doi:10.1016/j.cej.2022.140486

Cited by 6 publications

(3 citation statements)

References 74 publications

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“…Atmospheric pressure air dielectric barrier discharges (DBDs) are widely utilised in generating the non-thermal plasma for various applications, including gas purification and conversion [1][2][3], active flow control [4][5][6], plasma medicine [7][8][9], and seed germination [10][11][12]. Due to the presence of a dielectric, the DBD reactor is powered by either the pulse [13] or alternative current (AC) power [14]. Commonly, the AC power with a few kilohertz intermediate frequency (IF) is adopted to excite the DBD for various applications owing to its simplicity of implementation and a higher frequency of breakdown occurring [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical study on atmospheric‐pressure air dielectric barrier discharge via 50 Hz/5000 Hz dual‐frequency excitation

He,

Peng,

et al. 2024

High Voltage

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A dual‐frequency (DF) dielectric barrier discharge, excited by the superposition of a 50 Hz low frequency (LF) and a 5000 Hz intermediate frequency (IF), is proposed to enhance discharge. The effect of the LF voltage component on the breakdown behaviour of the DF discharge during different periods has been studied both experimentally and numerically. The number of high‐current pulses rises as the LF voltage increases. The statistical analysis shows that the number of the current pulse amplitude above 80 mA in the DF discharge reaches nearly 6 times that in the IF discharge. Additionally, the total discharge energy in the DF discharge is significantly higher than that in the IF discharge. The simulation reproduces the temporal variation of the breakdown behaviours in the DF discharge. The simulated results reveal that the maximal electric field strength of the breakdown process is greater in the DF discharge compared to the IF discharge during a half‐period of DF. Finally, the comparison between the IF and DF discharges exhibits that the LF voltage regulates the accumulation of residual charged species on the dielectric surface after the breakdown by modulating the residual voltage between the air gap.

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Section: Introductionmentioning

confidence: 99%

Experimental and numerical study on atmospheric‐pressure air dielectric barrier discharge via 50 Hz/5000 Hz dual‐frequency excitation

He,

Peng,

et al. 2024

High Voltage

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“…However, it is not advantageous for a high flow rate due to the limited discharge gap between the electrodes. In contrast, the application of corona plasma can overcome this limitation with a parallel electrode configuration; − for a large discharge gap at atmospheric pressure, the corona onset voltage has a low breakdown voltage . Owing to the large discharge gap, the corona plasma presents a low current discharge at the mA level, suggesting a low conversion of HCs by the plasma.…”

Section: Introductionmentioning

confidence: 99%

Essential Features of Gliding Arc Plasma for High-Performance Hydrocarbon Selective Catalytic Reduction of NO_xat Low Temperatures

Denra

Matyakubov

Saud

et al. 2023

Ind. Eng. Chem. Res.

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The high removal efficiency of NO x from diesel engine exhaust gas at low temperatures remains challenging due to the poor activity of catalysts under this condition. This work investigated the effectiveness of gliding arc plasma in the NO x removal over the Ag/γ-Al 2 O 3 catalyst with n-heptane as a reducing agent source for NO x reduction. The plasma conjugated with the catalyst was performed like an injection method, i.e., a small part flow (1/26) that consisted of n-heptane was reformed to H 2 and oxygenated hydrocarbons (OHCs) by gliding arc plasma before mixing it with the gas containing NO x . Then, the overall gas was passed through the catalyst stage at various temperatures from 127 to 253 °C. The experimental data revealed that NO x removal efficiency significantly increased with plasma treatment. The enhancement by plasma treatment increased with temperature from 127 to 226 °C, but the enhancement reduced at a temperature of 253 °C. The result came from formation of H 2 and OHCs in the treated plasma gas, which reactivated NO x removal over the catalyst at low temperatures. Moreover, the enhanced NO x removal efficiency in a wide low-temperature range is obtained due to considerable hydrogen formation by the gliding arc plasma. To sum up, the highest NO x removal efficiency was 68.5% under a temperature of 226 °C and specific energy input of 34.6 J/L, while it was 20.3% for the catalyst alone; in other words, the removal efficiency increased by 48.1% with using plasma under these conditions. Owing to its low energy consumption, high-throughput gas treatment, and effectiveness at low temperatures, the technology is promising in practical applications for refining diesel exhaust gases.

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“…However, none of them have presented a detailed design methodology, and many were combined into a more complex system to realize high performance, which makes them difficult to construct at a low cost. In contrast, another idea that upscales the cylindrical DBD reactors is to use a catalytic monolith to support a large-volume discharge zone, while the overall system and discharge characteristics are confined by the geometric size of the monolith [35][36][37][38]. In this regard, as has been shown previously, two types of high-flow-rate DBD reactors, specifically single-and two-layer DBD reactors, have been developed [29].…”

Section: Introductionmentioning

confidence: 99%

Design and Characterization of an Upscaled Dielectric Barrier Discharge-Based Ten-Layer Plasma Source for High-Flow-Rate Gas Treatment

Xu,

Mori,

Liu

et al. 2023

Applied Sciences

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Dielectric barrier discharge (DBD)-based technology is considered a promising alternative for controlling indoor air pollutants. However, its limited processing capacity and lack of design techniques have restricted its use in practical applications. This paper introduces a methodology for designing upscaled DBD reactors with a processing capacity of up to 1000 L/min for treating high-flow-rate gases to mitigate indoor air pollution. A ten-layer high-flow-rate DBD reactor was constructed, with fundamental characterizations, including electrical and spectroscopic measurements, conducted to verify the feasibility of the proposed methodology. In particular, the flow paths of the ten-layer DBD reactor were optimized by incorporating an air diffuser and perforated metal plates, all without significant modifications. Computational fluid dynamics simulations showed a remarkably improved velocity uniformity (0.35 m/s to 0.04 m/s, as evidenced by the velocity standard deviation) in the 10 flow channels. These simulation results were consistent with the experimental results, wherein the velocity standard deviation reduced from 1.38 m/s to 0.13 m/s. Moreover, multi-gas plasma ignition for up to six gas species and high-flow-rate plasma generation of up to 1000 L/min were achieved. These results provide the foundation for developing DBD technologies for practical applications in high-flow-rate gas treatment, particularly for controlling indoor air pollution.

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A comprehensive study on scaling up ethylene abatement via intermittent plasma-catalytic discharge process in a novel reactor configuration comprising multiple honeycomb monoliths

Cited by 6 publications

References 74 publications

Experimental and numerical study on atmospheric‐pressure air dielectric barrier discharge via 50 Hz/5000 Hz dual‐frequency excitation

Experimental and numerical study on atmospheric‐pressure air dielectric barrier discharge via 50 Hz/5000 Hz dual‐frequency excitation

Essential Features of Gliding Arc Plasma for High-Performance Hydrocarbon Selective Catalytic Reduction of NO_xat Low Temperatures

Design and Characterization of an Upscaled Dielectric Barrier Discharge-Based Ten-Layer Plasma Source for High-Flow-Rate Gas Treatment

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A comprehensive study on scaling up ethylene abatement via intermittent plasma-catalytic discharge process in a novel reactor configuration comprising multiple honeycomb monoliths

Cited by 6 publications

References 74 publications

Experimental and numerical study on atmospheric‐pressure air dielectric barrier discharge via 50 Hz/5000 Hz dual‐frequency excitation

Experimental and numerical study on atmospheric‐pressure air dielectric barrier discharge via 50 Hz/5000 Hz dual‐frequency excitation

Essential Features of Gliding Arc Plasma for High-Performance Hydrocarbon Selective Catalytic Reduction of NOxat Low Temperatures

Design and Characterization of an Upscaled Dielectric Barrier Discharge-Based Ten-Layer Plasma Source for High-Flow-Rate Gas Treatment

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Essential Features of Gliding Arc Plasma for High-Performance Hydrocarbon Selective Catalytic Reduction of NO_xat Low Temperatures