Oxidation System of Adsorbed VOCs on Adsorbent Using Nonthermal Plasma Flow

Kuroki, Tetsuo; Hirai, Kiyoyuki; Matsuoka, Shigeru; Kim, J. Y.; Okubo, Masaaki

doi:10.1109/tia.2011.2155013

Cited by 17 publications

(7 citation statements)

References 24 publications

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“…Up to now, only a few studies on pilot scales with gas circulation have been reported [59]. To achieve an economically feasible VOC removal process without gas circulation, cyclic operation of VOC adsorption and catalyst regeneration has been proposed by researchers.…”

Section: Discussionmentioning

confidence: 99%

“…A pilot-scale test of a toluene oxidation system was developed using an adsorbent (zeolite pellets) and a NTP (surface discharge) with gas circulation by Kuroki et al [59]. When 1 mL of toluene was oxidized for 90 min, the conversion ratio of toluene to COx was 88% wherein 94% CO2 selectivity was achieved.…”

Section: Sequential Treatment (Adsorption Followed By Ntp Oxidation)mentioning

confidence: 99%

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Abatement of VOCs with Alternate Adsorption and Plasma-Assisted Regeneration: A Review

et al. 2015

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Abstract:Energy consumption is an important concern for the removal of volatile organic compounds (VOCs) from waste air with non-thermal plasma (NTP). Although the combination of NTP with heterogeneous catalysis has shown to reduce the formation of unwanted by-products and improve the energy efficiency of the process, further optimization of these hybrid systems is still necessary to evolve to a competitive air purification technology. A newly developed innovative technique, i.e., the cyclic operation of VOC adsorption and NTP-assisted regeneration has attracted growing interest of researchers due to the optimized energy consumption and cost-effectiveness. This paper reviews this new technique for the abatement of VOCs as well as for regeneration of adsorbents. In the first part, a comparison of the energy consumption between sequential and continuous treatment is given. Next, studies dealing with adsorption followed by NTP oxidation are reviewed. Particular attention is paid to the adsorption mechanisms and the regeneration of catalysts with in-plasma and post-plasma processes. Finally, the influence of critical process parameters on the adsorption and regeneration steps is summarized.

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Section: Discussionmentioning

confidence: 99%

Section: Sequential Treatment (Adsorption Followed By Ntp Oxidation)mentioning

confidence: 99%

Abatement of VOCs with Alternate Adsorption and Plasma-Assisted Regeneration: A Review

et al. 2015

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“…There is little effect on CO 2 concentration with spraying large amounts of water when toluene is converted to CO and CO 2 to some extent. The final CO 2 Fig. 8.…”

Section: A Adsorption Processmentioning

confidence: 99%

“…The combustion decomposition methods include direct combustion, catalytic oxidation, and thermal storage oxidation, while the other methods include membrane separation, biological treatments, photocatalytic decomposition, and plasma decomposition. We have been investigating a new technology for decomposing adsorbed VOCs that uses nonthermal plasma (NTP) flow [1], [2], which is easily generated at low cost with a compact apparatus. Using this technique, it is possible to efficiently decompose VOCs with concentrations in the range 10-1000 ppm at low cost.…”

Section: Introductionmentioning

confidence: 99%

“…An aim of the study is to achieve the conversion of VOCs into CO and CO 2 without the emission of HCHO, HCOOCH 3 , and other VOCs. In previous study, pilot-scale test of the toluene oxidative decomposition system was developed [2] and adsorbed toluene was efficiently converted to CO x using the NTP flow. However, it is essential for practical use to further improve the conversion rate and energy efficiency.…”

Section: Introductionmentioning

confidence: 99%

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Effect of water spray on adsorbed toluene decomposition by nonthermal plasma flow

Kuroki

Tanaka

Okubo

2014

2014 IEEE Industry Application Society Annual Meeting

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We have been investigating a technology for decomposing adsorbed volatile organic compounds (VOCs) using a nonthermal plasma flow, which is easily generated at low cost with a compact apparatus. In this study, we investigated the effect of water spray on the decomposition of adsorbed toluene that is achieved using nonthermal plasma flow. Spraying water upstream of the adsorbent should increase the amount of OH radicals, which form a strong oxidizing agent, and thereby enhance the toluene oxidation. Two different water spray conditions are tested: (I) spraying for 10 s after 30 min, spraying for 20 s after 60 min, and spraying for 10 s every 3 min from 90 min to 120 min; and (II) spraying for 10 s every 5 min. The decomposition efficiencies under conditions I and II are compared to that achieved without water spray. With no water spray and under condition I, the toluene conversion efficiency reaches a maximum of 98% in 105 min after the experiment starts. In contrast, the conversion efficiency is 76% under condition II. Excessive humidity is known to decrease ozone generation; therefore, the conversion efficiency decreases.

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Zeolite‐Based Materials for Catalytic Oxidation of Volatile Organic Compounds

Qiu,

Lu,

Zeng

et al. 2024

ChemCatChem

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Owing to the structural stability, modifiable acidity and abundant pores/channels, zeolite‐based materials can act as catalysts or supports for effective conversion of volatile organic compounds (VOCs). In this review, a series of VOC oxidation processes catalyzed by zeolite‐based materials will be introduced, which include thermal oxidation, photocatalytic degradation, plasma‐driven removal, catalytic ozonation, microwave‐assisted degradation and hybrid systems, where the specific roles, modification strategies and structure‐performance relationships of zeolites are discussed in depth. The following topics will also be covered, including the catalytic mechanisms of VOC oxidation, types of zeolite‐based materials in VOC catalytic oxidation, operation parameters in the processes, and reactor designs for efficiency optimization and cost control.

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Oxidation System of Adsorbed VOCs on Adsorbent Using Nonthermal Plasma Flow

Cited by 17 publications

References 24 publications

Abatement of VOCs with Alternate Adsorption and Plasma-Assisted Regeneration: A Review

Abatement of VOCs with Alternate Adsorption and Plasma-Assisted Regeneration: A Review

Effect of water spray on adsorbed toluene decomposition by nonthermal plasma flow

Zeolite‐Based Materials for Catalytic Oxidation of Volatile Organic Compounds

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