Comparison of reactor performance in the nonthermal plasma chemical processing of hazardous air pollutants

Futamura, Shigeru; Einaga, Hisahiro; Zhang, A.

doi:10.1109/28.936387

Cited by 50 publications

(18 citation statements)

References 13 publications

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“…Even if the CO 2 selectivity increased significantly with decreasing TCE initial concentration, the energy cost for total oxidation was still higher at low concentration as compared to high concentration. The increase in energy costs with input energy, despite the fact that both the conversion and the CO 2 selectivity are higher at high energy, is a typical result in plasma treatment processes [7,8,13].…”

Section: Resultsmentioning

confidence: 96%

“…Kirkpatrick et al [6] detected DCAC as the primary byproduct of TCE decomposition as well. A number of other byproducts of TCE oxidation in plasma were detected by Futamura et al [8] using GC-MS: pentachloroethane (Cl 3 C-CHCl 2 ), dichloroacetonitrile (Cl 2 CH-CN) and small amounts of tetrachloroethylene (Cl 2 C=CCl 2 ), and chloroacetylene (ClC:CH). However, they did not observe DCAC among the reaction products.…”

Section: Discussion Of Reaction Products and Reaction Pathwaysmentioning

confidence: 99%

“…Various types of electrical discharges have been investigated for the oxidation of chlorinated hydrocarbons: pulsed corona discharges [5][6][7][8][9], atmospheric pressure glow discharges [10], dielectric barrier discharges [8,9,[11][12][13][14][15][16], dielectric packed-bed discharges [3,4,8,12,15,17], surface discharges [13,14,18]. A recent review [19] summarizes non-thermal plasma techniques for the destruction of air pollutants.…”

Section: Introductionmentioning

confidence: 99%

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Chlorinated Organic Compounds Decomposition in a Dielectric Barrier Discharge

Măgureanu

Mandache

Parvulescu

2007

Plasma Chem Plasma Process

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The decomposition of chlorinated volatile organic compounds by non-thermal plasma generated in a dielectric barrier discharge was investigated. As model compounds trichloroethylene (TCE) and 1,2-dichloroethane (DCE) were chosen. It was found that TCE removal exceeds 95% for input energy densities above 0.2 eV/molecule, regardless of the initial concentration of TCE, in the range 100-750 ppm. On the other hand, DCE was more difficult to decompose, the removal rate reached a maximum of 60% at the highest input energy used. For both investigated compounds the selectivity towards carbon dioxide was significantly influenced by their initial concentration, increasing when low concentrations were used. The gas flow rate had also an effect on CO 2 selectivity, which is higher at low flow rate, due to the higher residence time of the gas in the plasma. The best values obtained in these experiments were around 80%.

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Section: Resultsmentioning

confidence: 96%

Section: Discussion Of Reaction Products and Reaction Pathwaysmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Chlorinated Organic Compounds Decomposition in a Dielectric Barrier Discharge

Măgureanu

Mandache

Parvulescu

2007

Plasma Chem Plasma Process

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“…The model predicts as major byproduct phosgene, formed by the reaction of ClO radicals with TCE, and also small amounts of formyl chloride (CHOCl). Other byproducts of TCE oxidation in plasma detected by Futamura et al [8] include pentachloroethane (Cl 3 C-CHCl 2 ), dichloroacetonitrile (Cl 2 CH-CN) and small amounts of tetrachloroethylene (Cl 2 C CCl 2 ), and chloroacetylene (ClCBBCH). However, we did not detect any of these products under the present experimental condition.…”

Section: Reaction Products Of Tce Decompositionmentioning

confidence: 98%

“…Various types of electrical discharges have been investigated for the oxidation of chlorinated hydrocarbons: pulsed corona discharges [5][6][7][8][9], atmospheric pressure glow discharges [10], dielectric barrier discharges [8,9,[11][12][13][14][15][16], dielectric packed-bed discharges [3,4,8,12,15,17], surface discharges [13,14,18]. In a recent review of the physics and applications of dielectric barrier discharges (DBD) [2], Kogelschatz addresses also the treatment of VOC, mentioning as main advantages of DBDs their simplicity and scalability.…”

Section: Introductionmentioning

confidence: 99%

Improved performance of non-thermal plasma reactor during decomposition of trichloroethylene: Optimization of the reactor geometry and introduction of catalytic electrode

Măgureanu

Mandache

Parvulescu

et al. 2007

Applied Catalysis B: Environmental

117

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The decomposition of trichloroethylene (TCE) by non-thermal plasma was investigated in a dielectric barrier discharge (DBD) reactor with a copper rod inner electrode and compared with a plasma-catalytic reactor. The particularity of the plasma-catalytic reactor is the inner electrode made of sintered metal fibers (SMF) coated by transition metal oxides. In order to optimize the geometry of the plasma reactor, the efficiency of TCE removal was compared for different discharge gap lengths in the range of 1-5 mm. Shorter gap lengths (1-3 mm) appear to be more advantageous with respect to TCE conversion. In this case TCE conversion varies between 67% and 100% for input energy densities in the range of 80-480 J/l, while for the 5 mm discharge gap the conversion was lower (53-97%) for similar values of the input energy. As a result of TCE oxidation carbon monoxide and carbon dioxide were detected in the effluent gas. Their selectivity was rather low, in the range 14-24% for CO 2 and 11-23% for CO, and was not influenced by the gap length. Several other chlorinated organic compounds were detected as reaction products.When using MnOx/SMF catalysts as the inner electrode of the DBD reactor, the TCE conversion was significantly enhanced, reaching $95% at 150 J/l input energy. The selectivity to CO 2 showed a major increase as compared to the case without catalysts, reaching 58% for input energies above 550 J/l. #

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Nonthermal Plasma Processing for Air‐Pollution Control: A Historical Review, Current Issues, and Future Prospects

Kim

2004

Plasma Processes & Polymers

615

366

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Summary: This review describes the historical development, current status, and future prospects for nonthermal plasma (NTP) technology and its application as an air‐pollution control. In particular, this review focuses on the cutting‐edge technology of hybrid NTP, where it is combined with other methods such as wet processing, the use of adsorbents, and catalysis. Historical landmarks in the development of NTP technology and the current status of large‐scale applications are discussed. The general characteristics of the combined system of NTP with catalysts are described in the context of the decomposition of NOx and benzene.Comparison of different NTP reactors for 200 ppm benzene decomposition (water vapor 0.5 vol.‐%).magnified imageComparison of different NTP reactors for 200 ppm benzene decomposition (water vapor 0.5 vol.‐%).

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Comparison of reactor performance in the nonthermal plasma chemical processing of hazardous air pollutants

Cited by 50 publications

References 13 publications

Chlorinated Organic Compounds Decomposition in a Dielectric Barrier Discharge

Chlorinated Organic Compounds Decomposition in a Dielectric Barrier Discharge

Improved performance of non-thermal plasma reactor during decomposition of trichloroethylene: Optimization of the reactor geometry and introduction of catalytic electrode

Nonthermal Plasma Processing for Air‐Pollution Control: A Historical Review, Current Issues, and Future Prospects

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