Electron beam and pulsed corona processing of carbon tetrachloride in atmospheric pressure gas streams

Penetrante, B.M.; Hsiao, M.C.; Bardsley, J. N.; Merritt, B.T.; Vogtlin, G.E.; Wallman, P.H.; Kuthi, A.; Burkhart, C.; Bayless, J. R.

doi:10.1016/0375-9601(95)00789-4

Cited by 69 publications

(43 citation statements)

References 21 publications

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“…For the present, the non-thermal plasma decomposition method has attracted a lot of interest as an effective method for decomposition of organic halogenated compounds [4][5][6]. The main features of non-thermal plasma treatment are summarized as (1) simple operation, at room temperature, with low-energy consumption; (2) adaptability to low-concentration organic halogens; (3) simplicity and compactness of the apparatus, etc.…”

Section: Introductionmentioning

confidence: 99%

Decomposition of dichloromethane and in situ alkali absorption of resulting halogenated products by a packed-bed non-thermal plasma reactor

Iijima

Nakamura

Yokoi

et al. 2011

J Mater Cycles Waste Manag

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For an effective decomposition and removal of organic halogenated compounds, a packed-bed non-thermal plasma reactor with in situ absorption of the resulting halogenated products by alkaline sorbent incorporated was proposed. In the plasma reactor, a-Al 2 O 3 particles of 1 and 3 mm (mean particle diameter) were packed as solid dielectric medium to enhance the plasma power density in the reactor. Further, alkaline sorbent of Ca(OH) 2 was doped onto the surface of a-Al 2 O 3 particles, in order to remove halogenated products by in situ absorption with Ca(OH) 2 . A high-voltage and high-frequency pulsed power of -15 to 15 kV and 1 kHz was applied to the wire electrode of the plasma reactor by means of a DC power source. In the present study, as the sample of an organic halogenated compound that is most popularly used, we selected dichloromethane (CH 2 Cl 2 ), and 500 ppm of the initial concentration of CH 2 Cl 2 was fed into the reactor accompanied by air at a fixed flow rate of 500 9 10 -6 m 3 min -1 at room temperature. As a result, it was recognized that the amount of CH 2 Cl 2 decomposed by nonthermal plasma in an a-Al 2 O 3 particle bed increased with an increase in plasma input power. The ratio of decomposition of CH 2 Cl 2 was almost 100% at 13 kV of electric power and 1 kHz frequency, and CO 2 , CH 3 Cl, COCl 2 , HCl, and Cl 2 were observed as the major reaction products. On the other hand, when CH 2 Cl 2 was introduced into the plasma reactor where a-Al 2 O 3 particles doped with Ca(OH) 2 were packed, the ratio of decomposition of CH 2 Cl 2 became higher, compared to the case that a-Al 2 O 3 particles were not doped with Ca(OH) 2 . Moreover, there were no halogenated by-product gases detected in the outlet gas from the reactor. As the solid reaction products, CaClOH and Ca(ClO) 2 Á4H 2 O were detected on Ca(OH) 2 by X-ray diffraction. From these findings, it was recognized that CH 2 Cl 2 was decomposed more effectively without producing unwanted harmful halogenated byproducts in the proposed non-thermal plasma reactor where a-Al 2 O 3 particles doped with Ca(OH) 2 sorbent were packed.

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Section: Introductionmentioning

confidence: 99%

Decomposition of dichloromethane and in situ alkali absorption of resulting halogenated products by a packed-bed non-thermal plasma reactor

Iijima

Nakamura

Yokoi

et al. 2011

J Mater Cycles Waste Manag

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“…Kinetic model of chlorinated methane compound decomposition in dry air (mostly, VOCs were presented together with atmospheric air) under plasma conditions has been investigated also (Indarto et al 2005a;2006a;2007b;Penetrante et al 1995;Koch et al 1995;Nichipor et al 2000). The theoretical model suggested that the main product could be Cl 2 , COCl 2 , CO, CO 2 , ClNO 3 and ClO 3 .…”

Section: Decomposition Of Chlorinated Volatile Organic Carbonsmentioning

confidence: 96%

Decomposition of greenhouse gases by plasma

et al. 2008

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The topic of decomposition and reduction of greenhouse gases is becoming an important issue in tackling the global warming effect since several years ago. Several technologies, including plasma-utilized process, were proposed to improve the treatment ability for the destruction of green house gases usually emitted by industrial activities. In this review paper, the application of plasma to reduce the emission of greenhouse gases was briefly summarized.

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“…CCl 4 + Cl → CCl 3 + Cl 2 (4) In the presence of oxygen, CCl 4 and CCl 3 radicals may react in different ways [12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Conversion of tetrachloromethane in large scale gliding discharge reactor

2014

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Gliding discharge plasma in a large scale reactor was used for decomposition of tetrachloromethane. The new power supply system based on a power inverter was used. The conversion of CCl 4 was investigated in air at normal pressure. The reactor was made of a quartzglass tube 60 mm in diameter and contained three converging electrodes 140 mm long. Effects of the initial CCl 4 concentration, gas flow rate and discharge power on CCl 4 conversion have been studied. The conversion of CCl 4 was high in all cases reaching a maximum of 90%. The conversion of tetrachloromethane decreased with increasing initial concentration of CCl 4 in the reaction mixture. Changing the gas flow rate from 1000 Nl h -1 to 1400 Nl h -1 decreased the conversion of tetrachloromethane.

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Electron beam and pulsed corona processing of carbon tetrachloride in atmospheric pressure gas streams

Cited by 69 publications

References 21 publications

Decomposition of dichloromethane and in situ alkali absorption of resulting halogenated products by a packed-bed non-thermal plasma reactor

Decomposition of dichloromethane and in situ alkali absorption of resulting halogenated products by a packed-bed non-thermal plasma reactor

Decomposition of greenhouse gases by plasma

Conversion of tetrachloromethane in large scale gliding discharge reactor

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