Advanced oxidation processes using pulsed streamer corona discharge in water

Sugiarto, Anto Tri; Ohshima, Takayuki; Sato, Masayuki

doi:10.1016/s0040-6090(02)00036-6

Cited by 113 publications

(67 citation statements)

References 10 publications

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“…This manuscript is however, focused on energy yields of these plasmas. The well-known example of plasma in water is pulsed corona discharges in water [24], which is used as a reference in this study for estimating relative energy efficiencies of the rest of the plasma reactors. High-energy electrons (e*) in the plasma produce reactive free radicals by reactions such as [43,44] …”

Section: Discussionmentioning

confidence: 99%

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Water Purification by Plasmas: Which Reactors are Most Energy Efficient?

Malik

2009

Plasma Chem Plasma Process

362

177

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Decomposition of toxic organic compounds is a major environmental problem. Increasingly, research is being conducted to use plasmas to decompose these wastes in water, as it is simple, effective and does not require the addition of other chemical agents. Different groups have used varied reactor designs. This study calculates and compares relative energy yields of about 27 major types of plasma reactors. The results reveal dramatic differences in the energy yields, up to five orders of magnitude. The most efficient are pulse powered reactors, in which plasma is formed in gas phase and the waste solution sprayed into it. Factors that account for this improved energy yield are discussed. This study will help narrow down efficient reactors for further studies, development and commercial uses.

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Section: Discussionmentioning

confidence: 99%

“…Free radicals react with the toxic organic compounds (RH), their intermediates (R • ) or with each other through reaction such as the following [24] Initial reaction rates for the formation of • OH and H 2 O 2 have been described in literature [45,46]. Highly reactive free radicals are lost during production of species like H 2 O 2 .…”

Section: Discussionmentioning

confidence: 99%

Water Purification by Plasmas: Which Reactors are Most Energy Efficient?

Malik

2009

Plasma Chem Plasma Process

362

177

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“…H 2 O 2 has strong oxidizing properties. Additionally, it is used in advanced oxidation processes using discharge in water since it can enhance the efficiency of decomposition of organic pollutants in contaminated water [39]. It must be mentioned that experiments with pure oxygen or pure methane with liquid-water injection do not produce H 2 O 2 , indicating that H 2 O 2 is produced during methane oxidation: It is very unlikely that H 2 O 2 formation occurs via reactions (7) and …”

Section: Partial Oxidation Of Methane To Liquid Oxygenates In the Plamentioning

confidence: 99%

Gas-to-liquids process using multi-phase flow, non-thermal plasma microreactor

Agiral

Nozaki

Nakase

et al. 2011

Chemical Engineering Journal

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“…From optical emission spectroscopy, emission lines of H α (656 nm), H β (486 nm), O I (777 nm) and OH (~309 nm) were observed [5]. Like the cases of earlier plasma treatment studies in aqueous solutions, results of the optical emission spectroscopy suggests that several water molecules at plasma-liquid interfaces are activated by energetic electron and H, O and hydroxyl radicals (OH) from water (H 2 O) vapor are produced [8][9][10][11][12].…”

Section: Resultsmentioning

confidence: 98%

Refractory Organic Solute Decomposition in Water using Microwave Plasma

Ishijima

Saito

Sugihara

et al. 2011

Trans. Mat. Res. Soc. Japan

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Microwave excited plasma source with slot antenna in water is a novel plasma applicable to materials processing in liquid. In order to apply this microwave plasma source to a practical use for solute decomposition, it is necessary to evaluate the decomposition efficiency for refractory organic solutes and understand the decomposition process of solution as well. In this paper, the microwave plasma treatment was demonstrated through decomposition of refractory organic solutes such as acetic acid, polyvinyl alcohol (PVA), and 4-chloro-2-methylphenoxy acetic acid (MCPA) in aqueous solutions. Total organic carbon concentration and high-performance liquid chromatography measurements revealed that the refractory organic substances such as acetic acid, PVA, and MCPA were decomposed by microwave plasma. Intermediate products of MCPA were investigated by gas chromatography coupled to a mass spectrometry and ion chromatograph during MCPA degradation using microwave excited plasma.

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Advanced oxidation processes using pulsed streamer corona discharge in water

Cited by 113 publications

References 10 publications

Water Purification by Plasmas: Which Reactors are Most Energy Efficient?

Water Purification by Plasmas: Which Reactors are Most Energy Efficient?

Gas-to-liquids process using multi-phase flow, non-thermal plasma microreactor

Refractory Organic Solute Decomposition in Water using Microwave Plasma

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