Bipolar pulsed electrical discharge for decomposition of organic compounds in water

Baroch, Pavel; Anita, V.; Saito, Nagahiro; Takai, Osamu

doi:10.1016/j.elstat.2008.01.010

Cited by 78 publications

(31 citation statements)

References 20 publications

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“…It covers 27 different versions of plasma reactors. A few exceptions, such as micro-hollow cathode discharges [36], bi-polar pulsed discharges in water [37], and electrohydraulic discharges [38], could not be included in this analysis due to non-availability of comparable data. Being relatively new, their energy efficiency is expected to improve as they are developed further in future.…”

Section: Resultsmentioning

confidence: 98%

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

Malik

2009

Plasma Chem Plasma Process

349

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: Resultsmentioning

confidence: 98%

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

Malik

2009

Plasma Chem Plasma Process

349

177

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“…eoretically, increasing the U D values will enhance the field strength difference between the two ends of the gap, accelerating the water ionization and gasification velocity [32]. en, an ionization avalanche is started, increasing the growth speed of the main plasma channel and decreasing the T B values during the discharge process.…”

Section: Relationship Between U D and Wsw Propertiesmentioning

confidence: 99%

Experimental Study of Pulsed Discharge Underwater Shock‐Related Properties in Pressurized Liquid Water

Bian

Dong

Zhao

et al. 2018

Advances in Materials Science and Engineering

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Engineering background of hydraulic fracturing is applied to improve the permeability of unconventional gas wells, such as coal seams and shale gas wells, by a pulsed discharge mechanism. We studied the general relations between water shock wave properties (the maximum pressure, wave velocity, and energy conversion efficiency), the discharge voltage, and hydrostatic pressure during high-voltage pulsed discharge experiments in pressurized liquid water. e following observations were made: (1) when the discharge voltage increased from 7 kV to 13 kV, the maximum pressure increased from 12.6 MPa (hydrostatic pressure P H � 12 MPa) to 40 MPa (P H � 6 MPa), wave velocity increased from 1418 m/s (P H � 12 MPa) to 1454 m/s (P H � 6 MPa), and energy conversion efficiency increased from 9% to 11%, and (2) when hydrostatic pressure increased from 0 MPa to 12 MPa, the maximum pressure and wave velocity augmented and then diminished slowly (the critical hydrostatic pressure occurs in the 3 to 6 MPa range), whereas the change of energy conversion efficiency was not obvious. eir properties are explained by the variation of electrical parameters during the pulsed discharge.

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“…The application of LPP to a reactant solution is usually based on a spark discharge or a streamer discharge. When a spark discharge is used in the production of an electrical field, various free radicals, ozone and oxygen bubbling, overpressure shock waves, and strong ultraviolet radiation occur [28]. The production of activated chemical species in liquid solutions, such as hydroxyl radical, hydrogen peroxide and ozone, has been observed using a streamer corona pulsed discharge [29].…”

Section: Resultsmentioning

confidence: 99%

Facile synthesis of bimetallic Ni-Cu nanoparticles using liquid phase plasma method

Sun¹,

Jung

2016

Korean J. Chem. Eng.

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A liquid phase plasma (LPP) process was used to synthesize of Ni-Cu bimetallic particles in aqueous solution. The bimetallic particles were well separated, and the particle size increased with increasing LPP process duration, causing these bimetallic particles to be well separated as the particle size increased when the LPP process time increased. The earliest stages of LPP formed dendrite-shaped nanoparticles, while spherical particles were generated in the later stages. While spherical Ni-Cu bimetallic nanoparticles were mostly observed in the initial stage, flower-like shaped Ni-Cu bimetallic nanoparticles were mostly observed after longer durations of plasma treatment. The solution pH decreased with increasing LPP process time.

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Bipolar pulsed electrical discharge for decomposition of organic compounds in water

Cited by 78 publications

References 20 publications

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

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

Experimental Study of Pulsed Discharge Underwater Shock‐Related Properties in Pressurized Liquid Water

Facile synthesis of bimetallic Ni-Cu nanoparticles using liquid phase plasma method

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