Pulsed corona for gas and water treatment

Heesch, E.J.M. van; Smulders, Hwm; Paasen, S.V.B. van; Blom, P.P.M.; Gompel, F.M. van; Staring, A.J.P.M.; Ptasiński, K.J.

doi:10.1109/ppc.1997.679285

Cited by 15 publications

(5 citation statements)

References 3 publications

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“…Investigations of lengthwise streamer propagation in a coaxial electrode were also done [17,65,66]. Figure 21 shows ICCD images of streamer development over time for (a) a 5 ns positive (top) and negative (bottom) pulse and (b) a 9 ns positive (top) and negative (bottom) pulse in a 2 m reactor [17].…”

Section: Effect Of Voltage Polarities On Nanosecond Pulse Discharge P...mentioning

confidence: 99%

Nanosecond pulsed streamer discharges: II. Physics, discharge characterization and plasma processing

Wang

Namihira

2020

Plasma Sources Sci. Technol.

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Nanosecond pulsed streamer discharge has unique characteristics that differentiate it from longer discharges. The very fast voltage rise time, peak voltage plateau, short pulse duration, and fast fall time enable a large volume of uniform nonthermal plasma generation at atmospheric pressure. This review explains the physics of nanosecond discharge plasma through experimental and simulated studies for plasma processing techniques. The following are discussed and compared between sub-microsecond and nanosecond discharge plasma: discharge phase transition, discharge propagation, production of chemically active species, temperature change of gas during plasma propagation, electrode geometry, effect of voltage rise rate, voltage polarities, and N 2 /O 2 gas composition ratio in air seeding gas. Nanosecond pulse discharge plasma is characterized by a considerably faster streamer head propagation velocity and reduced gas heating, resulting in a higher energy efficiency for plasma processing. Ozone generation, nitric oxide treatment and volatile organic compound treatment results are given as examples of plasma processing.

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Section: Effect Of Voltage Polarities On Nanosecond Pulse Discharge P...mentioning

confidence: 99%

Nanosecond pulsed streamer discharges: II. Physics, discharge characterization and plasma processing

Wang

Namihira

2020

Plasma Sources Sci. Technol.

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“…Although, ammonia-catalytic De-NO x methods are used for the removal of NO x emitted from thermal power plants, both their initial and the running costs are very high. On the other hand, it has been found that discharge plasmas can decompose volatile organic gases, nitrogen oxides, and sulfur oxides. − Therefore, pulsed corona discharge has been widely investigated as a promising technique because of its simultaneous removal of NO x and SO 2 , low capital and operating costs, and more efficient energy conversion. − Recently, there have been a number of studies reported regarding the desulfurization and denitrification via pulsed corona discharge. The researchers found that the conversion efficiencies of NO and SO 2 are affected by many factors, such as pulse peak voltage, pulse frequency, gas flow rate, reactor length, input energy per unit volume of flue gas, etc. − …”

Section: Sorbent For the Removal Of Air Pollutantsmentioning

confidence: 99%

Application of Coal Fly Ash in Air Quality Management

Ahmaruzzaman

Gupta

2012

Ind. Eng. Chem. Res.

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Although, coal fly ash is recognized as an environmental pollutant, it can be used for the removal of various gaseous pollutants under controlled conditions. A lot of work has been conducted worldwide for the utilization of fly ash for various applications. It has been found from the literature that fly ash possesses potential application in the management of air quality. The literature data revealed that fly ash can be utilized for the removal of NO x , SO x , mercury, and other gaseous pollutants from air and other sources. Fly ash can be used as a promising sorbent for the removal of various types of air pollutants; however, further research need to be taken in the laboratory and pilot plant scale. It is also indicated that fly ash contained approximately 10−12% of unburned component and these unburned components may have an important role in their removal capacity. In this article, the application of fly ash in the removal of SO x , NO x , mercury, gaseous organics, and other impurities have been discussed and some guidelines have been highlighted for their potential application.

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“…In the present work, the applied voltage from the Blumlein line generator to the reactor was measured using a resistive divider (1 /10 k ), which was connected between the central electrode of the reactor and the ground. The positive polarity of the applied voltage was used, as it was more effective than the negative polarity [1], [6]. The discharge current in the reactor was measured Electronics, USA), which was located on the return current to the ground.…”

Section: Experimental Set-up and Proceduresmentioning

confidence: 99%

Influence of gas flow rate and reactor length on NO removal using pulsed power

Namihira

Tsukamoto

Wang

et al. 2001

IEEE Trans. Plasma Sci.

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A short duration of 100-ns pulsed power has been used to remove nitric oxide (NO) in a mixture of nitrogen, oxygen, water vapor, and NO, simulating flue gases from a power station. The effects of the gas flow rate, the reactor length, and the pulse repetition rate on the percentage of NO removal and its energy efficiency are reported. The percentage of NO removal at a fixed gas flow rate increased with increasing pulse repetition rate due to the increased energy into the discharge. At a fixed pulse rate, the removal of NO increased with decreasing gas flow rate due to the increased residence time of the gas in the discharge reactor, thus facilitating the creation of increased radicals of O and N which then decreased NO. The energy removal efficiency of NO (in mol/kWh) decreased with increasing gas flow rate and increasing removal ratio of NO. The removal of NO increased with increasing energy density (J/l) input into the discharge at different reactor length.

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Pulsed corona for gas and water treatment

Cited by 15 publications

References 3 publications

Nanosecond pulsed streamer discharges: II. Physics, discharge characterization and plasma processing

Nanosecond pulsed streamer discharges: II. Physics, discharge characterization and plasma processing

Application of Coal Fly Ash in Air Quality Management

Influence of gas flow rate and reactor length on NO removal using pulsed power

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