Enhancement of electron beam denitrization process by means of electric field

Masuda, S.; Hirano, Mari; Akutsu, Katsumi

doi:10.1016/0146-5724(81)90335-6

Cited by 30 publications

(5 citation statements)

References 2 publications

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“…After completing the nanosecond pulse power supply and the circuit technologies for an effective use of the pulse, the author and co-workers started ( 1 ) DeNOx and DeSOx tests in laboratory and an incineration plant, (2) tests of mercury vapour control at the incineration plant, and ( 3 ) ozone production test in laboratory. Based on these test results theoretical considerations were also made on the mechanism of the pulse corona induced plasma chemical process (PPCP).…”

Section: Introductionmentioning

confidence: 99%

Pulse corona induced plasma chemical process: a horizon of new plasma chemical technologies

Masuda¹

1988

Pure and Applied Chemistry

112

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-A very intense corona discharge can be produced by applying a sharp rising, narrow pulse high voltage between corona and counter electrodes of a corona system. Because of an extremely increased spark voltage electrons are highly accelerated even under ordinary gas pressure, while ions with much larger mass are not effectively accelerated as a resuLt of too short pulse duration time. Hence, a strongly non-equilibrium plasma with a high electron temperature and low ion and molecular temperatures is produced. A number of gas phase reactions, such as DeNOx, DeSOx and control of hazardous and toxic gaseous pollutants like iercury vapour from incineration plants, can be effectively realized, where the pollutants are converted into solid aerosol particles, with or without additive agents like ammonia, to be easily removed in downstream precipitators. This also opens a new way of producing ultra-fine particles of various exhotic materials. Treatment and dry processing of various surfaces under ordinary pressure (and also reduced or increased pressures) are also possible.

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Section: Introductionmentioning

confidence: 99%

Pulse corona induced plasma chemical process: a horizon of new plasma chemical technologies

Masuda¹

1988

Pure and Applied Chemistry

112

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“…Oxidizing radicals such as OH, H0 2, and 0, are produced in the energy transfer process from incident radiation to the molecules of the system. Chang and Masuda (1988) proposed that ion-molecule reactions, radical reactions and chemical reactions on the aerosol surface are as important as OH radical reactions, since the removal of NOx is significantly influenced by an electric field (Masuda et al, 1981) and by corona discharge induced plasma injections (Masuda and Nakao, 1990). The reactions of NO x and S02 with the oxidizing radicals yield nitric, sulfuric, nitrosylsulfuric, and nitryl sulfuric acid aerosol particles.…”

Section: Ii) Electron-beam-induced Plasma Techniquesmentioning

confidence: 99%

Removal of NO_xfrom Flue Gas by Reburning with Plasma Activated Natural Gas: Review and Economics

Bartoszek

Vasquez

et al. 1998

Combustion Science and Technology

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By initiating chain reactions that consume NO x , CHj radicals play an important role in natural gas rebuming. In conventional reburning, most of the methane is consumed in reactions with oxygen to fonn CO, and does not produce CHi radicals as intermediate products, which limits NO reduction efficiency. Activating natural gas externally to the boiler may generate a mixture of CHi radicals by passing CH. through a discharge before injection into the rebuming zone. Five activation technologies are reviewed: microwave heating and discharge plasmas, electron beam irradiation-induced plasmas, corona discharge induced plasmas, and thermal plasmas. Wall, cyclone and tangentially fired boilers were considered in the economic assessment. From preliminary capital and operating cost estimates, pulse corona and electron beam techniques appear to be the most promising activation techniques.

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“…Positive dc or pulse voltage was applied to the rod-to-plate electrode to enhance the electron-beam dose [7]. With dc voltage Vdc = + 33 kV, the SO2 penetration decreased from 46 percent (electron beam only) to 36 percent, and with pulse voltage Vp = + 45 kV the penetration decreased to 25 percent.…”

Section: So2 Removal Experimentsmentioning

confidence: 99%

A Method for the Removal of Sulfur Dioxide from Exhaust Gas Utilizing Pulsed Streamer Corona for Electron Energization

Mizuno

Clements

Davis

1986

IEEE Trans. on Ind. Applicat.

184

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The performance of a new method using pulsed streamer corona for the removal of SO2 from humid air has been evaluated. The pulsed streamer corona produces energetic free electrons that excite, dissociate, and ionize gas molecules, forming radicals that enhance the gas-phase chemical reactions that convert SO2 to acid mist and/or particulate aerosols. The aerosols are then collected by conventional means, i.e., by electrostatic precipitator or bag filter. The SO2 removal efficiency was compared with that of the electron-beam and dc corona flue-gas treatment processes. The comparison demonstrates the advantage of the novel method.

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Enhancement of electron beam denitrization process by means of electric field

Cited by 30 publications

References 2 publications

Pulse corona induced plasma chemical process: a horizon of new plasma chemical technologies

Pulse corona induced plasma chemical process: a horizon of new plasma chemical technologies

Removal of NO_xfrom Flue Gas by Reburning with Plasma Activated Natural Gas: Review and Economics

A Method for the Removal of Sulfur Dioxide from Exhaust Gas Utilizing Pulsed Streamer Corona for Electron Energization

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Enhancement of electron beam denitrization process by means of electric field

Cited by 30 publications

References 2 publications

Pulse corona induced plasma chemical process: a horizon of new plasma chemical technologies

Pulse corona induced plasma chemical process: a horizon of new plasma chemical technologies

Removal of NOxfrom Flue Gas by Reburning with Plasma Activated Natural Gas: Review and Economics

A Method for the Removal of Sulfur Dioxide from Exhaust Gas Utilizing Pulsed Streamer Corona for Electron Energization

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Removal of NO_xfrom Flue Gas by Reburning with Plasma Activated Natural Gas: Review and Economics