Radiation treatment of exhaust gases—I. Oxidation of NO and reduction of NO2

Tokunaga, Okihiro; Nishimura, Koichi; Machi, Sueo; Washino, Masamitsu

doi:10.1016/0020-708x(78)90027-3

Cited by 33 publications

(4 citation statements)

References 13 publications

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“…One alternative to SCR, TWC, and NSR processes that has been studied since the 1970s is nonthermal plasma oxidation of NO with electron beams. 4 Nonthermal plasma (NTP) is a high reactive system consisting of ions, electrons, radicals, and excited state neutrals with a temperature of approximately 300 K. Competition with the conventional technologies for DeNO x has motivated a long history of research and development effort to improve the product yield and energy efficiency of the NTP chemical process.…”

Section: Introductionmentioning

confidence: 99%

“…Selective catalytic reduction (SCR) for combustion processes, three-way catalysts (TWC) for conventional gasoline engines, and NOx storage and reduction (NSR) for lean burn engines are the most popular technologies of NO reduction, which require typical catalysts and a quantitative reducing agent. One alternative to SCR, TWC, and NSR processes that has been studied since the 1970s is nonthermal plasma oxidation of NO with electron beams . Nonthermal plasma (NTP) is a high reactive system consisting of ions, electrons, radicals, and excited state neutrals with a temperature of approximately 300 K. Competition with the conventional technologies for DeNO x has motivated a long history of research and development effort to improve the product yield and energy efficiency of the NTP chemical process.…”

Section: Introductionmentioning

confidence: 99%

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Products Yield and Energy Efficiency of Dielectric Barrier Discharge for NO Conversion: Effect of O₂ Content, NO Concentration, and Flow Rate

Wang

Tang

et al. 2017

Energy Fuels

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Nonthermal plasma (NTP) used for NO removal has been studied for a long time, but how to achieve the desired product with lower energy consumption is still a barrier for its industrial application. Dielectric barrier discharge (DBD) energized via an AC power supply was used to generate NTP. Energy cost (EC, MJ/mol) and product measurements were performed to reveal the effect of O2 content, NO concentration, flow rate, and specific energy density (SED, J/L) on the performance of DBD. The products (NO, NO2, N2O, and O3) of different SEDs were experimentally measured at 303 ± 2 K. On the basis of the variation of products with the change in SED, the possible dominant plasma reaction and corresponding species were discussed. The dominant reaction of DBD processes can be categorized into oxidation, reduction, and product reactions with increasing SED from 400 to 3500 J/L. Lower SED and higher O2 content are beneficial for the conversion of NO to NO2 and O2 to O3. The O atoms and temperature play a significant role in the interconversion of NO and NO2. A limitless increase in SED will reduce the conversion of both NO to NO2 and NO to N2 due to the product’s reaction with O and N atoms, respectively. The N2O was observed in all DBD systems with the feeding of N2/O2.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Products Yield and Energy Efficiency of Dielectric Barrier Discharge for NO Conversion: Effect of O₂ Content, NO Concentration, and Flow Rate

Wang

Tang

et al. 2017

Energy Fuels

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“…Another method of generating electrons to initiate chemical reactions, developed to overcome the problems associated with the corona discharge method for NO x and SO x control, is the electron beam (E-beam) process. Extensive studies have been performed by several workers. − …”

Section: Introductionmentioning

confidence: 99%

Nitrogen Oxide Decomposition by Barrier Discharge

McLarnon

Mathur

2000

Ind. Eng. Chem. Res.

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Experiments were conducted in a benchtop apparatus and a process development unit. The parameters investigated included applied voltage, frequency, packing, the chemical composition of the gas stream, and flow conditions in the barrier discharge reactor. Experimental results showed that conversion of nitric oxide increased to greater than 85% as the peak voltage was increased from 7 to 15 kV. Similarly, conversion increased to greater than 95% as frequency was increased from 60 to 1000 Hz. Products of the reactions leading to nitric oxide destruction were nonpolluting nitrogen and oxygen when a dry mixture of NO and N 2 was used as inlet gas. Addition of oxygen and carbon dioxide lowered the NO x conversion. Nitric acid was produced when the gas stream contained water vapor. Results of this work have the potential to establish the foundation for a nitrogen oxides control technology that may be technically and economically feasible.

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“…One alternative to SCR and SNCR processes that has been studied since the 1970s is gas-phase plasma oxidation of NO with electron beams (10). The basis of this method is to initially generate gas-phase radicals, such as O, OH, and H02 by electron impact excitation and ionization.…”

Section: Introductionmentioning

confidence: 99%

Gas-phase removal of nitric oxide from gas streams via dielectric barrier discharges

Chang¹,

Kushner²,

Rood³

1992

Environ. Sci. Technol.

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Radiation treatment of exhaust gases—I. Oxidation of NO and reduction of NO2

Cited by 33 publications

References 13 publications

Products Yield and Energy Efficiency of Dielectric Barrier Discharge for NO Conversion: Effect of O₂ Content, NO Concentration, and Flow Rate

Products Yield and Energy Efficiency of Dielectric Barrier Discharge for NO Conversion: Effect of O₂ Content, NO Concentration, and Flow Rate

Nitrogen Oxide Decomposition by Barrier Discharge

Gas-phase removal of nitric oxide from gas streams via dielectric barrier discharges

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Radiation treatment of exhaust gases—I. Oxidation of NO and reduction of NO2

Cited by 33 publications

References 13 publications

Products Yield and Energy Efficiency of Dielectric Barrier Discharge for NO Conversion: Effect of O2 Content, NO Concentration, and Flow Rate

Products Yield and Energy Efficiency of Dielectric Barrier Discharge for NO Conversion: Effect of O2 Content, NO Concentration, and Flow Rate

Nitrogen Oxide Decomposition by Barrier Discharge

Gas-phase removal of nitric oxide from gas streams via dielectric barrier discharges

Contact Info

Product

Resources

About

Products Yield and Energy Efficiency of Dielectric Barrier Discharge for NO Conversion: Effect of O₂ Content, NO Concentration, and Flow Rate

Products Yield and Energy Efficiency of Dielectric Barrier Discharge for NO Conversion: Effect of O₂ Content, NO Concentration, and Flow Rate