A Facile Approach for Direct Decomposition of Nitrous Oxide Assisted by Non‐Thermal Plasma

Mahammadunnisa, Shaik; Reddy, E. Linga; Reddy, P. Manoj Kumar; Subrahmanyam, Ch.

doi:10.1002/ppap.201200114

Cited by 16 publications

(15 citation statements)

References 47 publications

(53 reference statements)

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“…Inserting observation on metal oxides integration to plasma is the increased selectivity towards total oxidation (CO 2 ) for the range of CB concentration studied. This increase is significant when SMF modified with MnO x , which may be due to the formation of a strong oxidizing agent, atomic oxygen by in situ decomposition of ozone . A similar observation was made at 530 J L −1 (Figure S1, Supporting Information) that confirmed the fact that increasing concentration decreases the conversion.…”

Section: Resultssupporting

confidence: 75%

“…During the recent years, non‐thermal plasma (NTP) assisted removal of contaminants has been receiving great attention due to the specific advantageous like short reaction duration, ambient reaction conditions, etc. During the NTP treatment, majority of the supplied energy will be utilized for creating energetic electrons and almost no energy is wasted in heating the flue gas . However, NTP is non‐selective and may lead to the formation of undesired by‐products such as CO, CO 2 , and NO x .In order to overcome these limitations, catalytic plasma approach has been proposed …”

Section: Introductionmentioning

confidence: 99%

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Catalytic Non‐Thermal Plasma Reactor for Decomposition of Dilute Chlorobenzene

Karuppiah

Reddy

et al. 2013

Plasma Processes & Polymers

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Oxidative decomposition of low concentrations of chlorobenzene (CB) in air was carried out in a NTP reactor. Typical results indicated the better performance on addition of metal oxide catalysts in plasma zone. It may be concluded that catalytic plasma approach has promise, especially for the removal of low concentraions of CB, where conventional techniques are not energetically feasible. Among the metal oxides studied, AgOx/MnOx showed the better performance than MnOx and CoOx. During the removal of 50 ppm of CB, AgOx/MnOx under humid conditions showed 100% selectivity to total oxidadtion at 260 J L−1, which may be assigned due to the formation of hydroxyl radical and/or due to in situ ozone decomposition on the catalyst surface that may lead to the formation of a powerful oxidant atomic oxygen.

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Section: Resultssupporting

confidence: 75%

Section: Introductionmentioning

confidence: 99%

Catalytic Non‐Thermal Plasma Reactor for Decomposition of Dilute Chlorobenzene

Karuppiah

Reddy

et al. 2013

Plasma Processes & Polymers

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“…Dielectric barrier discharges (DBDs) at atmospheric pressure [1][2][3][4] usually occur in the filamentary regime in most gases [5]. These filaments are developed by electron avalanches at high voltage [6].…”

Section: Introductionmentioning

confidence: 99%

Two-dimensional particle-in cell/Monte Carlo simulations of a packed-bed dielectric barrier discharge in air at atmospheric pressure

et al. 2015

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The plasma behavior in a parallel-plate dielectric barrier discharge (DBD) is simulated by a twodimensional particle-in-cell/Monte Carlo collision model, comparing for the first time an unpacked (empty) DBD with a packed bed DBD, i.e., a DBD filled with dielectric spheres in the gas gap. The calculations are performed in air, at atmospheric pressure. The discharge is powered by a pulse with a voltage amplitude of −20 kV. When comparing the packed and unpacked DBD reactors with the same dielectric barriers, it is clear that the presence of the dielectric packing leads to a transition in discharge behavior from a combination of negative streamers and unlimited surface streamers on the bottom dielectric surface to a combination of predominant positive streamers and limited surface discharges on the dielectric surfaces of the beads and plates. Furthermore, in the packed bed DBD, the electric field is locally enhanced inside the dielectric material, near the contact points between the beads and the plates, and therefore also in the plasma between the packing beads and between a bead and the dielectric wall, leading to values of 4 10 8 V m −1 , which is much higher than the electric field in the empty DBD reactor, i.e., in the order of 2 10 7 V m −1 , thus resulting in stronger and faster development of the plasma, and also in a higher electron density. The locally enhanced electric field and the electron density in the case of a packed bed DBD are also examined and discussed for three different dielectric constants, i.e., 22 r  = (ZrO 2 ), 9 r  = (Al 2 O 3 ) and 4 r  = (SiO 2 ). The enhanced electric field is stronger and the electron density is higher for a larger dielectric constant, because the dielectric material is more effectively polarized. These simulations are very important, because of the increasing interest in packed bed DBDs for environmental applications.

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“…Non‐thermal plasma (NTP) in aqueous media is considered to be one of the advanced oxidation process; where discharges at gas–liquid interface may produce strong oxidants like hydroxyl radical that are capable of mineralizing the pollutant. It has been reported that NTP operated in dielectric barrier discharge (DBD) configuration may produce UV radiation, shock waves, ions (H + , H 3 O + , O + , H − , O − , OH − , O 2 − ), molecular species (H 2 , O 3 , H 2 O 2 ), and most importantly reactive radicals (such as O • , H • ,OH • ) . Hydroxyl radicals produced at air–water interface may also produce hydrogen peroxide .…”

Section: Introductionmentioning

confidence: 99%

Mineralization of Phenol in Water by Catalytic Non‐Thermal Plasma Reactor – An Eco‐Friendly Approach for Wastewater Treatment

Reddy

Dayamani

Mahammadunnisa

et al. 2013

Plasma Processes & Polymers

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Degradation of phenol in water was examined in a non‐thermal plasma reactor combined with CeO2, Fe2O3/CeO2, and ZrO2/CeO2 catalysts. Plasma reactor was operated in a dielectric barrier discharge configuration, whereas, catalysts were characterized by XRD, BET, and Raman spectroscopy. The effect of applied voltage, phenol concentration and catalyst addition was studied. Typical results indicated that the degradation efficiency increases with increasing voltage, whereas, the best energy yield was obtained at lower applied voltage. Total organic carbon analyzer confirmed the mineralization of phenol, which was further enhanced by the catalyst addition up to 47.3%. The intermediate compounds formed during the plasma decomposition were identified by gas chromatography mass spectrometry (GC–MS).

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A Facile Approach for Direct Decomposition of Nitrous Oxide Assisted by Non‐Thermal Plasma

Cited by 16 publications

References 47 publications

Catalytic Non‐Thermal Plasma Reactor for Decomposition of Dilute Chlorobenzene

Catalytic Non‐Thermal Plasma Reactor for Decomposition of Dilute Chlorobenzene

Two-dimensional particle-in cell/Monte Carlo simulations of a packed-bed dielectric barrier discharge in air at atmospheric pressure

Mineralization of Phenol in Water by Catalytic Non‐Thermal Plasma Reactor – An Eco‐Friendly Approach for Wastewater Treatment

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