An energy-consumption and byproduct-generation analysis of the discharge nonthermal plasma-chemical NO-reduction process

Gal, Arkadiy; Kurahashi, Masato; Kuzumoto, Masaki

doi:10.1088/0022-3727/32/10/313

Cited by 27 publications

(18 citation statements)

References 30 publications

(85 reference statements)

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“…The NTP technique has been employed successfully for the destruction of various toxic VOCs like chlorinated and fluorinated hydrocarbons [10][11][12], inorganic pollutants such as SO 2 , H 2 S and NO x [13][14][15][16][17] and also aliphatic [18][19][20] and aromatic hydrocarbons [2,3,[20][21][22][23][24]. In the later case the total oxidation to CO 2 and H 2 O is desired, but generally this aim is not achieved.…”

Section: Introductionmentioning

confidence: 99%

Catalytic abatement of volatile organic compounds assisted by non-thermal plasma

Subrahmanyam

Măgureanu

Renken

et al. 2006

Applied Catalysis B: Environmental

182

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A novel catalytic reactor with dielectric barrier discharge (DBD) at atmospheric pressure was developed for the abatement of volatile organic compounds (VOCs). The novelty of DBD reactor is the metallic catalyst serving also as the inner electrode. The catalytic electrode was prepared from sintered metal fibers (SMF) in the form of a cylindrical tube. Oxides of Mn and Co were deposited on SMF by impregnation. Decomposition of toluene taken as the model VOC compound (<1000 ppm in air) was investigated. The catalyst composition, toluene concentration, applied voltage and frequency were systematically varied to evaluate the performance of the DBD reactor. At 100 ppm of toluene, the conversion $100% was achieved in the DBD reactor using a specific input energy (SIE) $ 235 J/l independently of the chemical composition of the SMF catalytic electrode, but the selectivity to CO 2 was observed to be a function of the catalyst composition. The MnO x /SMF catalytic electrode showed the best performance towards total oxidation. At a SIE of 295 J/l, the selectivity to CO 2 was 80% with 100% conversion of toluene. No carbon solid residues were deposited on the electrode. #

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Section: Introductionmentioning

confidence: 99%

Catalytic abatement of volatile organic compounds assisted by non-thermal plasma

Subrahmanyam

Măgureanu

Renken

et al. 2006

Applied Catalysis B: Environmental

182

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“…Important contributions are as follows: plasma-catalyst with hydrocarbon (aldehyde) injection method [20,21], plasma-SCR with urea injection method [22], oil droplet plasma injection system [23,24] that was already in the stage of a truck demonstration test stage, silent discharge plasma system for the exhaust of 100 kVA diesel engine generator [25], corona radical shower system with higher energy efficiency [26] and nitrogen gas reduction with ultra small gap plasma reactor [27]. However, large consumption of plasma electric energy is required in these systems because the plasma must be always turned on during the aftertreatment.…”

Section: Introductionmentioning

confidence: 99%

Total Diesel Emission Control Technology Using Ozone Injection and Plasma Desorption

Okubo

Arita

Kuroki

et al. 2008

Plasma Chem Plasma Process

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An innovative total diesel emission control system for diesel particulate and NOx simultaneous reduction is proposed. In this system, the plasma reactor is located outside the emission exhaust pipe and activated gas induced from ozone activated by the plasma is injected into the exhaust pipe. On the other hand, the NOx reduction is achieved using oxygen-poor nonthermal plasma desorption. The concentration of oxygen can be changed either by controlling the incineration state of the engine or by injecting oxygenpoor gas. Experiments are carried out for the emission of small diesel engine generator and high performance is demonstrated. The effective or apparent required plasma energy can be decreased further using this system because of the periodic or intermittent application of the plasma. In the present study, the excellent reduction energy efficiencies of 6.6 g/kWh for PM and 16 g (NO 2 )/kWh for NOx are achieved.

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“…A lot of studies have been devoted to plasmas generated by dielectric barrier [11,12,15,18,[20][21][22][23][24][25][26][27][28][29][30][31] (DBD) or corona [13,14,16,17,19,24,[32][33][34][35][36][37][38][39][40][41][42] discharges, without a catalyst, in dry or wet oxygen-rich gas mixtures containing traces of NO, and with [12-19, 23, 27-31, 42] or without [11, 20-22, 24-26, 32-41] hydrocarbon additives. Such discharges are strongly non-homogeneous with many plasma micro-filaments following the propagation of streamers in the inter-electrode volume [43,44].…”

Section: Introductionmentioning

confidence: 99%

“…the predicted time evolution of the species involved in reactions(20)(21)(22)) is plotted. The first exited metastable of oxygen O( 1 D), is effectively quenched by collisions.…”

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confidence: 99%

Effect Of Propene, n-Decane, and Toluene Plasma Kinetics on NO Conversion in Homogeneous Oxygen-Rich Dry Mixtures at Ambient Temperature

Lombardi

Blin-Simiand

Jorand

et al. 2007

Plasma Chem Plasma Process

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A photo-triggered discharge is used to study the influence of three hydrocarbons (HCs), propene (C 3 H 6 ), n-decane (C 10 H 22 ), and toluene (C 6 H 5 CH 3 ) on NO conversion in N 2 /O 2 /NO/HC mixtures, with 18.5% O 2 concentration, 700 ppm of NO, and an hydrocarbon concentration ranging between 190 ppm and 2,700 ppm. The electrical system generates a transient homogeneous plasma, working under 400 mbar total pressure, with a 50 ns short current pulse at a repetition frequency up to a few Hz. The NO concentration at the exit of the reactor is quantified using absolute FTIR spectroscopy measurements, as a function of the specific deposited energy in the discharge and the mixture composition. Owing to the plasma homogeneity, the experimental results can be compared to predictions of a self-consistent 0-D discharge and kinetic model based on available data in the literature about reactions and their rate constants. It is shown that the addition of either propene (as for DBD or corona discharges) or n-decane to N 2 /O 2 /NO leads to an improvement of the NO removal as compared to the mixture without hydrocarbon molecules. The adopted kinetic schemes explain this effect for the two mixture types. On the other hand, both the experiments and model predictions emphasize that the addition of toluene does not lead to the improvement of NO conversion. Moreover, compounds that are useful for NO x reduction catalysis, such as aldehydes, are less produced in the mixture with toluene.

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An energy-consumption and byproduct-generation analysis of the discharge nonthermal plasma-chemical NO-reduction process

Cited by 27 publications

References 30 publications

Catalytic abatement of volatile organic compounds assisted by non-thermal plasma

Catalytic abatement of volatile organic compounds assisted by non-thermal plasma

Total Diesel Emission Control Technology Using Ozone Injection and Plasma Desorption

Effect Of Propene, n-Decane, and Toluene Plasma Kinetics on NO Conversion in Homogeneous Oxygen-Rich Dry Mixtures at Ambient Temperature

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