Corona induced non-thermal plasmas: Fundamental study and industrial applications

Yan, Keping; Hu, Hui; Cui, M.; Miao, Jinsong; Wu, Xiaoqiang; Bao, Chongguang; Li, Ruinian

doi:10.1016/s0304-3886(98)00019-9

Cited by 91 publications

(39 citation statements)

References 14 publications

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“…There are many industrial applications involving the utilization of corona discharge, such as NO x and SO x reduction in flue gas, toxic compound destruction, and ozone production [15][16][17]. From literature review, the combination of corona discharge and heterogeneous catalysts has been used for many applications [18][19][20][21][22][23][24][25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Ethylene Epoxidation over Alumina-Supported Silver Catalysts in Low-Temperature AC Corona Discharge

Chavadej

Tansuwan

Sreethawong

2008

Plasma Chem Plasma Process

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In this paper, the epoxidation of ethylene over different catalysts-namely Ag/(low-surface-area, LSA)a-Al 2 O 3 , Ag/(high-surface-area, HSA)c-Al 2 O 3 , and Au-Ag/ (HSA)c-Al 2 O 3 -in a low-temperature corona discharge system was investigated. In a comparison among the studied catalysts, the Ag/(LSA)a-Al 2 O 3 catalyst was found to offer the highest selectivity for ethylene oxide, as well as the lowest selectivity for carbon dioxide and carbon monoxide. The selectivity for ethylene oxide increased with increasing applied voltage, while the selectivity for ethylene oxide remained unchanged when the frequency was varied in the range of 300-500 Hz. Nevertheless, the selectivity for ethylene oxide decreased with increasing frequency beyond 500 Hz. The optimum Ag loading on (LSA)a-Al 2 O 3 was found to be 12.5 wt.%, at which a maximum ethylene oxide selectivity of 12.9% was obtained at the optimum applied voltage and input frequency of 15 kV and 500 Hz, respectively. Under these optimum conditions, the power consumption was found to be 12.6 9 10 -16 W s/molecule of ethylene oxide produced. In addition, a low oxygen-to-ethylene molar ratio and a low feed flow rate were also experimentally found to be beneficial for the ethylene epoxidation.

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Section: Introductionmentioning

confidence: 99%

Ethylene Epoxidation over Alumina-Supported Silver Catalysts in Low-Temperature AC Corona Discharge

Chavadej

Tansuwan

Sreethawong

2008

Plasma Chem Plasma Process

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“…Investigations range from odor treatment, indoor air cleaning, volatile organic compound ͑VOCs͒ abatement, and flue gas cleaning to CO 2 conversion and biogas cleaning. [1][2][3] To successfully promote these industrial applications, the availability of highly efficient and reliable high-voltage-pulsed power sources is critical. In previous work, 2,4 we have reported that by using various voltage pulses and/or corona reactors pulsed streamer coronas may develop into two phases, corresponding to primary and secondary streamers.…”

Section: Introductionmentioning

confidence: 99%

“…Optimized relationships among the voltage rise time, the peak voltage, the pulse duration, the size of corona reactor, the output impedance of the highvoltage pulse generator, the stray capacitance of the corona reactor, and the corona energy transfer per unit length of reactor are also discussed. [3][4][5] Most critical elements of the corona-induced plasma system, such as high-voltage switching, transmission line transformer, electrical diagnostics, and costs of the voltage pulse generator are discussed in separate papers. 6,7 A general principle for designing a corona plasma system has been proposed in order to improve the initial radical production and to increase the total energy transfer efficiency.…”

Section: Introductionmentioning

confidence: 99%

A 10 kW high-voltage pulse generator for corona plasma generation

Yan

Heesch

Pemen

et al. 2001

Review of Scientific Instruments

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In this article we discuss a 10 kW high-voltage pulse generator for producing corona-induced plasma. The generator mainly consists of a three-step resonant charging circuit switched by thyristors, a transmission line transformer, and a triggered spark-gap switch. Voltage pulses of 30-100 kV with a rise time of about 20 ns, a pulse duration of 50-250 ns, pulse repetition rate of 1-900 pulses per second, energy of up to 12 J/pulse, and an average power of up to 10 kW have been achieved with a total energy transfer efficiency of about 80%-90%. At each frequency, the deviation of the energy per pulse is around 1.0%. Moreover, the generator has been tested for more than 100 h for both industrial demonstrations and laboratory investigations at an average output power of 1-10 kW.

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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]. The experimental results published in the literature deal mainly with the characterization of the gas mixture composition (concentrations of NO x , hydrocarbons and molecular by-products such as alcohols and aldehydes) at the plasma reactor exit using mainly FTIR spectroscopy and gas chromatography.…”

Section: Introductionmentioning

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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Corona induced non-thermal plasmas: Fundamental study and industrial applications

Cited by 91 publications

References 14 publications

Ethylene Epoxidation over Alumina-Supported Silver Catalysts in Low-Temperature AC Corona Discharge

Ethylene Epoxidation over Alumina-Supported Silver Catalysts in Low-Temperature AC Corona Discharge

A 10 kW high-voltage pulse generator for corona plasma generation

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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