Simultaneous Removal of Polycyclic Aromatic Hydrocarbons and Soot Particles from flue Gas by Gliding arc Discharge Treatment

Du, Ch. M.; Yan, Jian Hua; Li, X. D.; Chéron, B. G.; You, Xiaofang; Chi, Yong; Ni, Mingjiang; Cen, Kefa

doi:10.1007/s11090-006-9033-3

Cited by 31 publications

(15 citation statements)

References 17 publications

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“…These radicals play an important role in the radiation-induced oxidation of SO 2 and NO. The experimental works 18 and theoretical studies 19 confirmed that in humid flue gas, the PAH and BTX decomposition process is initialized by OH radicals. The electron beam irradiation can decrease PAH and BTX concentrations but increases OAH concentration.…”

Section: Resultsmentioning

confidence: 76%

Electron Beam Technology for Multipollutant Emissions Control from Heavy Fuel Oil-Fired Boiler

Chmielewski

Ostapczuk

Lïcki

2010

Journal of the Air & Waste Management Association

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The electron beam treatment technology for purification of exhaust gases from the burning of heavy fuel oil (HFO) mazout with sulfur content approximately 3 wt % was tested at the Institute of Nuclear Chemistry and Technology laboratory plant. The parametric study was conducted to determine the sulfur dioxide (SO2), oxides of nitrogen (NO(x)), and polycyclic aromatic hydrocarbon (PAH) removal efficiency as a function of temperature and humidity of irradiated gases, absorbed irradiation dose, and ammonia stoichiometry process parameters. In the test performed under optimal conditions with an irradiation dose of 12.4 kGy, simultaneous removal efficiencies of approximately 98% for SO2, and 80% for NO(x) were recorded. The simultaneous decrease of PAH and one-ringed aromatic hydrocarbon (benzene, toluene, and xylenes [BTX]) concentrations was observed in the irradiated flue gas. Overall removal efficiencies of approximately 42% for PAHs and 86% for BTXs were achieved with an irradiation dose 5.3 kGy. The decomposition ratio of these compounds increased with an increase of absorbed dose. The decrease of PAH and BTX concentrations was followed by the increase of oxygen-containing aromatic hydrocarbon concentrations. The PAH and BTX decomposition process was initialized through the reaction with hydroxyl radicals that formed in the electron beam irradiated flue gas. Their decomposition process is based on similar principles as the primary reaction concerning SO2 and NO(x) removal; that is, free radicals attack organic compound chains or rings, causing volatile organic compound decomposition. Thus, the electron beam flue gas treatment (EBFGT) technology ensures simultaneous removal of acid (SO2 and NO(x)) and organic (PAH and BTX) pollutants from flue gas emitted from burning of HFO. This technology is a multipollutant emission control technology that can be applied for treatment of flue gas emitted from coal-, lignite-, and HFO-fired boilers. Other thermal processes such as metallurgy and municipal waste incinerators are potential candidates for this technology application.

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Section: Resultsmentioning

confidence: 76%

Electron Beam Technology for Multipollutant Emissions Control from Heavy Fuel Oil-Fired Boiler

Chmielewski

Ostapczuk

Lïcki

2010

Journal of the Air & Waste Management Association

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“…(11), was decomposed by the reactions (Eqs. (14) and (15)), wherein the carbon black was oxidized to CO, CO 2 , and H 2 due to the OH radicals [21].…”

Section: Steam Flow Rate Changementioning

confidence: 99%

Destruction of anthracene using a gliding arc plasma reformer

Chun

Kim

Yoshikawa

2011

Korean J. Chem. Eng.

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The gasification technology for biomass conversion has a limitation for some applications, including engines and turbines, because it produces tar-containing gas. In this study, a gliding arc plasma reformer was developed to remove tar. The plasma discharge in the gliding-type reformer is based on the both non-equilibrium and equilibrium plasmas. A simulation test was conducted using anthracene, which is produced during the gasification of biomass and waste, as the representative tar substance. In the optimal condition, the anthracene decomposition efficiency was 96.1%, and the energy efficiency was 1.14 g/kWh. The higher heating value of the gas produced from the anthracene decomposition was 11,324 kJ/Nm 3 , and the carbon balance was 98%. The steam flow rate, power input, total gas flow rate, and input concentration change were used as variables for the test. The anthracene decomposition efficiency was 81% when the gliding arc plasma reformer was used. When steam was fed at a rate of 0.63 L/min, the decomposition efficiency was highest (96.1%) due to the creation of OH radicals. The energy efficiency was highest (2.63 g/kWh) when the total gas flow rate was 24.1 L/min. H 2 , CO, and CO 2 were produced as reformed gases. At the steam injection rate of 0.37 L/ min or more, carbon black did not appear. Thus, it was verified that the gliding arc plasma reformer is effective for tar reduction.

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“…Due to an adverse effect on the environment and public health, it is of vital importance that the emissions of this compound can be controlled [1,2]. Non-thermal plasmas have shown a strong potential for the reduction of gaseous pollutant emissions such as NO x [3,4], H 2 S [5,6], PAH [7] and VOCs [8,9]. A gliding arc discharge as one of the non-thermal plasma sources, can provide active environments with high electron temperature and low gas temperature.…”

Section: Introductionmentioning

confidence: 99%

“…The above-mentioned studies have provided an in-depth investigation on toluene removal with non-thermal plasma [7][8][9][10][11][12][13][14][15][16][17][18][19]. However, most experimental work focused on the use of sampling methods to measure the concentration of the gas components.…”

Section: Introductionmentioning

confidence: 99%

In-Situ Non-intrusive Diagnostics of Toluene Removal by a Gliding Arc Discharge Using Planar Laser-Induced Fluorescence

Gao

Zhu

Ehn

et al. 2016

Plasma Chem Plasma Process

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A non-equilibrium gliding arc discharge anchored on two diverging stainless steel electrodes was extended into open air by a toluene-containing air jet. The removal process of the toluene by the non-equilibrium gliding arc discharge was investigated through in situ and non-intrusive laser-based techniques. Simultaneous planar laser-induced fluorescence (PLIF) of toluene and OH radicals were employed to achieve on-line visualization of the toluene decomposing process by the gliding arc discharge column. Toluene PLIF images with high spatial and temporal resolution showed that the nonequilibrium plasma of the gliding arc discharge is effective in decomposing toluene molecules. Instantaneous toluene removal efficiency was estimated from the toluene PLIF images, showing that the initial toluene concentrations and oxygen concentrations affected the toluene removal efficiency. The toluene removal efficiency decreased with the initial toluene concentration, whereas the efficiency increased with the oxygen concentration. The OH generation in the discharge was found to be enhanced with an increase of the toluene concentration from the OH PLIF results. The relative instantaneous distribution between the OH produced from the discharge channels and the toluene flow was simultaneously visualized. The instantaneous distributions of toluene and OH radicals that were acquired simultaneously by PLIF, were well complementary, suggesting that radicals generated by the gliding arc discharge were responsible for toluene removal in the active volume of the gliding arc discharge. The effective width of the plasma volume for the toluene removal were measured, which gives a new insight into the optimization of industrial design for practical gliding arc reactors.

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Simultaneous Removal of Polycyclic Aromatic Hydrocarbons and Soot Particles from flue Gas by Gliding arc Discharge Treatment

Cited by 31 publications

References 17 publications

Electron Beam Technology for Multipollutant Emissions Control from Heavy Fuel Oil-Fired Boiler

Electron Beam Technology for Multipollutant Emissions Control from Heavy Fuel Oil-Fired Boiler

Destruction of anthracene using a gliding arc plasma reformer

In-Situ Non-intrusive Diagnostics of Toluene Removal by a Gliding Arc Discharge Using Planar Laser-Induced Fluorescence

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