Comparative study of NO removal in surface-plasma and volume-plasma reactors based on pulsed corona discharges

Malik, Muhammad Arif; Kolb, Juergen F.; Sun, Yaohong; Schoenbach, K.H.

doi:10.1016/j.jhazmat.2011.09.079

Cited by 70 publications

(44 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…DBD can be divided into four types based on the reactor geometry: typical DBD, surface discharge, coplanar discharge, and packed-bed discharge [12]. Surface DBD (SDBD) plasma reactors (SDBDs) have aroused considerable interest because of its unique features and characteristics, for example, SDBDs are easily manufactured than other DBD reactor, and SDBDs result in a decrease in the breakdown voltages, and thus better energy efficiency is obtained [18]. Moreover, the flue gas resistance in SDBDs is much less than that in other DBD reactors due to its wider electrode gap in SDBDs when flue gas passes through DBD reactors.…”

Section: Introductionmentioning

confidence: 99%

Oxidation of Elemental Mercury by Active Species Generated From a Surface Dielectric Barrier Discharge Plasma Reactor

Shang

Lü

et al. 2013

Plasma Chem Plasma Process

View full text Add to dashboard Cite

A surface dielectric barrier discharge plasma reactor was employed to study Hg 0 oxidation in coal-fired flue gas. The experimental results showed that 98 % of Hg 0 oxidation efficiency and 13.7 lg kJ -1 of energy yield were obtained under a specific energy density (SED) of 7.9 J L -1 . Increasing SED was beneficial for Hg 0 oxidation due to higher production of active species. Higher initial concentration resulted in lower Hg 0 oxidation efficiency, but higher amount of Hg 0 oxidation. Water vapor inhibited Hg 0 oxidation because the generation of O 3 was suppressed. The presence of NO remarkably restrained Hg 0 oxidation, while SO 2 showed little effect on Hg 0 oxidation. Roles of active species in Hg 0 oxidation were examined under different gas atmospheres (O 2 and air), indicating that O 3 played an important role in Hg 0 oxidation. Deposits on the internal surface of the reactor were analyzed by energy dispersive spectroscopy and the product was identified as HgO.

show abstract

Section: Introductionmentioning

confidence: 99%

Oxidation of Elemental Mercury by Active Species Generated From a Surface Dielectric Barrier Discharge Plasma Reactor

Shang

Lü

et al. 2013

Plasma Chem Plasma Process

View full text Add to dashboard Cite

show abstract

“…Non-thermal plasmas (NTPs) are regarded as promising advanced oxidation processes (AOPs) for the sustainable and efficient removal of organic pollutants from wastewater (Ognier et al 2009;Hijosa-Valsero et al 2013;Iya-Sou et al 2013;Jamróz et al 2014;Magureanu et al 2015;Stratton et al 2015) and polluted gas (Ostapczuk et al 2008;Malik et al 2011;Jolibois et al 2012;Bao et al 2014;Zhang et al 2015). During the last few years, they have started to be examined for soil remediation (Wang et al 2010;Lou et al 2012;Ognier et al 2014;Aggelopoulos et al 2015a).…”

Section: Introductionmentioning

confidence: 99%

Atmospheric pressure dielectric barrier discharge for the remediation of soil contaminated by organic pollutants

Aggelopoulos

2016

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

The remediation of soil, contaminated by organic pollutants, in a cylinder-to-plane dielectric barrier discharge reactor at atmospheric air pressure was reported. Two model organic pollutants were selected; a solid pollutant (2,6-dichloropyridine) and a liquid pollutant (n-dodecane). The effects of the contaminant's initial concentration and state, the energy consumption, and the soil type on the pollutant removal efficiency were investigated. To that scope, various contaminated samples of both quartz sand and loamy sandy soil were treated by plasma for various treatment times and initial 2,6-dichloropyridine/ n-dodecane concentrations. The results revealed that (1) the removal efficiency of 2,6-dichloropyridine was higher compared to that of n-dodecane at a given plasma treatment time and (2) the removal efficiency increased with the energy density increasing, but decreased as the soil heterogeneity, organic matter and pollutant concentration were enhanced. The main removal mechanism proposed is the evaporation of pollutant molecules coupled with their oxidation by plasma species in the gas and solid/liquid phase.

show abstract

“…1 Alternatively, although high-energy electrons can also directly destroy chemical bonds in pollutants via inelastic collisions and reduce NO x to N 2 and O 2 , 2 this process is typically negligible compared with the oxidation reactions, and NO in flue gas is eventually converted into NO 2 , NO 3 , N 2 O 5 and other high-valence oxides. 3 There are many types of NTP reactors, [4][5][6][7] of which the pulsed corona discharge plasma (PCDP) reactors have received the most attention for the treatment of gaseous pollutants not only for their high safety and high discharge efficiency 8,9 but also due to their convenience in combination with conventional SCR/SNCR processes. However, in practice, the generation of nitric acid is common for most of the NTP De-NO x processes that are primarily based on oxidation reactions of nitrogen oxide; thus, it is necessary to add secondary pollution control measures.…”

Section: Introductionmentioning

confidence: 99%

Hydrazine-enhanced NO conversion in a pulsed corona discharge plasma (PCDP) reactor: Behaviors and mechanism

et al. 2016

View full text Add to dashboard Cite

The NO conversion efficiency in a pulsed corona discharge plasma (PCDP) reactor in the presence of a new additive, hydrazine hydrate (N2H4·H2O), was studied, and the reaction mechanism was analyzed. The NO conversion efficiency reached 62.5%, and the NO conversion Energy Yield (EY) reached 20.9 gNO/kWh, which is higher than that obtained using water or ammonia additives under the same conditions. The predominant elementary reactions and radicals, as well as the mechanism by which the additive enhanced the NO conversion process, were determined by comparing experimental data with theoretical simulation results and by performing a sensitivity analysis. After the addition of N2H4·H2O, the N2H4 reacts with radicals generated in the PCDP reactor to form a large quantity of strongly reducing species with NH2 as the predominant component, which can directly reduce NO to N2 and effectively prevent the generation of N2O. Compared with the traditional PCDP-based De-NOx process in which nitric acid is generated by oxidation with an additional neutralization step required, this new PCDP-based De-NOx process with N2H4·H2O addition is superior because NO is mostly reduced to N2. The study provides a basis for the application of N2H4·H2O as a synergist to improve NO abatement in a PCDP reactor.

show abstract

Comparative study of NO removal in surface-plasma and volume-plasma reactors based on pulsed corona discharges

Cited by 70 publications

References 42 publications

Oxidation of Elemental Mercury by Active Species Generated From a Surface Dielectric Barrier Discharge Plasma Reactor

Oxidation of Elemental Mercury by Active Species Generated From a Surface Dielectric Barrier Discharge Plasma Reactor

Atmospheric pressure dielectric barrier discharge for the remediation of soil contaminated by organic pollutants

Hydrazine-enhanced NO conversion in a pulsed corona discharge plasma (PCDP) reactor: Behaviors and mechanism

Contact Info

Product

Resources

About