Vehicle exhaust treatment using electrical discharge and materials chemistry

Tonkyn, Russell G.; Balmer, M. Lou; Barlow, Stephan E.; Orlando, T.M.; Goulette, D.; Hoard, John

doi:10.2172/334040

Cited by 5 publications

(4 citation statements)

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“…Previous workers have used propene as the reductant in plasma treatment of NO x where no catalyst has been used [9][10][11] and also where a catalyst is used [12][13][14]. A detailed plasma reaction scheme mechanism and its validation have been described previously [15].…”

Section: Pacr Of No Xmentioning

confidence: 99%

Low Temperature Plasma Assisted Catalytic Reduction of NO x in Simulated Marine Diesel Exhaust

McAdams

Beech

Shawcross

2008

Plasma Chem Plasma Process

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Plasma Assisted Catalytic Reduction (PACR) of NO x has been investigated at laboratory scale for gas stream compositions representative of marine diesel exhausts. PACR NO x reduction in excess of 90% was measured at 350°C, a plasma specific energy of 60 J/l and two NO x concentrations (1,200 and 1,800 ppm). PACR NO x reduction of over 50% was measured for simulated marine engine conditions at 250°C, 60 J/l and 1,200 ppm NO x . The performance under these conditions could be increased, achieving a peak of *74% NO x reduction, although at a relatively high plasma power. Water, present in diesel exhaust, was shown to inhibit the poisoning effects of fuel sulphur using SO 2 as a representative exhaust component. The PACR system performance demonstrated tolerance to simulated fuel sulphur levels of up to 1% for the duration of the tests. PACR performance was also shown to be sensitive to the amount of hydrocarbon reductant used.

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Section: Pacr Of No Xmentioning

confidence: 99%

Low Temperature Plasma Assisted Catalytic Reduction of NO x in Simulated Marine Diesel Exhaust

McAdams

Beech

Shawcross

2008

Plasma Chem Plasma Process

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“…Future emission requirements will necessitate the use of exhaust treatment devices consisting of a catalytic system for NO x removal and a particulate filter for PM removal. Up to now, several technologies including continuous regeneration filter, (1) catalyzed filter (2) and ceramic filter (3) have been developed for PM removal, and various catalytic technologies such as lean NO x catalyst, (4) NO x trap, (5) selective catalytic reaction (SCR) (6) and plasmacatalyst (7) have been tried to reduce the NO x emission level. Among the NO x removal technologies, the SCR is well established, and is considered as the most promising way to reduce NO x .…”

Section: Introductionmentioning

confidence: 99%

“…In many recent papers, (4,7,13,14) it has been shown that partial conversion of NO into NO 2 using nonthermal plasma largely enhances the SCR because the mixture of NO and NO 2 reacts faster on catalyst surface than NO does. Especially, the improvement in the removal of NO x resulting from partial oxidation of NO becomes greater when reaction temperature is lower.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Removal of Nitrogen Oxides and Particulate Matters from Diesel Engine Exhaust using Dielectric Barrier Discharge and Catalysis Hybrid System

Mok

Huh

2005

Plasma Chem Plasma Process

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Dielectric barrier discharge (DBD) and catalysis hybrid process was used to remove nitrogen oxides and particulate matters from diesel engine exhaust. The DBD reactor converts a part of NO into NO 2 , and then the exhaust gas containing the mixture of NO and NO 2 enters the catalytic reactor where both NO and NO 2 are reduced to N 2 . The effect of energy density (power input divided by gas flow rate) and reaction temperature on the removal of nitrogen oxides was investigated with a stationary diesel engine. The hybrid process was able to remove about 80% of the initial nitrogen oxides at an energy density of 25 J/L and 150 • C. The removal of particulate matters did not largely depend on the electrode structure, but it was a strong function of the energy density. On the basis of 80% removal efficiency, the energy yield for nitrogen oxides was 40 eV/molecule while that for particulate matters was 83 kJ/mg. The present study suggests that this kind of hybrid process can be applied to simultaneous removal of nitrogen oxides and particulate matters from diesel engine exhausts.

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“…Plasma assisted selective catalytic reduction is currently being studied by many researchers. It is reported that the presence of plasma greatly enhances the performance of SCR catalyst to achieve high NOx removal efficiencies even at low gas temperatures [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Pt-Al2O3 catalyst and discharge plasma pre-treatment techniques for enhancing selective catalytic reduction of nitrogen oxides: a comparative study

Demidouk

Ravi

Chae

et al. 2005

React Kinet Catal Lett

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Vehicle exhaust treatment using electrical discharge and materials chemistry

Cited by 5 publications

References 0 publications

Low Temperature Plasma Assisted Catalytic Reduction of NO x in Simulated Marine Diesel Exhaust

Low Temperature Plasma Assisted Catalytic Reduction of NO x in Simulated Marine Diesel Exhaust

Simultaneous Removal of Nitrogen Oxides and Particulate Matters from Diesel Engine Exhaust using Dielectric Barrier Discharge and Catalysis Hybrid System

Pt-Al2O3 catalyst and discharge plasma pre-treatment techniques for enhancing selective catalytic reduction of nitrogen oxides: a comparative study

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