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

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Abstract

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 SO2 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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Notes

  1. SO2 levels were calculated using the calculator at www.dieselnet.com/calculator/sulfur.html with representative engine parameters

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Acknowledgements

The authors would like to thank Wärtsilä Corporation for supporting the work through the European VIth Framework Integrated Project High Efficiency Engine R&D on Combustion with Ultra Low Emissions for Ships (HERCULES).

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  1. Roy McAdams

    Present address: UKAEA, Culham Science Centre, Abingdon, Oxon, OX14 3DB, UK

Authors and Affiliations

  1. Accentus plc, B401.8, Harwell, Didcot, OX11 0QJ, Oxfordshire, UK

    Roy McAdams, P. Beech & J. T. Shawcross

Authors
  1. Roy McAdams
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  2. P. Beech
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  3. J. T. Shawcross
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Correspondence to Roy McAdams.

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McAdams, R., Beech, P. & Shawcross, J.T. Low Temperature Plasma Assisted Catalytic Reduction of NO x in Simulated Marine Diesel Exhaust. Plasma Chem Plasma Process 28, 159–171 (2008). https://doi.org/10.1007/s11090-007-9091-1

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  • DOI: https://doi.org/10.1007/s11090-007-9091-1

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