Plasma/catalyst system for reduction of NOx in lean condition

H. S. Lee, Min Chun Kwang Min Chun, B. H. Chun, Kwan Young Lee

Research output: Contribution to journalArticle

Abstract

A plasma/catalyst (Ag/Al2O3) system in rich oxygen similar to a lean-burn engine exhaust was used to study the NOx conversion to N2. Ag/Al2O3 significantly enhanced NOx conversion in the lower temperature range under 400°C. At 300°-500°C, HC (C1 base)/NOx ratio of around 3:1, and 10% O2, the NOx conversion of the catalyst system was 40-50%, with over 96% selectivity to N2. When assisted by plasma, Ag/Al2O3 exhibited better performance than Al2O3. Helium was utilized as balance gas to measure N2 formation by GC. NOx conversion was measured using a chemiluminescence NOx analyzer in N2 and He balances. NOx conversion in N2 balance gas was similar to that in He balance gas, proving that the plasma effect obtained in He balance gas could be consistent with that of N2 balance gas, which is the largest component of the real exhaust gas. At 300°C, the largest enhancement by plasma was observed. Original is an abstract.

Original languageEnglish
JournalInternational Symposium on Combustion Abstracts of Accepted Papers
Issue numberA
Publication statusPublished - 2000 Dec 1

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Gases
Plasmas
Catalysts
Plasma Gases
Vehicle Emissions
Helium
Chemiluminescence
Exhaust gases
Exhaust systems (engine)
Oxygen
Temperature

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Plasma/catalyst system for reduction of NOx in lean condition. / Lee, H. S.; Kwang Min Chun, Min Chun; Chun, B. H.; Lee, Kwan Young.

In: International Symposium on Combustion Abstracts of Accepted Papers, No. A, 01.12.2000.

Research output: Contribution to journalArticle

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N2 - A plasma/catalyst (Ag/Al2O3) system in rich oxygen similar to a lean-burn engine exhaust was used to study the NOx conversion to N2. Ag/Al2O3 significantly enhanced NOx conversion in the lower temperature range under 400°C. At 300°-500°C, HC (C1 base)/NOx ratio of around 3:1, and 10% O2, the NOx conversion of the catalyst system was 40-50%, with over 96% selectivity to N2. When assisted by plasma, Ag/Al2O3 exhibited better performance than Al2O3. Helium was utilized as balance gas to measure N2 formation by GC. NOx conversion was measured using a chemiluminescence NOx analyzer in N2 and He balances. NOx conversion in N2 balance gas was similar to that in He balance gas, proving that the plasma effect obtained in He balance gas could be consistent with that of N2 balance gas, which is the largest component of the real exhaust gas. At 300°C, the largest enhancement by plasma was observed. Original is an abstract.

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