Plasma/catalyst system for reduction of NOx in diesel engine exhaust

Bae Hyeock Chun; Hyeong Sang Lee; Chang Soo Nam; Kwang Min Chun; Jae Hong Ryu; Kwan Young Lee

doi:10.4271/2000-01-2897

Plasma/catalyst system for reduction of NOx in diesel engine exhaust

Bae Hyeock Chun, Hyeong Sang Lee, Chang Soo Nam, Kwang Min Chun, Jae Hong Ryu, Kwan Young Lee

Department of Chemical and Biological Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

3 Citations (Scopus)

Abstract

NOx reduction by a plasma/catalyst system was tested with modeled gas and real exhaust gas. Ag/Al₂O₃ was used as the catalyst. The oxidation of NO to NO₂ by the plasma was increased as HC concentration and input energy density increase. The presence of H₂O in the reactant gas led to the production of acid by plasma. The catalytic activity for NOx reduction was enhanced by the assistance of plasma especially in the lower temperature region. This activity was a little suppressed in the presence of H₂O, but the acid was not detected in the effluent gas treated by the plasma/catalyst system. The NOx conversion to N₂ was evaluated by a gas chromatography in the model gas with helium as the balance gas. The result in helium balance gas showed the selectivity to N₂ depended on the catalyst temperature and was also enhanced by the assistance of plasma. The 50% of NOx removal from the diesel exhaust gas was achieved by the plasma /catalyst system.

Original language	English
Title of host publication	SAE Technical Papers
DOIs	https://doi.org/10.4271/2000-01-2897
Publication status	Published - 2000 Dec 1
Event	International Fall Fuels and Lubricants Meeting and Exposition - Baltimore, MD, United States Duration: 2000 Oct 16 → 2000 Oct 19

Other

Other	International Fall Fuels and Lubricants Meeting and Exposition
Country/Territory	United States
City	Baltimore, MD
Period	00/10/16 → 00/10/19

ASJC Scopus subject areas

Automotive Engineering
Safety, Risk, Reliability and Quality
Pollution
Industrial and Manufacturing Engineering

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10.4271/2000-01-2897

Cite this

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title = "Plasma/catalyst system for reduction of NOx in diesel engine exhaust",

abstract = "NOx reduction by a plasma/catalyst system was tested with modeled gas and real exhaust gas. Ag/Al2O3 was used as the catalyst. The oxidation of NO to NO2 by the plasma was increased as HC concentration and input energy density increase. The presence of H2O in the reactant gas led to the production of acid by plasma. The catalytic activity for NOx reduction was enhanced by the assistance of plasma especially in the lower temperature region. This activity was a little suppressed in the presence of H2O, but the acid was not detected in the effluent gas treated by the plasma/catalyst system. The NOx conversion to N2 was evaluated by a gas chromatography in the model gas with helium as the balance gas. The result in helium balance gas showed the selectivity to N2 depended on the catalyst temperature and was also enhanced by the assistance of plasma. The 50% of NOx removal from the diesel exhaust gas was achieved by the plasma /catalyst system.",

author = "Chun, {Bae Hyeock} and Lee, {Hyeong Sang} and Nam, {Chang Soo} and Chun, {Kwang Min} and Ryu, {Jae Hong} and Lee, {Kwan Young}",

year = "2000",

month = dec,

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doi = "10.4271/2000-01-2897",

language = "English",

booktitle = "SAE Technical Papers",

note = "International Fall Fuels and Lubricants Meeting and Exposition ; Conference date: 16-10-2000 Through 19-10-2000",

}

TY - GEN

T1 - Plasma/catalyst system for reduction of NOx in diesel engine exhaust

AU - Chun, Bae Hyeock

AU - Lee, Hyeong Sang

AU - Nam, Chang Soo

AU - Chun, Kwang Min

AU - Ryu, Jae Hong

AU - Lee, Kwan Young

PY - 2000/12/1

Y1 - 2000/12/1

N2 - NOx reduction by a plasma/catalyst system was tested with modeled gas and real exhaust gas. Ag/Al2O3 was used as the catalyst. The oxidation of NO to NO2 by the plasma was increased as HC concentration and input energy density increase. The presence of H2O in the reactant gas led to the production of acid by plasma. The catalytic activity for NOx reduction was enhanced by the assistance of plasma especially in the lower temperature region. This activity was a little suppressed in the presence of H2O, but the acid was not detected in the effluent gas treated by the plasma/catalyst system. The NOx conversion to N2 was evaluated by a gas chromatography in the model gas with helium as the balance gas. The result in helium balance gas showed the selectivity to N2 depended on the catalyst temperature and was also enhanced by the assistance of plasma. The 50% of NOx removal from the diesel exhaust gas was achieved by the plasma /catalyst system.

AB - NOx reduction by a plasma/catalyst system was tested with modeled gas and real exhaust gas. Ag/Al2O3 was used as the catalyst. The oxidation of NO to NO2 by the plasma was increased as HC concentration and input energy density increase. The presence of H2O in the reactant gas led to the production of acid by plasma. The catalytic activity for NOx reduction was enhanced by the assistance of plasma especially in the lower temperature region. This activity was a little suppressed in the presence of H2O, but the acid was not detected in the effluent gas treated by the plasma/catalyst system. The NOx conversion to N2 was evaluated by a gas chromatography in the model gas with helium as the balance gas. The result in helium balance gas showed the selectivity to N2 depended on the catalyst temperature and was also enhanced by the assistance of plasma. The 50% of NOx removal from the diesel exhaust gas was achieved by the plasma /catalyst system.

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DO - 10.4271/2000-01-2897

M3 - Conference contribution

BT - SAE Technical Papers

T2 - International Fall Fuels and Lubricants Meeting and Exposition

Y2 - 16 October 2000 through 19 October 2000

ER -

Plasma/catalyst system for reduction of NOx in diesel engine exhaust

Abstract

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ASJC Scopus subject areas

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