TY - GEN
T1 - LEAN NOX TRAP CATALYSIS FOR NOX REDUCTION IN NATURAL GAS ENGINE APPLICATIONS
AU - Parks, James E.
AU - Ferguson, H. Douglas
AU - Williams, Aaron M.
AU - Storey, John M.E.
N1 - Publisher Copyright:
© 2004 by ASME.
PY - 2004
Y1 - 2004
N2 - Reliable power generation and distribution is a critical infrastructure for the public and industry. Large-bore spark-ignited natural gas reciprocating engines are a reliable source of power generation. Lean operation enables efficient operation, and engines can conveniently be placed wherever natural gas resources are located. However, stricter emission regulations may limit the installation and use of more natural gas reciprocating engines if emissions cannot be reduced. Natural gas engine emissions of concern are generally methane, carbon monoxide, and oxides of nitrogen (NOx). Methane and carbon monoxide can be controlled by oxidation catalysts; however, NOx emissions are difficult to control in lean exhaust conditions. One method of reducing NOx in lean exhaust conditions is lean NOx trap catalysis. Lean NOx trap technologies (also known as NOx adsorber catalysts, NOx storage and reduction catalysts, etc.) have demonstrated >90% NOx reduction for diesel reciprocating engines and natural gas turbines. In the work presented here, the feasibility of a lean NOx trap catalyst for lean burn natural gas reciprocating engines will be studied. Tests were conducted on a Cummins 8.3-liter engine on a dynamometer. The lean NOx trap catalyst was controlled in a valved exhaust system that utilized natural gas as the catalyst reductant. Oxidation and reformer catalysts were used to enhance utilization of methane for catalyst regeneration. The feasibility of this approach will be discussed based on the observed NOx reduction and associated fuel penalties.
AB - Reliable power generation and distribution is a critical infrastructure for the public and industry. Large-bore spark-ignited natural gas reciprocating engines are a reliable source of power generation. Lean operation enables efficient operation, and engines can conveniently be placed wherever natural gas resources are located. However, stricter emission regulations may limit the installation and use of more natural gas reciprocating engines if emissions cannot be reduced. Natural gas engine emissions of concern are generally methane, carbon monoxide, and oxides of nitrogen (NOx). Methane and carbon monoxide can be controlled by oxidation catalysts; however, NOx emissions are difficult to control in lean exhaust conditions. One method of reducing NOx in lean exhaust conditions is lean NOx trap catalysis. Lean NOx trap technologies (also known as NOx adsorber catalysts, NOx storage and reduction catalysts, etc.) have demonstrated >90% NOx reduction for diesel reciprocating engines and natural gas turbines. In the work presented here, the feasibility of a lean NOx trap catalyst for lean burn natural gas reciprocating engines will be studied. Tests were conducted on a Cummins 8.3-liter engine on a dynamometer. The lean NOx trap catalyst was controlled in a valved exhaust system that utilized natural gas as the catalyst reductant. Oxidation and reformer catalysts were used to enhance utilization of methane for catalyst regeneration. The feasibility of this approach will be discussed based on the observed NOx reduction and associated fuel penalties.
UR - http://www.scopus.com/inward/record.url?scp=84855936994&partnerID=8YFLogxK
U2 - 10.1115/ICEF2004-871
DO - 10.1115/ICEF2004-871
M3 - Conference contribution
AN - SCOPUS:84855936994
T3 - ASME 2004 Internal Combustion Engine Division Fall Technical Conference, ICEF 2004
SP - 153
EP - 164
BT - ASME 2004 Internal Combustion Engine Division Fall Technical Conference, ICEF 2004
PB - American Society of Mechanical Engineers (ASME)
T2 - ASME 2004 Internal Combustion Engine Division Fall Technical Conference, ICEF 2004
Y2 - 24 October 2004 through 27 October 2004
ER -
