Selective catalytic reduction system

Journal Article · Tue Oct 01 04:00:00 EDT 1996 · Diesel and Gas Turbine Worldwide

OSTI ID:420762

Clean burn two-cycle and four-cycle natural gas-fueled engines and liquid-fueled diesel engines operate with exhaust oxygen greater than 8% by volume. Because these engines often need additional exhaust treatment to bring them into compliance with environmental regulations, Houston Industrial Silencing (HIS) of Houston, Texas, has developed the DeNOx silencer for selective catalytic reduction (SCR) service. This SCR process employs ammonia injection with a catalytic formulated specifically for reduction of NO{sub x} and CO to required levels. The outstanding feature of this catalyst application (and the others mentioned here), is that there is virtually no slip of ammonia to atmosphere. At operating conditions, the ammonia will be consumed in the catalyst. Hence, elaborate ammonia control and monitoring are not necessary. NO{sub x} reduction by more than 80% has been experienced over a two year period of continuous maintenance-free operation on a natural gas-fueled, spark-ignited, two-cycle engine. Carbon monoxide reduction is greater than 80% and ammonia slip to atmosphere has never exceeded 10 ppm when NO{sub x} reduction is at the level of 75 ppm. This performance can be duplicated for virtually all emissions reduction requirements.

• OSTI ID: 420762
• Journal Information: Diesel and Gas Turbine Worldwide, Journal Name: Diesel and Gas Turbine Worldwide Journal Issue: 8 Vol. 28; ISSN DGWODS; ISSN 0278-5994
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
AIR POLLUTION CONTROL
CARBON MONOXIDE
DESIGN
DIESEL ENGINES
EXHAUST GASES
INTERNAL COMBUSTION ENGINES
NITROGEN OXIDES
POLLUTION CONTROL EQUIPMENT
SELECTIVE CATALYTIC REDUCTION