Catalytic cure for CO and HC produced by wet NOx control

Journal Article · · Cogeneration; (United States)

OSTI ID:6487468

de Biasi, B

Catalytic converters, designed for gas turbine operations, are being used to control exhaust emissions. They work by transforming carbon monoxide and hydrocarbons in the exhaust into water and carbon dioxide. Plant operators have two basic NOx control technologies from which to choose. One, an already proven technology, uses water and steam injected into the combustion system to inhibit NOx production. The other, known as selective catalytic reduction (SCR), injects ammonia into the exhaust to reduce directly the NOx content of the exhaust gas when contacted with the SCR catalyst. The wet firing method is currently considered by most regulatory bodies to be the best available control technology (BACT) for nitric oxide. However, while the water and steam injection lowers the average temperature in the turbine combustor to minimize NOx formation, it greatly increases the formation of CO and HC emissions. The SCR system uses ammonia as the primary reducing agent and provides higher NOx removal efficiency without increasing the CO and HC emission rates. However, the control schemes for the injection of ammonia may be complex, the system is significantly larger, uses more catalyst and introduces higher back pressure losses than oxidation catalyst systems.

• OSTI ID: 6487468
• Journal Information: Cogeneration; (United States), Journal Name: Cogeneration; (United States) Vol. 1:3; ISSN COGEE
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
424000* -- Engineering-- Pollution Control Equipment-- (1980-1989)
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION CONTROL
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYTIC CONVERTERS
CHALCOGENIDES
COMPARATIVE EVALUATIONS
CONTROL
DATA
EQUIPMENT
EXHAUST GASES
EXPERIMENTAL DATA
FLUIDS
GAS TURBINES
GASEOUS WASTES
GASES
HYDROCARBONS
INFORMATION
MACHINERY
NITROGEN COMPOUNDS
NITROGEN OXIDES
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
TURBINES
TURBOMACHINERY
WASTES