Improved thermal DENO/sub x/ process verified by field testing

Conference · Sun Jan 01 04:00:00 EST 1984 · Proc., Annu. Meet., Air Pollut. Control Assoc.; (United States)

OSTI ID:6028532

Hurst, B E

A non-catalytic method for removing oxides of nitrogen (NO/sub x) from flue gas in stationary combustion sources has been developed and commercially demonstrated. Types of installations on which the process has been installed include gas and oil-fired steam boilers, utility boilers, process furnaces, oil field steam generators and a glass melting furnace. Successful tests have also been conducted on a municipal incinerator. This process, called thermal DENO/sub x/, is based on a gas phase homogeneous reaction. The technology involves injection of ammonia into the hot flue gas within a prescribed temperature range. This temperature range can be significantly expanded through the additional injection of hydrogen. The NO/sub x/ reduction is essentially independent of the concentration of oxides of sulfur or particulate matter in the flue gas. Recently, development of an accurate kinetic model of the process chemistry has significantly expanded the understanding of the interaction of all parameters affecting DENO/sub x/ performance, and permits accurate calculation of NO/sub x/ emission reduction and ammonia breakthrough. In addition, field tests on novel injector designs reveal greater performance capability than previously achieved. These advances have resulted in DENO/sub x/ capability of 70% to over 80%, load following capability without the use of hydrogen, grid-less injectors and a lower cost. In this paper, the new technology is described by briefly reviewing the process chemistry and current injection systems. Also illustrated is the recently expanded capability to assess the essential for DENO/sub x/ effectiveness in new and existing designs of fired equipment by three-dimensional flow modeling coupled with the kinetic model.

• Research Organization: Exxon Research and Eng. Co., Florham Park, NJ
• OSTI ID: 6028532
• Report Number(s): CONF-840612-
• Conference Information: Journal Name: Proc., Annu. Meet., Air Pollut. Control Assoc.; (United States) Journal Volume: 3
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION ABATEMENT
AMMONIA
BOILERS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
COMPUTERIZED SIMULATION
ELEMENTS
FIELD TESTS
FLOW MODELS
FLUE GAS
FURNACES
GASEOUS WASTES
HYDRIDES
HYDROGEN
HYDROGEN COMPOUNDS
INCINERATORS
KINETICS
MATHEMATICAL MODELS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NITROGEN OXIDES
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
POLLUTION ABATEMENT
REACTION KINETICS
REMOVAL
SIMULATION
STEAM GENERATORS
TEMPERATURE DEPENDENCE
TESTING
VAPOR GENERATORS
WASTES