SCR and hybrid systems for utility boilers: A review of current EPRI-sponsored results

Journal Article · Sun Dec 31 04:00:00 EST 1995 · Preprints of Papers, American Chemical Society, Division of Fuel Chemistry

OSTI ID:460138

Zammit, K D ^[1]

---

1. Electric Power Research Institute, Palo Alto, CA (United States)

Selective Catalytic Reduction (SCR) has been widely demonstrated in Europe and Japan as a postcombustion NO{sub x} control technology. However, most of this experience has been gained using relatively low-sulfur fuels, typically less than 1.5 percent. By comparison, the application of SCR in the United States has been much more limited, and to date the experience base is virtually non-existent for coal- and oil-fired boilers. Higher fuel sulfur content corresponds to higher concentrations of SO{sub 2} and SO{sub 3} which can lead to potential poisoning and more rapid deactivation of the catalyst. In addition, SCR catalysts have the potential to oxidize SO{sub 2} to SO{sub 3}, which can lead to serious problems with ammonium sulfate and/or bisulfate deposition in the air preheated, marketability of fly ash, and potential increases in plume opacity. A number of elements present in fly ash, such as arsenic and alkaline metals, may poison the active sites of an SCR catalyst. This paper describes an EPRI sponsored pilot program to evaluate the use of SCR as a function of fuel type and boiler design.

• OSTI ID: 460138
• Report Number(s): CONF-950801--
• Journal Information: Preprints of Papers, American Chemical Society, Division of Fuel Chemistry, Journal Name: Preprints of Papers, American Chemical Society, Division of Fuel Chemistry Journal Issue: 4 Vol. 40; ISSN 0569-3772; ISSN ACFPAI
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
AIR POLLUTION CONTROL
AMMONIA
CATALYTIC EFFECTS
COAL
FLUE GAS
FOSSIL-FUEL POWER PLANTS
FUEL OILS
HYBRID SYSTEMS
MOLYBDENUM
NICKEL
NITROGEN OXIDES
SELECTIVE CATALYTIC REDUCTION
TITANIUM
VANADIUM