Optimizing SCR catalyst design and performance for coal-fired boilers

Technical Report · Mon Jan 01 04:00:00 EST 1996

OSTI ID:374522

Pritchard, S; DiFrancesco, C ^[1]; Kaneko, S ^[2]

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1. Cormetech, Inc., Durham, NC (United States)
2. Mitsubishi Heavy Industries, Yokohama (Japan); and others

The design of an SCR system for a coal-fired application is a challenge due to particulate, catalyst poisons, and SO{sub 2} in the flue gas. Our experience shows that coal-fired SCRs are successful when the system impacts and catalyst deterioration factors are understood and specific countermeasures are implemented in system and catalyst design. There are several factors that the system and catalyst designers must consider in order to assure success. They include: type of boiler, required performance, fuel and ash analysis, ash loading, type of SCR, inlet conditions, catalyst deactivation mechanisms, and impact on downstream equipment. This paper explains each system impact and catalyst deterioration factor that we have experienced. For each factor, it presents the specific countermeasures that have resulted in successful SCR systems. Also, it discusses the design of improved catalysts derived from our experience. Finally, two case studies illustrate the impact of optimized design.

• Research Organization: Electric Power Research Inst., Palo Alto, CA (United States)
• OSTI ID: 374522
• Report Number(s): EPRI-TR--105978-V3; CONF-9505150--Vol.3
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
20 FOSSIL-FUELED POWER PLANTS
AIR POLLUTION CONTROL
BOILERS
CATALYSTS
COAL
COMBUSTION
DENITRIFICATION
DESIGN
FLUE GAS
FOSSIL-FUEL POWER PLANTS
NITROGEN OXIDES
PERFORMANCE
SELECTIVE CATALYTIC REDUCTION