Hybrid system combined SNCR plus SCR technologies for post-combustion NO{sub x} reduction
Among the numerous processes and technologies available for post-combustion NO{sub x} control, the two most commonly known are Selective Non-Catalytic Reduction (SNCR) and Selective Catalytic Reduction (SCR). SNCR involves injection of urea or ammonia based reagents in the high temperature zone of a boiler where the thermal decomposition results in the reduction of NO{sub x}, while SCR selectively reduces NO{sub x} in the presence of a catalyst at a substantially lower temperature. The paper discusses a novel approach to combine both SNCR and SCR techniques resulting in an economical and effective technology for NO{sub x} reduction. In fact while these post-combustion technologies have been used individually, there are merits to combining the technologies into a staged concept that utilizes both SNCR and SCR, in order to eliminate or reduce the limitations of each. In that approach the SCR is represented by two different types of catalyst: In-Duct or stationary catalyst (IDSCR), and the catalyzed hot end portion of an Air Heater (AHSCR).
- Research Organization:
- Hamon Cifa Progetti (IT)
- OSTI ID:
- 20018944
- Report Number(s):
- CONF-9806214-; TRN: IM200018%%178
- Resource Relation:
- Conference: Power-Gen Europe'98, Milan (IT), 06/09/1998--06/11/1998; Other Information: 1 CD-ROM. Operating Systems: Windows 3.1, '95, '98 and NT; Macintosh; and UNIX; PBD: [1998]; Related Information: In: Power-gen Europe'98, [2400] pages.
- Country of Publication:
- United States
- Language:
- English
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