Application and control of the Shell low temperature catalytic DeNOx system

Conference · Sun Oct 01 04:00:00 EDT 1995

OSTI ID:103728

Bredehoft, R L ^[1]; Gilmore, T; Croce, G ^[2]; Masskant, O ^[3]

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1. KTI Corp., San Dimas, CA (United States)
2. KTI Corp., Concord, CA (United States)
3. CRI Catalysts Ltd., London (United Kingdom)

As a result of the Clean Air Act and other legislation from State and Local Air Quality Management Districts, NOx emissions have become more restrictive. This tightening of NOx restrictions has presented petroleum refineries and co-generation operators with opportunities and challenges. The opportunity has been to stimulate the development of and testing of new and innovative ways to reduce the emission of NOx from combustion sources. The challenge is to incorporate the new and innovative developments into an operable, maintainable, least cost technology mix. The burner manufacturers have responded to the challenge and developed unique new burners which greatly reduce NOx. However, in some cases, the burners cannot achieve the required reductions and one has to look for alternative technologies such as Selective Catalytic Reduction (SCR) technology. Shell took up the challenge to develop a catalyst which could safely operate at low temperatures and Shell and KTI have developed a system which can achieve NOx reduction efficiencies greater than 90% at temperatures as low as 350 F. This technology called the Shell DeNOx System (SDS) has been designed and installed by Shell and KTI and has been in service for several years. The ability of the SDS to reduce NOx emissions at low flue gas temperatures enables the reactor to be positioned at the tail-end of a furnace or gas turbine HRSG section. This feature permits the installation of the technology without extensive retrofit costs associated with conventional SCR`s. This paper will discuss the application of the SDS installations and its advantages over conventional honeycomb technology.

• OSTI ID: 103728
• Report Number(s): CONF-950414--
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
CHEMICAL PLANTS
CONTROL
FOSSIL-FUEL POWER PLANTS
NITROGEN OXIDES
PETROLEUM REFINERIES
POLLUTION CONTROL EQUIPMENT
SELECTIVE CATALYTIC REDUCTION