APPLICATION OF SELECTIVE CATALYTIC REDUCTION (SCR) TECHNOLOGY FOR NOX REDUCTION FROM REFINERY COMBUSTION SOURCES

Selective Catalytic Reduction (SCR) has been applied as a NOx abatement technique for stationary sources of nitrogen oxides (NOx) in Japan since the early 1970s. To date, there are over 100 SCR installations operating in Japan. During the 1980s, a number of SCR systems have been installed in the United States, primarily in California. Among these applications are fired heater, boiler, and gas turbine/heat recovery steam generator (HRSG) installations. These installations provide a basis to assess the state-of-the-art for applying SCR to comply with refinery NOx emission limitations.