SNRB CATALYTIC BAGHOUSE LABORATORY PILOT TESTING

The SOx-NOx-Rox Box(TM) (SNRB) is an advanced air pollution process patented by Babcock & Wilcox (B&W) that provides for significantly reduced sulfur oxides (SOx), nitrogen oxides (NOx), and particulate emissions from coal-fired boilers. The process uses a high-temperature catalytic baghouse for integrating SOx reduction through injecting an alkali sorbent (such as hydrated lime or sodium bicarbonate), NO(x) removal through ammonia injection and selective catalytic reduction (SCR), and particulate collection. The advantages of the process include: compact integration of the emission control technologies into a single component; dry sorbent and by-product handling; and improved SCR catalyst life due to lowered SO(x) and particulate levels. The SNRB concept has been successfully demonstrated in a 1500-ACFM pilot baghouse at B&W's Alliance (Ohio) Research Center. This paper describes the SNRB technology and presents the SO(x), NO(x), and particulate removal performance results over a range of operating conditions for the laboratory pilot test program.