Ammonia injection grid (AIG) is used to introduce vaporized ammonia (NH3) into an exhaust gas...
Although selective catalytic reduction (SCR) of NOx is presently a mature technology, new design applications and stricter performance requirements present significant challenges and an urgent need for innovative technology development. This article discusses the state-of-the-art design of commercial ammonia-based SCR systems designed for stationary sources.
Particular attention is given to controlling NOx and ammonia slip emissions at ultra-low concentrations, new generation of exhaust systems for simple cycle power plants, improved ammonia injection grids, control systems designed for non-steady state operations, mathematical modeling of SCR systems designed for power plants and SCR catalyst poisoning.
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