Ammonia oxidation catalyst for the coal fired utilities

摘要

A process is described that removes by oxidation the excess ammonia (NH₃) gas from flue gases that have been subjected to selective catalytic reduction (SCR) of oxides of nitrogen (NO_x) by ammonia injection. The inventive process incorporates a secondary catalyst of precious metal and vanadia on a metal oxide such as titania to catalyze the oxidation of both ammonia and carbon monoxide (CO) while maintaining sulfur dioxide (SO₂) levels.