COMBUSTION FLUE GAS NOX TREATMENT

摘要

Combustion flue gas containing NOx and SOx is treated to remove NOx in a multistep system in which NOx is reduced in the flue gas stream via selective catalytic reduction or selective non-catalytic reduction with ammonia or an ammonia- forming compound, followed treatment with hydrogen peroxide to remove residual ammonia and, optionally, treatment with an alkali reagent to reduce residual NOx in the flue gas stream. The NOx-depleted flue gas stream may also be subjected to a desulfurization treatment for removal of SOx.