METHOD FOR REDUCING THE CONTENT OF NITROGEN OXIDES(NOX) IN GAS EXHAUSTED FROM COMBUSTION REACTOR

摘要

PURPOSE: Provided is a reduction method of NOx emissions from combustion reactors, in which a urea solution that contains surface active agents serving as a deNOx additive is injected into combustion reactors. CONSTITUTION: In a method for reducing NOx emissions from combustion reactors where a urea solution that contains 0.005-0.5wt.% of surface active agents serving as a deNOx additive is injected into combustion reactors being kept within the temperature range of 750 to 1100°C, the surface active agents are selected from the group consisting of nonionic and/or anionic alcohol-based surface active agent, anionic α-olefin surface active agent, anionic aliphatic surface active agent, and their mixtures. The urea solution containing surface active agents is injected into combustion reactors in an amount of 1 to 5 equivalents of urea, based on the equivalent of nitrogen oxides in a combustion reactor. Further, the urea solution containing surface active agents comprises 0.1 to 1wt.% of hydrogen peroxide or sorbitol.