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SCR (Selective Catalytic Reduction) Technology Overview

Most of the nitrogen oxide abatement processes currently applied are selective catalytic reduction (SCR) processes that selectively reduce nitrogen oxides by using ammonia (NH₃) or urea as reducing agent, and it is a process that has had many commercial achievements since it was first proposed. The main mechanisms of the entire process are as follows.
KIYEON has the best catalyst and technologies for SCR process

In addition, methods such as direct reduction methods and wet methods have been proposed, but they are known to be ineffective, and the SCR method using a reducing agent has been proven to be the most effective method.

Description of SCR system

SNCR (Selective Non-Catalytic Reduction) Technology Overview

To reduce NOx (nitrogen oxides), selective catalytic reduction (SCR) is commonly used. The necessary factors are 1) the reducing agent, 2) SCR catalyst, and 3) temperature of the off gas required for the catalyst.
However, in some facilities, especially boilers, when a reducing agent (such as Urea, or NH₃) is added to the combustion space, NOx can be reduced by up to 70% without catalyst, if the temperature conditions are right.
In general, it is known that for SNCR, the temperature of the appropriate area in the furnace is from 850 ℃ to a maximum of 1,100 ℃, but in actual field, it is confirmed that 850~950 ℃ generally achieves a maximum NOx reduction efficiency of 50~70%.
We have various achievements in these SNCR technologies, and through CFD (computation fluid dynamics), we identify the optimal SNCR facility installation location, identify the optimal performance conditions to reduce nitrogen oxides, and obtain optimal nitrogen oxide reduction efficiency.
KIYON ENC Co., Ltd. provides optimal solution and engineering for Selective Non-Catalytic Reduction Technology, and integrated technology from equipment supply installation and commissioning.

Computational Fluid Dynamics

EPC Division