Denitrification

SCR Denitrification

• Technical Features

Selective Catalytic Reduction (SCR) denitrification refers to the process in which, with the aid of a catalyst, a reducing agent (such as NH₃) is used to react ‘selectively’ with NOx in the flue gas, thereby producing non-toxic and pollution-free N₂and H₂O.

•  A dedicated SCR reactor must be constructed.

•  The denitrification process produces N₂ and H₂O, which are directly discharged without pollution.

•  The catalyst is selected based on the flue gas temperature.

•  The flow rate of the ammonia solution (or ammonia gas, urea solution) is easy to control and adjust.

•  The denitrification efficiency is high, reaching up to 98%.

•  Reducing Agents for SCR Denitrification

  The reducing agents for denitrification include: liquid ammonia (NH₃), ammonia solution (NH₃·H₂O), and urea (CO(NH₂)₂).

• SCR Denitrification Catalyst

• The main components of the catalyst are V₂O₅, TiO₂, and WO₃.

•  Applicable flue gas temperature of the catalyst: Medium-temperature catalyst: 280°C – 420°C   Low-temperature catalyst: 160°C – 280°C