Selective catalytic reduction technology(SCR)

Introduction

Selective catalytic reduction utilizes reducing agents such as ammonia water, urea to selectively react with NOx in flue gas and generate N₂ and H₂O via a catalyst. Catalyst is a substance that can enhance reaction rate and remained unchanged in composition, quality, and chemical property after the reaction. The main composition of the catalyst used is V₂O₅ and TiO₂.

Main reaction

• NO/NO₂ + NH₃ + O₂ → N₂ + H₂O (reaction temperature 200-450℃)

Advantages

1. High denitrification efficiency (≥90%).
2. Adapted by most of the large scale thermal power plant. Matured technology with a lot of references.

Application

1. Boilers under stable operation.

References

• Shandong Befar Group Co., Ltd. (Shandong, China)
• Shanxi Linfen Thermoelectricity Co., Ltd (Shanxi, China)
• China Huaneng Group (Qufu, Shandong, China)
• China Huaneng Group (Rizhao, Shandong, China)
• China Huaneng Group (Yantai, Shandong, China)