Common Flue Gas Denitration Technologies: A Brief Overview

For plant managers and engineers seeking to control emissions, understanding the available flue gas denitration technologies is the first step toward compliance and operational efficiency. Simply put, desulfurization removes sulfur dioxide (SO₂), while denitration removes nitrogen oxides (NOx) from boiler flue gas. The core principle involves reducing generated NOx back into harmless nitrogen (N₂).

Here, we briefly explain three common technologies, with a focus on the most widely adopted method where Pingxiang Zhongci Environmental Ceramics Material Co., Ltd., as a professional manufacturer, provides key components.

1. Selective Catalytic Reduction (SCR): The Industry Standard

SCR is the most prevalent and efficient post-combustion NOx control technology. It uses ammonia or urea as a reducing agent to selectively convert NOx into N₂ and H₂O over a catalyst.

Why it's Preferred: For coal-fired power plants and heavy industries, SCR offers high removal efficiency (often over 90%) and reliability.

The Heart of the System: The Catalyst. Performance depends critically on the catalyst. Our expertise lies in manufacturing high-performance honeycomb-type SCR catalysts, which dominate the market due to their high surface area and durability.

learn more about the product ： High Temperature SCR Denitration Catalyst
 

For high-temperature applications (e.g., gas kilns, certain industrial processes), our High Temperature SCR Denitration Catalyst is engineered for stability in 300°C to 550°C environments. Utilizing a cordierite carrier, it maintains activity where thermal deactivation is a concern.

As a factory and supplier, we provide not just catalysts, but integrated support. Our technical team can advise on catalyst selection and customization based on your specific flue gas profile and dust conditions.

2. Ozone Oxidation Technology

This method utilizes the strong oxidizing power of ozone (O₃) to convert insoluble NO into nitrogen oxides (NO₂, N₂O₅) that are easily soluble in water. These are then removed together with SO₂ in a subsequent wet scrubber using an alkaline solution, making it an integrated desulfurization and denitration technology.

3. Plasma Technology

This is a dry treatment process that uses high-energy electrons from plasma to activate oxidation reactions. It simultaneously removes SO₂ and NOx by converting them into sulfates and nitrates, which can react with added ammonia to form collectable ammonium salts.

Conclusion: Choosing the Right Technology

While each technology has its place, SCR remains the benchmark for high-efficiency NOx control in major industries like power generation. The choice depends on factors like flue gas temperature, composition, space constraints, and required removal efficiency.

Partner with an Experienced Manufacturer
Choosing the right technology and the right catalyst supplier is crucial for long-term performance. With over a decade of experience as a ceramic and chemical packing manufacturer, Zhongci offers reliable SCR catalyst solutions backed by ISO certification and a global customer base.

Looking to optimize your SCR system or explore catalyst options?
Contact us for technical data on our high-temperature catalysts or to discuss a customized solution for your plant's needs.