At IGS, our Hot-tek® services are designed to keep catalyst systems and emission control equipment operating safely and efficiently, all without the need for costly shutdowns. Below, our experts answer the most frequently asked questions about online catalyst maintenance, sharing insights from decades of experience supporting refineries, petrochemical plants, and power facilities around the world.

Hot-tek® HVS FAQ – Catalyst Cleaning and Fouling Prevention

---

1- Do you need to reduce the heater duty for Hot Vacuum Service? 

No. Like other Hot-tek services, SCR Hot Vacuum Cleaning can be completed online under negative pressure without impacting production.

 

2- What percentage of the catalyst surface can be cleaned? 

IGS tailors each project to maximize accessible surface area with the minimum number of access ports. This ensures effective cleaning and helps prevent emergency shutdowns.

 

3- Do you damage the catalyst while cleaning? 

No. Our frictionless nozzle design eliminates the risk of mechanical or thermal damage to catalyst surfaces.

 

4- What are the operating temperatures for SCR systems?

Typical service conditions range: 700-750°F | 370-400°C 

 

5- What causes SCR fouling, and how is it mitigated?

Fouling sources often include friable refractory particles, fuel contaminants, and environmental pollutants. IGS combats this through Cetek Refractory Encapsulation coatings, as well as screens and air cannons that form part of our complete SCR fouling mitigation package.

---

 

Trusted Online Maintenance Without Shutdowns

With the IGS SCR Hot Vacuum Service, operators can safely clean catalysts online and prevent costly unplanned shutdowns. Our frictionless nozzle system ensures zero damage, while complementary solutions like Cetek coatings and air cannons address the root causes of fouling.

Learn more about SCR Catalyst Cleaning Online or contact us.