DEV SRC – S09 – Devson Group

DEV SRC-S09 is a specialized alumina-based, iron oxide–promoted catalyst designed for Sulphur Recovery Units (SRUs). It functions as a protective guard layer, strategically loaded on top of the main Claus catalyst bed. Its primary role is to scavenge excess oxygen from the feed stream, effectively preventing the sulphation of downstream catalysts. With excellent physical strength, high surface area, and inherent resistance to sulphation, DEV SRC-S09 extends the on-stream period while enhancing the overall efficiency and reliability of Claus reaction systems.

Iron oxide promoted on High Surface area Alumina
Uniform promoted dispersion for better activity
Provides oxygen scavenging along with sulphur recovery

the process

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Efficient Oxygen Protection

In presence of oxygen, Claus catalysts have a very short life span due to sulphation poisoning. Only a small top layer of DEV SRC-S09 is required above the Claus bed to deliver effective protection against oxygen slippage. Despite limited volume, this catalyst efficiently removes excess oxygen, shielding the downstream catalyst from sulphation and preserving its long-term performance.

True Catalytic Function

Unlike CaO-based oxygen scavengers that are spent after all sites are utilized only once, DEV SRC-S09 operates as a true catalyst. It undergoes continuous in-process regeneration with the help of excess H₂S present in the Claus environment, ensuring sustained oxygen removal throughout the service cycle of the catalyst it is protecting.

Extended Life for Claus Catalysts

By preventing sulphation of the downstream catalyst beds, DEV SRC-S09 safeguards activity and functionality, even in cases of oxygen ingress. This protective action extends the operational life of the main Claus catalysts, improves turnaround intervals, and enhances overall process reliability.

Operational Flexibility

DEV SRC-L01 maintains its effectiveness across different reactor designs, gas compositions, and temperature conditions. This catalyst has been proven in Standard Claus, Modified Claus, CBA, and MCRC processes, making it suitable for both main convertors and degassers. Its versatility simplifies operations, reduces inventory requirements, and ensures consistent results in diverse process settings.

Advantages

Reduces oxygen-related deactivation of Claus catalysts
Enhances SRU uptime and turnaround cycles
cost-effective and reliable solution for oxygen management in SRUs

Technical Specifications

Composition	Iron Oxide on High Purity Alumina
Shape	Spheres
Sizes	4 – 6 mm (Customisable ranges)

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