Claus Catalysts Promoting the Claus reaction kinetic while avoiding pore blockage in the catalyst is key to sulfur recovery maximization.
Axens is the world leading premium Claus catalyst supplier. Thanks to the Claus plants loaded with Axens SulShine® Claus Catalysts, around 50 million tons of SO₂ are not emitted to the atmosphere. Overall, it represents around 40% of the Sulfur recovered from refining and gas processing operations in 2024. If not recovered, this could increase yearly worldwide SO₂ emissions (all sectors) by 50%.
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Axens Offer
Axens offers a complete range of Claus Catalysts and support media for meeting the needs of every Claus system. Axens aluminas provide first-class performance thanks to their optimized properties.
When dealing with difficult species, titanium dioxide-based catalysts, used alone or in combination with aluminas, is the solution of choice to reach outstanding performances. For lean acid gas, Axens has developed a unique promoted alumina which enables dealing with the adverse effect of aromatics on the catalyst cycle duration.
SulShine® CRS 41
New generation of titanium dioxide (titania) catalysts offering one step further in SRU performances by increasing its porosity and lowering its density.
SulShine® CRS 31
Titanium dioxide (titania) catalysts offer the ultimate SRU performances. Claus reaction, sulfation resistance, and conversion of CS2 and COS have established SulShine® CRS 31 as truly outstanding and, consequently, it has become the world’s leading high performance SRU catalyst.
SulShine® CR-3S
Advanced alumina sulfur recovery catalyst SulShine® CR-3S is a high-purity-alumina catalyst available as 3-6 mm diameter beads. This superior Claus catalyst is characterized by its tailored ultra-macroporosity, excellent mechanical properties and improved diffusion properties.
SulShine® CR-400
SulShine® CR-400 is suitable for all converters and offers low loading density with low attrition loss and high mechanical strength.
SulShine® CR 3-7
The Standard Macroporous Claus Catalyst.
This alumina catalyst is for standard Claus feeds where the basic priorities are simple conversion of H2S and when low pressure drop requirements are imposed.
SulShine® CSM 31
For managing aromatics in Claus feeds: SulShine® CSM 31 is the selective hydrogenation catalyst developed expressly for use in association with SulShine® CRS 31 to achieve the highest COS and CS2 and Claus conversions in streams containing aromatics.
SulShine™ AM
Excessive oxygen in the feed results in bulk sulfate formation that eventually poisons the catalyst. SulShine™ AM catalysts mitigate bulk sulfate formation and increase catalyst service life typically by 50%.
SulShine™ AMS
Compared with SulShine™ AM catalyst, SulShine™ AMS offers a similar bed protection by oxygen scavenging. In addition, SulShine™ AMS provides a higher activity in Claus and COS/CS2 hydrolysis reactions.
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Claus Active Bed Support Catalysts
Claus productivity can be boosted if the bed support material also acts as catalyst.
DiscoverTail Gas Treatment Catalysts
To further increase recovery yields, tail gas leaving the Claus section can be treated using different processes. Axens offers dedicated products for sub-dewpoint applications or hydrogenation processes where sulfur species are reduced back to H₂S and recycled to the Claus section inlet.
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