Axens offer 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.
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.
CR-400 is suitable for all converters and offers low loading density with low attrition loss and high mechanical strength.
Advanced alumina sulfur recovery catalyst 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.
Titanium dioxide (titania) catalysts offer the ultimate in SRU performance. Claus reaction, sulfation resistance, and conversion of CS2 and COS have established CRS 31 as truly outstanding and, consequently, it has become the world’s leading high performance SRU catalyst.
For managing aromatics in claus feeds: CSM 31 is a new selective hydrogenation catalyst developed expressly for use in association with CRS 31 to achieve the highest COS and CS2 and Claus conversions in streams containing aromatics.
Excessive oxygen in the feed results in bulk sulfate formation that eventually poisons the catalyst. AM catalysts mitigate bulk sulfate formation and increase catalyst service life typically by 50%.
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Claus Active Bed Support Catalysts
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Tail 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 process where sulfur species are reduced back to H2S and recycled to the Claus section inlet.Discover
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