SeLene™
SeLene™, Axens’ Selective Hydrogenation Catalysts Family, features the highest activity and lowest density on the selective hydrogenation catalyst market, allowing the highest level of performance while minimizing the cost to fill and maximizing energy cost savings.
More than 50 years in research and development and unit design have led to unmatched results with more than 750 worldwide license references and 850 worldwide catalysts references, for a cumulative onstream operating experience exceeding 30 MM hours.
LD 265
LD 265 is a palladium on alumina catalyst used in various selective and total hydrogenations among them deep olefins saturation for the light cuts, such as C3, C4, C5 or mixture thereof.
LD 465
LD 465 is a very active palladium on alumina catalyst specially designed for hydrogenation of pyrolysis gasoline cuts. Its very open pore structure maximizes the efficiency of active palladium.
LD 465 is also suitable for total hydrogenation of light cuts, such as C3, C4, C5 or mixture thereof.
C₂ Selective Hydrogenation
In addition to containing up to 90% ethylene, steam cracker C2 cuts contain from 0.5 to 3% acetylene. This highly unsaturated compound is undesirable in both chemical- and polymer-grade ethylene. The most elegant way to remove acetylene is via hydrogenation to ethylene.
C₂ Selective Hydrogenation
In front-end acetylene hydrogenation, the cracked gas contains high hydrogen levels, which can compromise ethylene selectivity and lead to operational instability. SeLene™ catalysts are designed to ensure safe, selective, and stable performance, even under challenging feed conditions, helping maximize ethylene yield while maintaining process reliability.
C₃ Selective Hydrogenation
In addition to containing up to 90% propylene, steam cracker C3 cuts contain from 2 to 8% methylacetylene and propadiene (MAPD). Selective hydrogenation of MAPD aims to remove MAPD through its hydrogenation to propylene.
Valorization of C3 Cut Valorization for Light Cuts
C₃ Selective Hydrogenation
Selective Hydrogenation Catalysts - SeLene™
C₄ Selective Hydrogenation
C4 cuts may be produced by steam crackers, fluidized catalytic crackers (FCC) unit or butane dehydrogenation units. These streams contain mainly olefins and paraffins, as well as diolefins (butadiene) and occasionally vinylacetylene (VAC).*
Valorization of C4 Cut Valorization for Light Cuts
C₄ Selective Hydrogenation
Selective Hydrogenation Catalysts - SeLene™
Pyrolysis Gasoline Hydrogenation
Ethylene production by steam cracking produces several by-products such as pyrolysis gasoline (pygas). Raw pygas contains highly valuable components such as BTX (benzene, toluene, xylenes), unsaturated compounds like diolefins, styrenics and olefins, and sulfur-containing compounds. In order to recover BTX, the unsaturated compounds and sulfur compounds have to be removed efficiently. This is the target of Axens’ catalysts through two different stages of pygas hydrogenation.
Selective Hydrogenation Catalysts for the Valorization for Pygas Cut
SeLene™ Selective Hydrogenation Catalysts for the Valorization for Pygas Cut - Boost the Performances of Pygas Hydrogenation Units
Arofining®
An important source of aromatics for petrochemical end-uses originates from high severity, continuous catalyst regeneration (CCR) reformers. The current trend towards high severity operation results in higher concentrations of undesired unsaturated hydrocarbons (diolefins, olefins, styrenes) in the reformate produced. These unsaturated hydrocarbons are selectively hydrogenated while minimizing the aromatic loss.
The selective hydrogenation can be implemented on the full reformate or any individual aromatics fraction depending on specific needs.
Arofining® Commercial Bulletin
Purify & Boost Aromatics Production through Selective Hydrogenation
Other Selective Hydrogenation
Other Selective Hydrogenation
- Phenol Production: The purpose of AMS Hydrogenation Unit is to convert the main by-product resulting from the Phenol process, the Alpha-Methyl-Styrene (AMS), to Cumene while preserving the aromatic nucleus and therefore avoid the hydrogenation of Cumene to isopropylcyclohexane (IPCH).
- Styrene Production: The purpose of Phenyl-Acetylene Hydrogenation Removal is to selectively hydrogenate the Phenyl-Acetylene (PA) formed in the styrene process, back to Styrene while limiting the saturation of Styrene to Ethyl-Benzene (EB). Phenyl Acetylene can have a negative effect on some styrene polymerization processes.
Resources
What could be causing rapid catalyst deactivation in the hydrogenation of heavier fractions downstream of our steam cracker furnace?
Technical Article - Catalytic Answer To A Steam Cracking Challenge
100th Award of Axens Solutions’ Latest Generation of High Performance Selective Hydrogenation Catalysts
100th Award of Axens Solutions’ Latest Generation of High Performance Selective Hydrogenation Catalysts
Technical Article - Catalytic Answer To A Steam Cracking Challenge
What could be causing rapid catalyst deactivation in the hydrogenation of heavier fractions downstream of our steam cracker furnace?
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