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Olefins & Diolefins saturation

Gums & Polymer formation control

Pressure drop induced by gum formation is frequently encountered in unit processing some cracked feedstock derived from various conversion processes. The olefins and mainly the diolefins contained in these streams tend to polymerize and get oxidized forming a crust which deposit in the upper layers of the reactor.

Axens has developed specific gradings, with neutral support and medium activity, to ensure the full hydrogenation of the olefins and diolefins while minimizing the risk of polymerization.

ACT 153

ACT 153 has been specifically developed to mitigate the pressure drop issues in the first stage of pygas hydrogenation and consequently to extend the cycle length of the unit.It is used as top bed grading material upstream the main catalytic bed in the first stage of pygas hydrogenation.

ACT 153 acts as a mild activity hydrogenation catalyst thanks to its low palladium content, ensuring smooth hydrogenation reaction on the top part of the bed where crust is frequently found and displaying excellent performances in combination with palladium based catalyst. The bead shape makes it easy to handle. Its size allows to create a gradient of particle size at the top of the reactor. The attrition resistance is particularly high.

Characteristics Pd, Al₂O₃
Shape Sphere
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Technical Data Sheet Safety Data Sheet

ACT 935

Active alumina ring. Scale trap and diolefins & olefins saturation.

Characteristics NiMo, Al₂O₃
Shape Hollow Cylinder
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Technical Data Sheet Safety Data Sheet

ACT 945

Active beads on neutral support. Dedicated to PYGAS service.

Characteristics NiMo, Al₂O₃
Shape Sphere
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Technical Data Sheet Safety Data Sheet

ACT 955

Active extrudate on neutral support. Diolefins & olefins saturation – Shape Grading.

Characteristics NiMo, Al₂O₃
Shape Sphere
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Technical Data Sheet Safety Data Sheet
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