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Trapping material for arsine, phosphine and sulfur from gas & liquid streams

Arsine Removal Adsorbents

The poisonous effects of arsine and other metal hydrides on hydrogenation and polymerization catalysts is well documented. By far the most common, arsine can seriously deactivate the high-activity Ziegler Natta, metallocene and noble metal catalysts used for processing cracked light ends. Arsine/phosphine guard bed is typically located before acetylene converter catalyst processing ethylene and before the MAPD (MethylAcetylene and PropaDiene) converter on propylene stream.

Sulfur compounds such as H2S and COS are frequently responsible for the catalyst poisoning problem, and their removal is also required to maintain the efficiency of downstream processing.
Arsine Removal Adsorbents

Axens’ Experience and Offer

Axens’ experience in arsine removal extend back to the 1970’s with an offer associated with a full range of services including:

  • Total arsine analysis in gas or liquid phase
  • On site pilot-testing in gas or liquid phase with Axens' Sorbotest™ device
  • Identification of alternatives and recommendations for spent sorbent disposal.

The unique properties of lead oxide make AxTrap™ 191 the only high-capacity options on very reactive feeds when copper or nickel-based adsorbents cannot be used. Axens know-how comes mainly from the preparation of the alumina support. The intrinsic properties of alumina are key to enhance mass transfer diffusion and take full advantage of the active phase.

AxTrap™ 192 and 194 work the same way as AxTrap™ 191 but this time the active metal oxide is Copper oxide. Copper oxide has more capacity than lead oxide but to the cost of a higher reactivity towards the feed. Axens will guide you through the right selection of arsine guard to be used to ensure smooth operation and on-spec product.

AxTrap™ 191

AxTrap™ 191 is a highly efficient alumina-based material with a highly dispersed metal oxide that removes arsine (AsH3), phosphine (PH3) and sulfur to ppb level from gas and liquid hydrocarbon streams.

AxTrap™ 191 trapping materials have more than 50 references worldwide, currently in operation.

AxTrap™ 191 is a guard bed, which can be used to protect highly sensitive catalysts used to cope with the severe specifications required for the polymer grade base chemical market. The streams to be purified can come from steam crackers, ROG, and methanol to olefins unit.

Characteristics Lead oxide based material
Shape Sphere
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Technical Data Sheet Safety Data Sheet

AxTrap™ 192

AxTrap™ 192 is especially designed for arsine, phosphine and H2S removal in order to protect selective hydrogenation catalysts.

AxTrap™ 192 is used on olefinic streams from FCC at moderate temperature, in the absence of MAPD and H2. It is a cost effective product with many references.

Characteristics Copper oxide based material
Shape Sphere
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Technical Data Sheet Safety Data Sheet

AxTrap™ 194

AxTrap™ 194 is a new generation and higher capacity adsorbent. AxTrap™ 194 is especially designed for arsine, phosphine and H2S removal in order to protect selective hydrogenation catalysts.

AxTrap™ 194 is used on olefinic streams from FCC at moderate temperature, in the absence of MAPD and H2. It is a cost effective product with many references.

Characteristics Copper oxide based material
Shape Sphere
Request
Technical Data Sheet Safety Data Sheet
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