Application : Arsenic Removal from sour liquids & gases
Type : Proprietary
Shape : Spheres

MEP-171 is typically utilized with MEP-191 in the Axens’ Multibedä Arsine System for arsenic removal from both liquid and gas phases. MEP-171 is a catalytic mass which acts as a protective layer for our MEP-191 arsine adsorbent. It provides wider tolerance to certain sulfur species compared to MEP-191 alone and permits high arsenic removal efficiency. MEP-171 prevents poisoning by heavy acidic sulfur compounds such as mercaptans.

Arsenic, which is often present as arsine (AsH₃) in light olefinic cuts from the FCC and selective steam cracker feeds, is a very strong poison for selective hydrogenation catalysts used for olefin purification. Therefore, elimination of any arsenic upstream of the catalytic bed to less than a few ppb is absolutely necessary for efficient catalyst performance.

MEP-171 used with MEP-191, allows:

· Full efficiency in the presence of mercaptans.

· No potential explosive reactions in the presence of acetylenes.

· High arsenic adsorption capacity.

· High macroporosity for minimal risk of pore condensation.