CATCHMENT PACKS

摘要

A catchment pack suitable for use in an ammonia oxidation reactor has a predetermined geometric shape and comprises two or more catchment pack segments (10) located in planar edge-to-edge relationship one with another, each of said catchment pack segments (10) comprising support gauze segments (11, 12) interleaved with one or more pads (13, 14, 15) of wire formed from a getter material, such as palladium-gold alloy.