CATALYTIC FILTER MATERIAL AND METHOD OF MAKING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide an improved catalytic filter material for use in removing contaminants such as NOxfrom a fluid stream.

SOLUTION: The catalytic filter material for use in a fluid stream comprises multiple fibers coming from a tow drawn yarn, each comprising catalytic particles attached within the node and fibril structure of a stretched expanded PTFE polymer. The multiple fibers of stretched expanded PTFE polymer and catalytic particles are combined to form a coherent catalytic filter material. A sheet of a microporous membrane is mounted on at least one side of the coherent catalytic filter material. The sheet has a pore structure sufficiently small enough to serve as a barrier to isolate particles in the fluid stream away from the catalytic filter material. The catalytic filter material removes particles like soot from the fluid flow before the dust can clog active catalytic sites and effectively catalytically converts undesirable contaminants in the fluid stream to acceptable end products.

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