Gas treatment device and system, and method for making the same

摘要

One embodiment of a gas treatment device comprises: a substrate; a housing disposed concentrically about the substrate, the housing comprising a first portion having a decreasing internal diameter from a first end to a main body portion, the main body portion extending from the first portion; and a mat support material disposed concentrically about the substrate to form a subassembly, wherein the subassembly is at least partially disposed in the main body portion. One embodiment of a method for producing the gas treatment device comprises: disposing a mat support material about a substrate to form a subassembly; passing at least a portion of the subassembly into a main body portion of a housing comprising a first portion having a decreasing internal diameter from a first end to the main body portion, the main body portion extending from the first portion.