Patent ID: 7132011

Claim:
A gas filter for a reactive gas comprising: a container comprising a substantially cylindrical tube portion having an inlet end, an outlet end, and an internal charter; an inlet port having an inlet particle filter that extends into the internal chamber; an outlet port having an outlet particle filter that extends into the internal chamber; and a filter media that fills the internal charter, the gas filter supplying an output gas stream having a concentration of ammonia of no greater than about 1 ppbv and a concentration of sulfur dioxide no greater than about 1 ppbv for an input gas stream having a concentration of ammonia no greater than about 10 ppbv and a concentration of sulfur dioxide no greater than about 5 ppbv, the gas filter having a pressure drop of no greater than about 35 psi for an input gas stream pressure in the range from about 70 psi to about 100 psi and an inlet gas stream flow rate in the range from about 20 slpm to about 50 slpm.