Patent ID: 8295692

Claim:
A system for controlling the flow of a feed gas through a passageway containing one or more heating elements, comprising: a tubular housing defining the passageway, the tubular housing having an interior surface; means for introducing the feed gas into the passageway; and a plurality of baffle assemblies for impeding the flow of the inlet stream of gas within the passageway, each of the baffle assemblies comprising: a first baffle element that defines one or more first passageways; a second baffle element that defines one or more second passageways; and a connector coupled between the first and second baffle elements, the connector positioning the first and second baffle elements in different planes; wherein the first baffle element comprises an outer peripheral arcuate portion that mates with a portion of the interior surface of the tubular housing and another peripheral portion that does not mate with the interior surface of the tubular housing; and wherein the second baffle element comprises an outer peripheral arcuate portion that mates with a portion of the interior surface of the tubular housing and another peripheral portion that does not mate with the interior surface of the tubular housing.