Patent ID: 7258137

Claim:
An apparatus for separately conveying two gases through a single artifact, comprising: a first component having an inlet plate with an inlet surface and an outlet plate with an outlet surface, the inlet and outlet plates being spaced apart from each other to define an interior having a perimeter that is at least partially exposed to an exterior of the first component, and the first component also having a plurality of integral columns extending between the inlet and outlet plates that are accessible from the perimeter; a first set of passages formed in each of the plates and extending contiguously through at least some of the columns between the inlet and outlet surfaces for conveying a first gas; a second set of passages formed in each of the plates and extending contiguously around at least some of the columns in the interior between the inlet and outlet surfaces, and the second set of passages being completely fluidically isolated from the first set of passages for conveying a second gas, such that the first and second set of passages are separated by a material seal coating without the presence of a mechanical seal; a second component secured to the first component to seal the interior of the first component and capture the second set of passages to form a single component that receives two, initially separate gases, and conveys the two gases separately from the inlet surface to the outlet surface, such that the two gases mix and react in a controlled manner upon exiting at the outlet surface; and both the first and second components are formed from a high temperature material selected from the group consisting of graphite, SiC, and pyrolytic graphite-coated graphite.