Patent ID: 6506352
Filing Date: 2003-01-14
Classification: B01D

Abstract:
A method of depleting excess reactant from an exhaust flow, comprising:reacting a first part of a gaseous reactant with at least one substrate within a primary reaction space, wherein said reacting comprises an atomic layer deposition (ALD) process; exhausting an excess part of the gaseous reactant that has not reacted with said at least one substrate to a secondary reaction space downstream of the primary reaction space; further reacting the excess part of the gaseous reactant with a material having a surface area between about 10 m2/g and 2000 m2/g, wherein said further reacting comprises an ALD process; and exhausting by-product from reacting the first part of a gaseous material and from further reacting the excess part of the gaseous material from the secondary reaction space.