Method and apparatus for reducing nitrous oxide
AssigneeW. C. Heraeus GmbH
InventorsMarek Gorywoda, David Francis Lupton, Jonathan Lund
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Abstract
A process and a device for reducing the nitrous oxide which is formed during the catalytic combustion of ammonia and oxygen to form nitrogen oxides. A catalyst system including at least one first catalyst mesh element and at least one second catalyst mesh element is used for the catalytic combustion of ammonia and oxygen to form nitrogen oxides, where the minimum of one first catalyst mesh element is a platinum-rhodium mesh and the minimum of one second, downstream catalyst mesh element is a palladium-rhodium mesh with 2-4 wt. % of rhodium.
Claims14
A process for reducing nitrous oxide which is formed during catalytic combustion of ammonia and oxygen to form nitrogen oxides, comprising the step of catalytically combusting ammonia and oxygen to form nitrogen oxides in a catalyst system having at least one first catalyst mesh element and at least one second catalyst mesh element, the at least one first catalyst mesh element including a platinum-rhodium mesh, the at least one second, downstream catalyst mesh element including a palladium-rhodium mesh with at least 92 wt. % palladium, 2-4 wt. % rhodium, and a remainder platinum.
A process for reducing nitrous oxide which is formed during catalytic combustion of ammonia and oxygen to form nitrogen oxides, comprising the step of catalytically combusting ammonia and oxygen to form nitrogen oxides in a catalyst system having at least one first catalyst mesh element and at least one second catalyst mesh element, the at least one first catalyst mesh element including a platinum-rhodium mesh, the at least one second, downstream catalyst mesh element including a palladium-rhodium mesh with 82-83 wt. % palladium, 2.5-3.5 wt. % rhodium, and a remainder platinum.
A device for reducing nitrous oxide which is formed during catalytic combustion of ammonia and oxygen to form nitrogen oxides, comprising a catalyst system having at least one first catalyst mesh element and at least one second catalyst mesh element for the catalytic combustion of ammonia and oxygen to form nitrogen oxides, the at least one first catalyst mesh element including a platinum-rhodium mesh, the at least one second, downstream catalyst mesh element including a palladium-rhodium mesh with at least 92 wt. % palladium, 2-4 wt. % rhodium, and a remainder platinum.
A device for reducing nitrous oxide which is obtained during catalytic combustion of ammonia and oxygen to form nitrogen oxides, comprising a catalyst system having at least one first catalyst mesh element and at least one second catalyst mesh element for the catalytic combustion of ammonia and oxygen to form nitrogen oxides, the at least one first catalyst mesh element including a platinum-rhodium mesh, the at least one second, downstream catalyst mesh element including a palladium-rhodium mesh with 82-83 wt. % palladium, 2.5-3.5 wt. % rhodium, and a remainder platinum.
Dependencies are inferred from the claim text.