FIRST STAGE FOR AMMONIA OXIDATION CATALYST SYSTEM Russian patent published in 2010 - IPC C01B21/28 

FIELD: chemistry.

SUBSTANCE: first stage for ammonia oxidation catalyst system consisting of a layer of catalyst nettings from platinum alloys is divided into two parts, where one part, the first along the gas flow path, does not lie in the plane of the circle and is made from at least one corrugated catalyst netting whose corrugation is laid on a shape-generating supporting netting made from series-joined elements with a triangular shape with ratio of the height to the base equal to 2-12, and the second part lies in the plane of the circle. The corrugated catalyst netting is woven or knitted with thin plaiting, where the knitted netting contains 16-60 wires on the perimeter of the a square with area of 1 cm² and has the same free cross section as the woven netting with 16-225 plaits/cm². The corrugated catalyst netting is made from alloys containing: 40-90% palladium, 0.7-3.0% ruthenium, up to 0.3% iridium, up to 0.15% impurities, platinum - the rest.

EFFECT: device increases conversion of ammonia to NO.

4 cl, 1 tbl, 2 dwg