CATALYST GAUZE
A catalyst gauze for an ammonia oxidation process is described, containing a first layer of knitted first wire material, whereby said first wire material is made from a platinum-rhodium alloy, characterized in that said first layer contains an activator in the form of a second wire material which is knitted among the first wire material and which is made from un-alloyed platinum.
1 . A catalyst gauze for an ammonia oxidation process, containing a first layer of knitted first wire material, wherein said first wire material is made from a platinum-rhodium alloy, wherein said first layer contains an activator in the form of a second wire material which is knitted among the first wire material and which is made from un-alloyed platinum and the weight percentage of the activator second wire material in the catalyst gauze is in the range of 1 to 45% by weight.
2 . The catalyst gauze according to claim 1 , wherein the first wire material is made from a Pt-Rh alloy with 1 to 10% by weight Rh.
3 . The catalyst gauze according to claim 1 , wherein the second wire material is made from ≥99.5% by weight Pt.
4 . The catalyst gauze according to claim 1 , wherein the weight percentage of the activator second wire material in the catalyst gauze is in the range of 1 to 33% by weight.
5 . The catalyst gauze according to claim 1 , wherein the weight percentage of the activator second wire material in the catalyst gauze is in the range of 8 to 35% by weight.