Patent ID: 9162216
Filing Date: 2015-10-20
Classification: B01D,B01J,C23C

Abstract:
1. A catalytic composition for the direct decomposition of NO to N 2 and O 2 , comprising: a) an austenitic acid proof steel substrate containing no more than: 0.1 wt. % of C; 2.0 wt. % of Mn; 0.8 wt. % of Si; 0.045 wt. % of P; 0.03 wt. % of S; 0.3 wt. % of Cu; 19.0 wt. % of Cr; 10.0 wt. % of Ni and 0.8 wt. % of Ti; and b) a biphasic oxide outer layer on the austenitic acid proof steel substrate, having 64-72 wt. % of a first phase and 28%-36% of a second phase, wherein the first phase of the biphasic oxide outer layer has an αFe wherein the second phase of the biphasic oxide outer layer has a spinel crystal structure with lattice parameters substantially similar to NiFe