The nitrogen oxide removal catalytic converter being included in the burnup exhaust gas of the Diesel engine and the nitrogen oxide removal mannered null tellurium which uses

摘要

PROBLEM TO BE SOLVED: To enable an activity for removing a nitrogen oxide (DeNO_x activity) to be displayed in a low temperature area and the DeNO_x activity to be maintained even in a wide temperature range by forming a composition containing tellurium, platinum and a fire-resistant inorganic oxide. ;SOLUTION: This catalyst for removing a nitrogen oxide contains preferably 0.1-5 wt.% of platinum, more preferably 0.5-2 wt.%, and preferably, 0.05-5 wt.% of tellurium, more preferably 0.1-2 wt.% for a fire-resistant inorganic oxide. For the raw material compound of platinum to be used, dinitrodiamine platinum, platinum chloride and the like are named and form the raw material of tellurium to be used, telluric acid, sodium tellurate (Na₂TeO₃) and the like are named. In addition, the fire-resistant inorganic oxide to be used is, for example, alumina, titania or the like. But alumina is preferred. This catalyst for removing a nitrogen oxide is obtained by coating a honeycomb structure as a catalyst of the honeycomb structure. The preferred honeycomb structure is a honeycomb structure of cordierite.;COPYRIGHT: (C)1999,JPO