PURIFICATION DEVICE FOR EXHAUST GAS, PURIFICATION METHOD FOR EXHAUST GAS, AND PURIFICATION CATALYST

摘要

PROBLEM TO BE SOLVED: To provide a new purification device of exhaust gas suitable when the purification of NOx is carried out by using carbon monoxide or hydrocarbon in a heat engine operated in an atmosphere where the amount of oxygen is larger than a stoichiometric amount, and also to provide a purification method of exhaust gas, and further to provide a purification catalyst of the NOx.

SOLUTION: In the purification device of the exhaust gas where the purification catalyst of the NOx for reducing and purifying nitrogen oxide in the exhaust gas by using the carbon monoxide or the hydrocarbon is provided in the exhaust gas flow path of the heat engine into which the exhaust gas having an atmosphere containing the amount of oxygen larger than the stoichiometric amount flows, the purification catalyst of the exhaust gas has a porous support and a catalytically active component supported on the porous support. An average pore diameter has the distribution of pores of ≥20 Å and ≤100 Å, and at least one kind selected from vanadium, niobium, tantalum, and tin is contained as the catalytically active component.

COPYRIGHT: (C)2009,JPO&INPIT