Patent ID: 7514055
Filing Date: 2009-04-07
Classification: B01D,B01J,F01N,Y02A,Y02T,Y10S

Abstract:
1. A method of controlling gaseous emissions from Diesel cycle internal combustion engines, said method comprising contacting the gaseous emissions from the Diesel cycle internal combustion engine with a perovskite-type catalyst consisting essentially of a metal oxide composition represented by the general formula: wherein A is a mixture of elements originally in the form of a single phase mixed lanthanide collected from bastnasite; B is a divalent or monovalent cation; M is at least one element selected from the group consisting of elements of an atomic number of from 22 to 30, 40 to 51, and 73 to 80; a is 1 or 2; b is 3 when a is 1 or b is 4 when a is 2; and x is a number defined by 0.1≦x<0.7.