Abstract:
본발명은, 하기화학식 (I)의삼원계금속간화합물입자를포함하는촉매로서, 이때상기삼원계금속간화합물입자는지지체상에지지되는촉매: XYZ (I)(이때 X, Y 및 Z는서로상이하고; X는 Mn, Fe, Co, Ni, Cu 및 Pd로이루어진군으로부터선택되고; Y는 V, Mn, Cu, Ti 및 Fe로이루어진군으로부터선택되고; Z는 Al, Si, Ga, Ge, In, Sn 및 Sb로이루어진군으로부터선택됨), 뿐만아니라그의제조방법및 그의촉매로서의용도, 특히카보닐화합물및 메틸렌기함유화합물의축합공정또는배기가스내 질소산화물의선택적접촉환원을위한촉매로서의용도에관한것이다.
Abstract:
A process for the production of mixed oxide particles comprising: (1) providing a dispersion comprising a disperse phase and a continuous phase, wherein the disperse phase comprises one or more precursor compounds of ceria, one or more precursor compounds of zirconia, and one or more precursor compounds of one or more rare earth oxides other than ceria and/or one or more precursor compounds of yttria; (2) forming an aerosol of the dispersion provided in step (1); and (3) pyrolyzing the aerosol of step (2) to obtain mixed oxide particles, as well as to mixed oxide particles obtainable from flame spray pyrolysis, and preferably obtainable by the process and to its use.
Abstract:
The present invention relates to a composite oxide comprising ceria, praseodymia and alumina, wherein the cerium : praseodymium molar ratio of the composite oxide is 84:16 or less, as well as to a method of preparing the composite oxide and to its use, in particular in a method of treating an exhaust gas stream.