| abstract |
The present invention relates to a catalyst carrier comprising an apatite-type composite oxide and proposes a catalyst carrier capable of improving purification performance of NOx due to improvement of phosphorus poisoning. n Proposed is a catalyst carrier which contains a composite oxide that is represented by a composition formula of (LaA) 9.33-δ B 6 O 27.00-γ (wherein, 0.3≦δ≦3.0, 0.0<γ≦6.0; “A” represents one or two or more elements selected from Ba, Pr, Y, Sr, Mg, and Ce; and “B” represents one or two or more elements selected from Si, P, and Fe). |