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Title: Tolerance and regeneration versus SO2 of Ba0.9A0.1Ti0.8Cu0.2O3 (A= Sr, Ca, Mg) LNT catalysts
Author: Albaladejo-Fuentes, Vicente
Sánchez Adsuar, María Salvadora
Illán Gómez, María José
Keywords: Catàlisi
Diòxid de sofre
Sulphur dioxide
Issue Date: 27-Mar-2019
Publisher: Elsevier B.V.
Abstract: In this paper, the tolerance and stability versus SO2 of Ba0.9A0.1Ti0.8Cu0.2O3 (A = Sr, Ca, Mg) perovskite-type catalysts for NOx storage application have been analyzed at 400 °C. Characterization results show that only strontium and magnesium are introduced into the perovskite structure. From those data, it can be concluded that the incorporation of Sr into the Ba0.9Sr0.1Ti0.8Cu0.2O3 catalyst promotes the generation of new NOx adsorption active sites. On the contrary, for Ba0.9Mg0.1Ti0.8Cu0.2O3 catalyst, copper is segregated from the catalyst lattice to the surface due to the incorporation of magnesium into the B site of the perovskite. The partial substitution of barium in Ba0.9Sr0.1Ti0.8Cu0.2O3 and Ba0.9Mg0.1Ti0.8Cu0.2O3 catalysts increases the NOx Storage Capacity (460 and 415 μmol/  in saturation conditions, respectively), stability and tolerance versus SO2 compared to the raw BaTi0.8Cu0.2O3 perovskite.
Note: Versió postprint del document publicat a:
It is part of: Applied Catalysis A-General, 2019, vol. 577, p. 113-123
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ISSN: 0926-860X
Appears in Collections:Articles publicats en revistes (Ciència dels Materials i Química Física)

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