Potassium-copper perovskite catalysts for mild temperature diesel soot combustion
PBN-AR
Instytucja
Wydział Chemiczny (Politechnika Wrocławska)
Informacje podstawowe
Główny język publikacji
eng
Czasopismo
APPLIED CATALYSIS A-GENERAL
ISSN
0926-860X
EISSN
Wydawca
DOI
URL
Rok publikacji
2014
Numer zeszytu
Strony od-do
214-221
Numer tomu
vol. 485
Identyfikator DOI
Liczba arkuszy
Autorzy
(liczba autorów: 4)
Pozostali autorzy
+ 3
Słowa kluczowe
pol
sadza
spalanie
perowskity
katalizator
Streszczenia
Język
eng
Treść
The activity and stability of potassium-copper perovskite catalysts for soot combustion were analysed at 450 °C in a NOx/O2 gas mixture. Both impregnated (K-Cu/SrTiO3) and substituted (SrKTiCuO3) copper-potassium catalysts were prepared. For comparative purpose, also a potassium substituted catalyst (SrKTiO3) was studied. The high activity of the fresh potassium catalyst (SrKTiO3) is based on the volatile potassium species reaching the surface of soot. However, this catalyst is not useful because potassium is progressively lost during the reaction. Potassium was stabilized by copper and, as a consequence, the two potassium-copper perovskite catalysts present a constant activity for the soot combustion. The activity of the potassium-copper perovskite catalysts, which is maintained during consecutive reactions, is related to their NO2 production capacity. The metal addition method seems to influence the catalysts performance, the substituted catalyst (SrKTiCuO3) being the most active and stable.
Inne
System-identifier
000194584
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