Sulfur-tolerant BaO/ZrO2/TiO2/Al2O3 quaternary mixed oxides for deNOX catalysis
Artikel i vetenskaplig tidskrift, 2017

Advanced quaternary mixed oxide materials in the form of BaO/Al2O3/ZrO2/TiO2 functionalized with Pt active sites (i.e. Pt/BaO/AZT) were synthesized and structurally characterized via XRD and BET in comparison to a conventional Pt/20BaO/Al benchmark NSR/LNT catalyst. The interactions of these catalysts' surfaces with SOx and NOx gases were monitored via in situ FTIR and TPD. There exists a delicate trade-off between NOx storage capacity (NSC) and sulfur uptake/poisoning which is strongly governed by the BaO loading/dispersion as well as the surface structure and acidity of the support material. Flow reactor measurements performed under realistic catalytic conditions show the high NOx activity for the Pt/20BaO/AZT catalyst at 573 K. After sulfur poisoning and subsequent regeneration at 773 and 973 K, Pt/20BaO/AZT surpassed the NOx catalytic performance at 573 K of all other investigated materials including the conventional Pt/20BaO/Al benchmark catalyst. © The Royal Society of Chemistry 2017.

Författare

Zafer Say

Bilkent Universitesi

Oana Mihai

Kompetenscentrum katalys (KCK)

Kemi och kemiteknik, Kemiteknik, Kemisk reaktionsteknik

Merve Tohumeken

Bilkent Universitesi

Kerem Emre Ercan

Bilkent Universitesi

Louise Olsson

Kompetenscentrum katalys (KCK)

Kemi och kemiteknik, Kemiteknik, Kemisk reaktionsteknik

Emrah Ozensoy

Bilkent Universitesi

Catalysis Science and Technology

2044-4753 (ISSN) 2044-4761 (eISSN)

Vol. 7 133-144

Fundament

Grundläggande vetenskaper

Ämneskategorier

Kemi

DOI

10.1039/c6cy01898j