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Sulfur-tolerant BaO/ZrO2/TiO2/Al2O3 quaternary mixed oxides for deNOX catalysis

Zafer Say ; Oana Mihai (Kompetenscentrum katalys (KCK) ; Institutionen för kemi och kemiteknik, Kemisk reaktionsteknik) ; Merve Tohumeken ; Kerem Emre Ercan ; Louise Olsson (Kompetenscentrum katalys (KCK) ; Institutionen för kemi och kemiteknik, Kemisk reaktionsteknik) ; Emrah Ozensoy
Catalysis Science and Technology (2044-4753). Vol. 7 (2017), 1, p. 133-144.
[Artikel, refereegranskad vetenskaplig]

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.



Denna post skapades 2017-01-30. Senast ändrad 2017-09-14.
CPL Pubid: 247861

 

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Institutioner (Chalmers)

Kompetenscentrum katalys (KCK)
Institutionen för kemi och kemiteknik, Kemisk reaktionsteknik

Ämnesområden

Kemi

Chalmers infrastruktur