Mechanism of Low-Temperature NOx Storage for Reducing NOx Cold Start Emission

Mechanism of Low-Temperature NOx Storage for Reducing NOx Cold Start Emission Full article

Journal

Topics in Catalysis
ISSN: 1022-5528 , E-ISSN: 1572-9028

Output data

Year: 2016, Volume: 59, Number: 10-12, Pages: 931-937 Pages count : 7 DOI: 10.1007/s11244-016-0571-5

Authors

Stakheev A.Yu. ¹ , Mashkovsky I.S. ¹ , Bragina G.O. ¹ , Baeva G.N. ¹ , Telegina N.S. ¹ , Malmstrøm Larsen K. ² , Kustov A.L. ² , Thøgersen J.R. ²

Affiliations

1	Zelinsky Institute of Organic Chemistry RAS, Leninsky Prospect 47, Moscow, Russia, 119991
2	Haldor Topsøe A/S, Haldor Topsøe Alle 1, 2800, Lyngby, Denmark

Low-temperature NO storage process over Pt/CeO2–ZrO2 was studied in detail by the isothermal adsorption and the temperature-programmed adsorption measurement mimicking cold start of the real diesel engine. Maximal NOx storage capacity determined by saturation of Pt/Ce–Zr at 120 °C approaches ~0.18 mmol/g (8.5 /kgcat). TPD and in situ FTIR study indicated that NO is stored over catalyst surface as nitrite ( )surf and nitrate ()surf species. NOx storage capacity was found to be a function of NO inlet concentration in accordance with the relationship: NOstored ~ [NOx,inlet]0.4. CO2 significantly deteriorates NOx storage at 100–200 °C presumably due to formation of surface carbonate species decomposed above 200–250 °C.

Stakheev A.Y. , Mashkovsky I.S. , Bragina G.O. , Baeva G.N. , Telegina N.S. , Malmstrøm Larsen K. , Kustov A.L. , Thøgersen J.R.
Mechanism of Low-Temperature NOx Storage for Reducing NOx Cold Start Emission
Topics in Catalysis. 2016. V.59. N10-12. P.931-937. DOI: 10.1007/s11244-016-0571-5 WOS Scopus OpenAlex

Web of science:	WOS:000379830300016
Scopus:	2-s2.0-84977136787
OpenAlex:	W2470812023

DB	Citing
OpenAlex	7
Scopus	7
Web of science	6