The Impact of Sulphur, Phosphorus and their Co-effect on Pt/SiO2–ZrO2 Diesel Oxidation Catalysts

A. Väliheikki; T. Kolli; M. Honkanen; O. Heikkinen; M. Kärkkäinen; K. Kallinen; M. Huuhtanen; M. Vippola; J. Lahtinen; Riitta L. Keiski

doi:10.1007/s11244-016-0616-9

The Impact of Sulphur, Phosphorus and their Co-effect on Pt/SiO₂–ZrO₂ Diesel Oxidation Catalysts

A. Väliheikki^*, T. Kolli, M. Honkanen, O. Heikkinen, M. Kärkkäinen, K. Kallinen, M. Huuhtanen, M. Vippola, J. Lahtinen, Riitta L. Keiski

^*Tämän työn vastaava kirjoittaja

Tutkimustuotos: Lehtiartikkeli › Article › Scientific › vertaisarvioitu

7 Sitaatiot (Scopus)

Abstrakti

The effect of sulphur and phosphorus on a Pt/SiO₂–ZrO₂ catalyst was studied. The laboratory accelerated sulphur (SW) or phosphorus (PW), and their co-exposure (PSW) treatments were done in gas phase for 5 h at 400 °C. The fresh and treated catalysts were characterized by XPS, FESEM-EDS, TEM-EDS, BET and BJH. The catalyst activity was tested in lean diesel exhaust gas conditions by using a gas FTIR. The value of the light-off temperature of CO and C₃H₆ over the studied catalysts was as follows: fresh ~ SW < PSW < PW. These results can be explained by XPS and EDS results that revealed that the amount of adsorbed sulphur was much lower than the amount of phosphorus. Based on the BET and BJH results, bigger changes in the catalyst structure were observed after the PSW and PW treatments. Therefore, the impact of sulphur was negligible in comparison with phosphorus, and the sulphur actually inhibited the deactivation effect of phosphorus.

Alkuperäiskieli	Englanti
Sivut	307-311
Sivumäärä	5
Julkaisu	Topics in Catalysis
Vuosikerta	60
Numero	3-5
DOI - pysyväislinkit	https://doi.org/10.1007/s11244-016-0616-9
Tila	Julkaistu - 1 maalisk. 2017
OKM-julkaisutyyppi	A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

Pääsy asiakirjaan

10.1007/s11244-016-0616-9

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Link to publication in Scopus

Siteeraa tätä

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title = "The Impact of Sulphur, Phosphorus and their Co-effect on Pt/SiO2–ZrO2 Diesel Oxidation Catalysts",

abstract = "The effect of sulphur and phosphorus on a Pt/SiO2–ZrO2 catalyst was studied. The laboratory accelerated sulphur (SW) or phosphorus (PW), and their co-exposure (PSW) treatments were done in gas phase for 5 h at 400 °C. The fresh and treated catalysts were characterized by XPS, FESEM-EDS, TEM-EDS, BET and BJH. The catalyst activity was tested in lean diesel exhaust gas conditions by using a gas FTIR. The value of the light-off temperature of CO and C3H6 over the studied catalysts was as follows: fresh ~ SW < PSW < PW. These results can be explained by XPS and EDS results that revealed that the amount of adsorbed sulphur was much lower than the amount of phosphorus. Based on the BET and BJH results, bigger changes in the catalyst structure were observed after the PSW and PW treatments. Therefore, the impact of sulphur was negligible in comparison with phosphorus, and the sulphur actually inhibited the deactivation effect of phosphorus.",

keywords = "DOC, Phosphorus, Platinum, Silica-zirconia, Sulphur dioxide",

author = "A. V{\"a}liheikki and T. Kolli and M. Honkanen and O. Heikkinen and M. K{\"a}rkk{\"a}inen and K. Kallinen and M. Huuhtanen and M. Vippola and J. Lahtinen and Keiski, {Riitta L.}",

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doi = "10.1007/s11244-016-0616-9",

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journal = "Topics in Catalysis",

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TY - JOUR

T1 - The Impact of Sulphur, Phosphorus and their Co-effect on Pt/SiO2–ZrO2 Diesel Oxidation Catalysts

AU - Väliheikki, A.

AU - Kolli, T.

AU - Honkanen, M.

AU - Heikkinen, O.

AU - Kärkkäinen, M.

AU - Kallinen, K.

AU - Huuhtanen, M.

AU - Vippola, M.

AU - Lahtinen, J.

AU - Keiski, Riitta L.

PY - 2017/3/1

Y1 - 2017/3/1

N2 - The effect of sulphur and phosphorus on a Pt/SiO2–ZrO2 catalyst was studied. The laboratory accelerated sulphur (SW) or phosphorus (PW), and their co-exposure (PSW) treatments were done in gas phase for 5 h at 400 °C. The fresh and treated catalysts were characterized by XPS, FESEM-EDS, TEM-EDS, BET and BJH. The catalyst activity was tested in lean diesel exhaust gas conditions by using a gas FTIR. The value of the light-off temperature of CO and C3H6 over the studied catalysts was as follows: fresh ~ SW < PSW < PW. These results can be explained by XPS and EDS results that revealed that the amount of adsorbed sulphur was much lower than the amount of phosphorus. Based on the BET and BJH results, bigger changes in the catalyst structure were observed after the PSW and PW treatments. Therefore, the impact of sulphur was negligible in comparison with phosphorus, and the sulphur actually inhibited the deactivation effect of phosphorus.

AB - The effect of sulphur and phosphorus on a Pt/SiO2–ZrO2 catalyst was studied. The laboratory accelerated sulphur (SW) or phosphorus (PW), and their co-exposure (PSW) treatments were done in gas phase for 5 h at 400 °C. The fresh and treated catalysts were characterized by XPS, FESEM-EDS, TEM-EDS, BET and BJH. The catalyst activity was tested in lean diesel exhaust gas conditions by using a gas FTIR. The value of the light-off temperature of CO and C3H6 over the studied catalysts was as follows: fresh ~ SW < PSW < PW. These results can be explained by XPS and EDS results that revealed that the amount of adsorbed sulphur was much lower than the amount of phosphorus. Based on the BET and BJH results, bigger changes in the catalyst structure were observed after the PSW and PW treatments. Therefore, the impact of sulphur was negligible in comparison with phosphorus, and the sulphur actually inhibited the deactivation effect of phosphorus.

KW - DOC

KW - Phosphorus

KW - Platinum

KW - Silica-zirconia

KW - Sulphur dioxide

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