Reactivation of sintered Pt/Al2O3 oxidation catalysts

F. Cabello Galisteo; R. Mariscal; M. López Granados; J. L. G. Fierro; R. A. Daley; J. A. Anderson

doi:10.1016/j.apcatb.2005.02.004

Reactivation of sintered Pt/Al₂O₃ oxidation catalysts

F. Cabello Galisteo^*, R. Mariscal, M. López Granados, J. L. G. Fierro, R. A. Daley, J. A. Anderson

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

55 Citations (Scopus)

Abstract

The reactivation of thermally sintered Pt/Al₂O₃ catalysts used in the simultaneous oxidation of CO and propene has been achieved by an oxychlorination treatment. The catalyst can be considered to model the active component of the catalytic converter fitted to diesel driven cars. Platinum crystallites redispersion was verified by XRD, H₂ chemisorption, TEM and FTIR. The extent of regeneration reflects the platinum particle redispersion achieved by such a treatment. Oxychlorination also introduced electronic effects in the Pt particle caused by the presence of chlorine at the Pt-Al₂O₃ interface but no detrimental result of this was observed in the oxidation reactions. The results indicate that the deactivation of the diesel oxidation catalysts (DOCs) can be reverted by this simple treatment resulting in a remarkable recovery of the catalytic activity.

Original language	English
Pages (from-to)	227-233
Number of pages	7
Journal	Applied Catalysis B: Environmental
Volume	59
Issue number	3-4
DOIs	https://doi.org/10.1016/j.apcatb.2005.02.004
Publication status	Published - 8 Aug 2005

Keywords

Diesel oxidation catalyst
Oxychlorination
Platinum
Reactivation
Sintering

ASJC Scopus subject areas

Catalysis
General Environmental Science
Process Chemistry and Technology

Access to Document

10.1016/j.apcatb.2005.02.004

Cite this

@article{9534f13995984b029d3e15768cd0d9cb,

title = "Reactivation of sintered Pt/Al2O3 oxidation catalysts",

abstract = "The reactivation of thermally sintered Pt/Al2O3 catalysts used in the simultaneous oxidation of CO and propene has been achieved by an oxychlorination treatment. The catalyst can be considered to model the active component of the catalytic converter fitted to diesel driven cars. Platinum crystallites redispersion was verified by XRD, H2 chemisorption, TEM and FTIR. The extent of regeneration reflects the platinum particle redispersion achieved by such a treatment. Oxychlorination also introduced electronic effects in the Pt particle caused by the presence of chlorine at the Pt-Al2O3 interface but no detrimental result of this was observed in the oxidation reactions. The results indicate that the deactivation of the diesel oxidation catalysts (DOCs) can be reverted by this simple treatment resulting in a remarkable recovery of the catalytic activity.",

keywords = "Diesel oxidation catalyst, Oxychlorination, Platinum, Reactivation, Sintering",

author = "{Cabello Galisteo}, F. and R. Mariscal and {L{\'o}pez Granados}, M. and Fierro, {J. L. G.} and Daley, {R. A.} and Anderson, {J. A.}",

note = "Funding Information: Financial support from the Comunidad de Madrid (07M/0081/2002) is gratefully acknowledged. F.C.G. thanks the Spanish Ministerio de Educaci{\'o}n y Ciencia for a FPU fellowship.",

year = "2005",

month = aug,

day = "8",

doi = "10.1016/j.apcatb.2005.02.004",

language = "English",

volume = "59",

pages = "227--233",

journal = "Applied Catalysis B: Environmental",

issn = "0926-3373",

publisher = "Elsevier",

number = "3-4",

}

TY - JOUR

T1 - Reactivation of sintered Pt/Al2O3 oxidation catalysts

AU - Cabello Galisteo, F.

AU - Mariscal, R.

AU - López Granados, M.

AU - Fierro, J. L. G.

AU - Daley, R. A.

AU - Anderson, J. A.

N1 - Funding Information: Financial support from the Comunidad de Madrid (07M/0081/2002) is gratefully acknowledged. F.C.G. thanks the Spanish Ministerio de Educación y Ciencia for a FPU fellowship.

PY - 2005/8/8

Y1 - 2005/8/8

N2 - The reactivation of thermally sintered Pt/Al2O3 catalysts used in the simultaneous oxidation of CO and propene has been achieved by an oxychlorination treatment. The catalyst can be considered to model the active component of the catalytic converter fitted to diesel driven cars. Platinum crystallites redispersion was verified by XRD, H2 chemisorption, TEM and FTIR. The extent of regeneration reflects the platinum particle redispersion achieved by such a treatment. Oxychlorination also introduced electronic effects in the Pt particle caused by the presence of chlorine at the Pt-Al2O3 interface but no detrimental result of this was observed in the oxidation reactions. The results indicate that the deactivation of the diesel oxidation catalysts (DOCs) can be reverted by this simple treatment resulting in a remarkable recovery of the catalytic activity.

AB - The reactivation of thermally sintered Pt/Al2O3 catalysts used in the simultaneous oxidation of CO and propene has been achieved by an oxychlorination treatment. The catalyst can be considered to model the active component of the catalytic converter fitted to diesel driven cars. Platinum crystallites redispersion was verified by XRD, H2 chemisorption, TEM and FTIR. The extent of regeneration reflects the platinum particle redispersion achieved by such a treatment. Oxychlorination also introduced electronic effects in the Pt particle caused by the presence of chlorine at the Pt-Al2O3 interface but no detrimental result of this was observed in the oxidation reactions. The results indicate that the deactivation of the diesel oxidation catalysts (DOCs) can be reverted by this simple treatment resulting in a remarkable recovery of the catalytic activity.

KW - Diesel oxidation catalyst

KW - Oxychlorination

KW - Platinum

KW - Reactivation

KW - Sintering

UR - http://www.scopus.com/inward/record.url?scp=19544377650&partnerID=8YFLogxK

U2 - 10.1016/j.apcatb.2005.02.004

DO - 10.1016/j.apcatb.2005.02.004

M3 - Article

AN - SCOPUS:19544377650

SN - 0926-3373

VL - 59

SP - 227

EP - 233

JO - Applied Catalysis B: Environmental

JF - Applied Catalysis B: Environmental

IS - 3-4

ER -