A simple method for CO chemisorption studies under continuous flow: Adsorption and desorption behavior of Pt/Al2O3 catalysts

Canan Karakaya; Olaf Deutschmann

doi:10.1016/j.apcata.2012.08.022

A simple method for CO chemisorption studies under continuous flow: Adsorption and desorption behavior of Pt/Al₂O₃ catalysts

Canan Karakaya, Olaf Deutschmann

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

46 Scopus citations

Abstract

A simple and rapid method for the determination of metal dispersion of technical catalysts is presented, which is based on temperature-programmed desorption (TPD) of pre-adsorbed CO in a continuous-flow reactor at atmospheric conditions. A commercial Pt/Al₂O₃ diesel oxidation catalyst is studied as an example. In the TPD spectra, desorption of CO as well as CO₂ is considered. Furthermore, a pulse adsorption technique is applied to better understand the adsorption-desorption behavior and the oxidation of CO. Metal dispersion based on the TPD methods presented agrees well with data derived from H₂ and CO chemisorption measurements using commercial set-ups.

Original language	English
Pages (from-to)	221-230
Number of pages	10
Journal	Applied Catalysis A: General
Volume	445-446
DOIs	https://doi.org/10.1016/j.apcata.2012.08.022
State	Published - Nov 28 2012
Externally published	Yes

Funding

The authors would like to thank Dr. Peter Pfeifer (KIT, Institute of Micro Process Engineering) for the H 2 chemisorption measurements and the company Umicore AG & Co. KG for providing the catalyst. Financial support by the Deutsche Forschungsgemeinschaft (DFG) is gratefully acknowledged.

Funders	Funder number
Deutsche Forschungsgemeinschaft

Keywords

Adsorption
CO chemisorption
Desorption
Metal dispersion
Pt/AlO

Access to Document

10.1016/j.apcata.2012.08.022

Cite this

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title = "A simple method for CO chemisorption studies under continuous flow: Adsorption and desorption behavior of Pt/Al2O3 catalysts",

abstract = "A simple and rapid method for the determination of metal dispersion of technical catalysts is presented, which is based on temperature-programmed desorption (TPD) of pre-adsorbed CO in a continuous-flow reactor at atmospheric conditions. A commercial Pt/Al2O3 diesel oxidation catalyst is studied as an example. In the TPD spectra, desorption of CO as well as CO2 is considered. Furthermore, a pulse adsorption technique is applied to better understand the adsorption-desorption behavior and the oxidation of CO. Metal dispersion based on the TPD methods presented agrees well with data derived from H2 and CO chemisorption measurements using commercial set-ups.",

keywords = "Adsorption, CO chemisorption, Desorption, Metal dispersion, Pt/AlO",

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AU - Deutschmann, Olaf

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AB - A simple and rapid method for the determination of metal dispersion of technical catalysts is presented, which is based on temperature-programmed desorption (TPD) of pre-adsorbed CO in a continuous-flow reactor at atmospheric conditions. A commercial Pt/Al2O3 diesel oxidation catalyst is studied as an example. In the TPD spectra, desorption of CO as well as CO2 is considered. Furthermore, a pulse adsorption technique is applied to better understand the adsorption-desorption behavior and the oxidation of CO. Metal dispersion based on the TPD methods presented agrees well with data derived from H2 and CO chemisorption measurements using commercial set-ups.

KW - Adsorption

KW - CO chemisorption

KW - Desorption

KW - Metal dispersion

KW - Pt/AlO

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