Water–gas shift activity of pt catalysts prepared by different methods

Hilde Bjørkan; Magnus Rønning; Hilde J. Venvik; Tue Johannessen; Anders Holmen

doi:10.3390/catal10101132

Water–gas shift activity of pt catalysts prepared by different methods

Hilde Bjørkan
, Magnus Rønning
, Hilde J. Venvik
, Tue Johannessen
, Anders Holmen^*

^*Corresponding author for this work

Department of Chemical and Biochemical Engineering

Norwegian University of Science and Technology

Research output: Contribution to journal › Journal article › Research › peer-review

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Abstract

Platinum supported on ceria and zirconia was prepared through different preparation methods: Coprecipitation (CP), spray drying (SD), and flame spray pyrolysis (FSP). The catalysts were characterized by XRD, TPR, N₂ adsorption, and H₂ chemisorption, and the water–gas shift activity in the range 190–310◦ C and initial stability at 300–310◦ C were tested. Although the spray-dried Pt/CeO₂ /ZrO₂ catalyst shows the highest initial activity, it deactivates rapidly at 300◦ C and levels out at similar activity as the coprecipitated Pt/CeO₂ and Pt/CeO₂ /ZrO₂ within a few hours. Flame spray pyrolysis appears to be a promising preparation method concerning the stability of catalysts, although the initial activity is rather poor. High activity is related to high Pt dispersion, low reduction temperature, and small support particles. The support particle size is also much affected by the preparation method.

Original language	English
Article number	1132
Journal	Catalysts
Volume	10
Issue number	10
Number of pages	10
ISSN	2073-4344
DOIs	https://doi.org/10.3390/catal10101132
Publication status	Published - 2020

Bibliographical note

© 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

Keywords

Water–gas shift
Pt catalyst
Preparation
Spray drying
Flame spray pyrolysis

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title = "Water–gas shift activity of pt catalysts prepared by different methods",

abstract = "Platinum supported on ceria and zirconia was prepared through different preparation methods: Coprecipitation (CP), spray drying (SD), and flame spray pyrolysis (FSP). The catalysts were characterized by XRD, TPR, N2 adsorption, and H2 chemisorption, and the water–gas shift activity in the range 190–310◦ C and initial stability at 300–310◦ C were tested. Although the spray-dried Pt/CeO2 /ZrO2 catalyst shows the highest initial activity, it deactivates rapidly at 300◦ C and levels out at similar activity as the coprecipitated Pt/CeO2 and Pt/CeO2 /ZrO2 within a few hours. Flame spray pyrolysis appears to be a promising preparation method concerning the stability of catalysts, although the initial activity is rather poor. High activity is related to high Pt dispersion, low reduction temperature, and small support particles. The support particle size is also much affected by the preparation method.",

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AU - Bjørkan, Hilde

AU - Rønning, Magnus

AU - Venvik, Hilde J.

AU - Johannessen, Tue

AU - Holmen, Anders

N1 - © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

PY - 2020

Y1 - 2020

N2 - Platinum supported on ceria and zirconia was prepared through different preparation methods: Coprecipitation (CP), spray drying (SD), and flame spray pyrolysis (FSP). The catalysts were characterized by XRD, TPR, N2 adsorption, and H2 chemisorption, and the water–gas shift activity in the range 190–310◦ C and initial stability at 300–310◦ C were tested. Although the spray-dried Pt/CeO2 /ZrO2 catalyst shows the highest initial activity, it deactivates rapidly at 300◦ C and levels out at similar activity as the coprecipitated Pt/CeO2 and Pt/CeO2 /ZrO2 within a few hours. Flame spray pyrolysis appears to be a promising preparation method concerning the stability of catalysts, although the initial activity is rather poor. High activity is related to high Pt dispersion, low reduction temperature, and small support particles. The support particle size is also much affected by the preparation method.

AB - Platinum supported on ceria and zirconia was prepared through different preparation methods: Coprecipitation (CP), spray drying (SD), and flame spray pyrolysis (FSP). The catalysts were characterized by XRD, TPR, N2 adsorption, and H2 chemisorption, and the water–gas shift activity in the range 190–310◦ C and initial stability at 300–310◦ C were tested. Although the spray-dried Pt/CeO2 /ZrO2 catalyst shows the highest initial activity, it deactivates rapidly at 300◦ C and levels out at similar activity as the coprecipitated Pt/CeO2 and Pt/CeO2 /ZrO2 within a few hours. Flame spray pyrolysis appears to be a promising preparation method concerning the stability of catalysts, although the initial activity is rather poor. High activity is related to high Pt dispersion, low reduction temperature, and small support particles. The support particle size is also much affected by the preparation method.

KW - Water–gas shift

KW - Pt catalyst

KW - Preparation

KW - Spray drying

KW - Flame spray pyrolysis

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DO - 10.3390/catal10101132

M3 - Journal article

SN - 2073-4344

VL - 10

JO - Catalysts

JF - Catalysts

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ER -

Water–gas shift activity of pt catalysts prepared by different methods

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Keywords

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