H2 oxidation as criterion for PrOx catalyst selection: Examples based on Au-CoOx-supported systems

Tomás Ramírez Reina; Cristina Megías-Sayago; Alejandro Pérez Florez; Svetlana Ivanova; Miguel Ángel Centeno; José Antonio Odriozola

doi:10.1016/j.jcat.2015.03.015

H₂ oxidation as criterion for PrOx catalyst selection: Examples based on Au-CoO_x-supported systems

Tomás Ramírez Reina
, Cristina Megías-Sayago
, Alejandro Pérez Florez
, Svetlana Ivanova
, Miguel Ángel Centeno
, José Antonio Odriozola

Department of Chemistry

Universidad de Sevilla

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

22 Scopus citations

Abstract

A new approach for understanding PrOx reaction over gold catalysts is proposed in this work. The competition between H₂ and CO oxidation has been studied over a series of Au/MO_x/Al₂O₃ (M = Ce and Co) catalysts in simulated post-reforming gas stream, containing H₂O and CO₂ for H₂ cleanup goals. The catalysts' behavior is correlated to their oxygen storage capacity, redox behavior, and oxidation ability. The estimation of the reaction rates reveals that in these solids the H₂ combustion, the selectivity limiting factor in the PrOx process, is mainly controlled by the support and not by the gold presence. The possible use of the hydrogen oxidation reaction as a catalyst selection criterion is discussed.

Original language	English
Pages (from-to)	161-171
Number of pages	11
Journal	Journal of Catalysis
Volume	326
DOIs	https://doi.org/10.1016/j.jcat.2015.03.015
State	Published - 01 Jun 2015

Keywords

CO removal
Gold catalysts
H oxidation
PrOx

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10.1016/j.jcat.2015.03.015

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title = "H2 oxidation as criterion for PrOx catalyst selection: Examples based on Au-CoOx-supported systems",

abstract = "A new approach for understanding PrOx reaction over gold catalysts is proposed in this work. The competition between H2 and CO oxidation has been studied over a series of Au/MOx/Al2O3 (M = Ce and Co) catalysts in simulated post-reforming gas stream, containing H2O and CO2 for H2 cleanup goals. The catalysts' behavior is correlated to their oxygen storage capacity, redox behavior, and oxidation ability. The estimation of the reaction rates reveals that in these solids the H2 combustion, the selectivity limiting factor in the PrOx process, is mainly controlled by the support and not by the gold presence. The possible use of the hydrogen oxidation reaction as a catalyst selection criterion is discussed.",

keywords = "CO removal, Gold catalysts, H oxidation, PrOx",

author = "Reina, \{Tom{\'a}s Ram{\'i}rez\} and Cristina Meg{\'i}as-Sayago and Florez, \{Alejandro P{\'e}rez\} and Svetlana Ivanova and Centeno, \{Miguel {\'A}ngel\} and Odriozola, \{Jos{\'e} Antonio\}",

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doi = "10.1016/j.jcat.2015.03.015",

language = "English",

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journal = "Journal of Catalysis",

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TY - JOUR

T1 - H2 oxidation as criterion for PrOx catalyst selection

T2 - Examples based on Au-CoOx-supported systems

AU - Reina, Tomás Ramírez

AU - Megías-Sayago, Cristina

AU - Florez, Alejandro Pérez

AU - Ivanova, Svetlana

AU - Centeno, Miguel Ángel

AU - Odriozola, José Antonio

PY - 2015/6/1

Y1 - 2015/6/1

N2 - A new approach for understanding PrOx reaction over gold catalysts is proposed in this work. The competition between H2 and CO oxidation has been studied over a series of Au/MOx/Al2O3 (M = Ce and Co) catalysts in simulated post-reforming gas stream, containing H2O and CO2 for H2 cleanup goals. The catalysts' behavior is correlated to their oxygen storage capacity, redox behavior, and oxidation ability. The estimation of the reaction rates reveals that in these solids the H2 combustion, the selectivity limiting factor in the PrOx process, is mainly controlled by the support and not by the gold presence. The possible use of the hydrogen oxidation reaction as a catalyst selection criterion is discussed.

AB - A new approach for understanding PrOx reaction over gold catalysts is proposed in this work. The competition between H2 and CO oxidation has been studied over a series of Au/MOx/Al2O3 (M = Ce and Co) catalysts in simulated post-reforming gas stream, containing H2O and CO2 for H2 cleanup goals. The catalysts' behavior is correlated to their oxygen storage capacity, redox behavior, and oxidation ability. The estimation of the reaction rates reveals that in these solids the H2 combustion, the selectivity limiting factor in the PrOx process, is mainly controlled by the support and not by the gold presence. The possible use of the hydrogen oxidation reaction as a catalyst selection criterion is discussed.

KW - CO removal

KW - Gold catalysts

KW - H oxidation

KW - PrOx

UR - https://www.scopus.com/pages/publications/84929155894

U2 - 10.1016/j.jcat.2015.03.015

DO - 10.1016/j.jcat.2015.03.015

M3 - Article

AN - SCOPUS:84929155894

SN - 0021-9517

VL - 326

SP - 161

EP - 171

JO - Journal of Catalysis

JF - Journal of Catalysis

ER -

H₂ oxidation as criterion for PrOx catalyst selection: Examples based on Au-CoO_x-supported systems

Abstract

Keywords

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