Towards Stable Catalysts for Aqueous Phase Conversion of Ethylene Glycol for Renewable Hydrogen

Kamila Koichumanova; Anna Kaisa Kristiina Vikla; Dennis de Vlieger; Kulathuiyer Seshan; Barbara Mojet; Leonardus Lefferts

doi:10.1002/cssc.201300445

Towards Stable Catalysts for Aqueous Phase Conversion of Ethylene Glycol for Renewable Hydrogen

Kamila Koichumanova, Anna Kaisa Kristiina Vikla, Dennis de Vlieger, Kulathuiyer Seshan, Barbara Mojet, Leonardus Lefferts

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Abstract

Aqueous-phase reforming of ethylene glycol over alumina-supported Pt-based catalysts is reported. Performance of the catalysts is investigated by conducting kinetics and in situ attenuated total reflectance (ATR)-IR spectroscopic analysis. Pt/γ-Al2O3 is unstable under APR conditions (270 °C, 90 bar) and undergoes phase transformation to boehmite [AlO(OH)]. This conversion of alumina is studied in situ by using ATR-IR spectroscopy; transition into boehmite proceeds even at milder conditions (210 °C, 40 bar). Pt/γ-Al2O3 deactivates irreversibly because the Pt surface area decreases owing to an increasing metal particle size and coverage with boehmite. However, Pt supported on boehmite itself shows stable activity. Surprisingly, the rate of formation of hydrogen per Pt surface atom is significantly higher on boehmite compared to an alumina-supported catalyst. This observation seems correlated to both increased concentration of surface OH groups as well as to enhanced oxidation of Pt when comparing Pt/γ-Al2O3 with Pt/AlO(OH).

Original language	English
Pages (from-to)	1717-1723
Journal	ChemSusChem
Volume	6
Issue number	9
DOIs	https://doi.org/10.1002/cssc.201300445
Publication status	Published - 2013

Keywords

IR-87247
METIS-297557

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10.1002/cssc.201300445

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title = "Towards Stable Catalysts for Aqueous Phase Conversion of Ethylene Glycol for Renewable Hydrogen",

abstract = "Aqueous-phase reforming of ethylene glycol over alumina-supported Pt-based catalysts is reported. Performance of the catalysts is investigated by conducting kinetics and in situ attenuated total reflectance (ATR)-IR spectroscopic analysis. Pt/γ-Al2O3 is unstable under APR conditions (270 °C, 90 bar) and undergoes phase transformation to boehmite [AlO(OH)]. This conversion of alumina is studied in situ by using ATR-IR spectroscopy; transition into boehmite proceeds even at milder conditions (210 °C, 40 bar). Pt/γ-Al2O3 deactivates irreversibly because the Pt surface area decreases owing to an increasing metal particle size and coverage with boehmite. However, Pt supported on boehmite itself shows stable activity. Surprisingly, the rate of formation of hydrogen per Pt surface atom is significantly higher on boehmite compared to an alumina-supported catalyst. This observation seems correlated to both increased concentration of surface OH groups as well as to enhanced oxidation of Pt when comparing Pt/γ-Al2O3 with Pt/AlO(OH).",

keywords = "IR-87247, METIS-297557",

author = "Kamila Koichumanova and Vikla, {Anna Kaisa Kristiina} and {de Vlieger}, Dennis and Kulathuiyer Seshan and Barbara Mojet and Leonardus Lefferts",

year = "2013",

doi = "10.1002/cssc.201300445",

language = "English",

volume = "6",

pages = "1717--1723",

journal = "ChemSusChem",

issn = "1864-5631",

publisher = "Wiley-VCH Verlag",

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TY - JOUR

T1 - Towards Stable Catalysts for Aqueous Phase Conversion of Ethylene Glycol for Renewable Hydrogen

AU - Koichumanova, Kamila

AU - Vikla, Anna Kaisa Kristiina

AU - de Vlieger, Dennis

AU - Seshan, Kulathuiyer

AU - Mojet, Barbara

AU - Lefferts, Leonardus

PY - 2013

Y1 - 2013

N2 - Aqueous-phase reforming of ethylene glycol over alumina-supported Pt-based catalysts is reported. Performance of the catalysts is investigated by conducting kinetics and in situ attenuated total reflectance (ATR)-IR spectroscopic analysis. Pt/γ-Al2O3 is unstable under APR conditions (270 °C, 90 bar) and undergoes phase transformation to boehmite [AlO(OH)]. This conversion of alumina is studied in situ by using ATR-IR spectroscopy; transition into boehmite proceeds even at milder conditions (210 °C, 40 bar). Pt/γ-Al2O3 deactivates irreversibly because the Pt surface area decreases owing to an increasing metal particle size and coverage with boehmite. However, Pt supported on boehmite itself shows stable activity. Surprisingly, the rate of formation of hydrogen per Pt surface atom is significantly higher on boehmite compared to an alumina-supported catalyst. This observation seems correlated to both increased concentration of surface OH groups as well as to enhanced oxidation of Pt when comparing Pt/γ-Al2O3 with Pt/AlO(OH).

AB - Aqueous-phase reforming of ethylene glycol over alumina-supported Pt-based catalysts is reported. Performance of the catalysts is investigated by conducting kinetics and in situ attenuated total reflectance (ATR)-IR spectroscopic analysis. Pt/γ-Al2O3 is unstable under APR conditions (270 °C, 90 bar) and undergoes phase transformation to boehmite [AlO(OH)]. This conversion of alumina is studied in situ by using ATR-IR spectroscopy; transition into boehmite proceeds even at milder conditions (210 °C, 40 bar). Pt/γ-Al2O3 deactivates irreversibly because the Pt surface area decreases owing to an increasing metal particle size and coverage with boehmite. However, Pt supported on boehmite itself shows stable activity. Surprisingly, the rate of formation of hydrogen per Pt surface atom is significantly higher on boehmite compared to an alumina-supported catalyst. This observation seems correlated to both increased concentration of surface OH groups as well as to enhanced oxidation of Pt when comparing Pt/γ-Al2O3 with Pt/AlO(OH).

KW - IR-87247

KW - METIS-297557

U2 - 10.1002/cssc.201300445

DO - 10.1002/cssc.201300445

M3 - Article

SN - 1864-5631

VL - 6

SP - 1717

EP - 1723

JO - ChemSusChem

JF - ChemSusChem

IS - 9

ER -

Towards Stable Catalysts for Aqueous Phase Conversion of Ethylene Glycol for Renewable Hydrogen

Abstract

Keywords

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