Total oxidation of toluene over noble metal based Ce, Fe and Ni doped titanium oxides

T. Barakat, V. Idakiev, R. Cousin, G. S. Shao, Z. Y. Yuan, T. Tabakova, S. Siffert

Résultats de recherche: Contribution à un journal/une revueArticle

Résumé

The catalytic oxidation of toluene over macro-mesoporous titania loaded with noble metals (Au, Pd) and doped with three different metal oxides has been investigated. Doping of titania proved to offer a better reducibility for titania and greater activity towards toluene total oxidation, with a decrease of approximately 80°C in T50 values for 5wt% ceria (5CeTi) and iron (5FeTi) doped titania. After gold loading, 5CeTi supported material demonstrated the highest performance in the removal of toluene, with a total selectivity for CO2 and formation of traces of benzene. Since CeTi support (unloaded and noble metal loaded) proved to be the most effective material in the oxidation of toluene, an investigation of the effect of dopant content of this material has been conducted. Higher ceria content resulted in higher surface area values, higher noble metal-support interaction (observed in DR-UV-VIS results) and consequently a greater activity. Moreover, palladium loaded catalysts (T50 around 219°C) proved to be the best performing ones in terms of catalytic behaviour. Consequently, Pd5CeTi was tested for its durability under low toluene conversion rates in order to determine its stability and possible structural changes under these conditions. Doping and noble metal loading offered a stable activity of the catalysts in the conversion of toluene at low temperatures and for a long period of time, even though changes in TiO2 crystal sizes were detected. Carbonaceous compounds were formed onto the used catalyst and their quantity was investigated by DTA-TGA experiments.

langue originaleAnglais
Pages (de - à)138-146
Nombre de pages9
journalApplied Catalysis B: Environmental
Volume146
Les DOIs
étatPublié - mars 2014
Modification externeOui

Empreinte digitale

Titanium oxides
Toluene
Precious metals
toluene
titanium
oxide
oxidation
Oxidation
metal
Titanium
catalyst
Cerium compounds
Doping (additives)
Catalysts
Catalytic oxidation
palladium
Palladium
Benzene
durability
structural change

Citer ceci

@article{ec6502f99b344af9a0a53b6faaaf4377,
title = "Total oxidation of toluene over noble metal based Ce, Fe and Ni doped titanium oxides",
abstract = "The catalytic oxidation of toluene over macro-mesoporous titania loaded with noble metals (Au, Pd) and doped with three different metal oxides has been investigated. Doping of titania proved to offer a better reducibility for titania and greater activity towards toluene total oxidation, with a decrease of approximately 80°C in T50 values for 5wt{\%} ceria (5CeTi) and iron (5FeTi) doped titania. After gold loading, 5CeTi supported material demonstrated the highest performance in the removal of toluene, with a total selectivity for CO2 and formation of traces of benzene. Since CeTi support (unloaded and noble metal loaded) proved to be the most effective material in the oxidation of toluene, an investigation of the effect of dopant content of this material has been conducted. Higher ceria content resulted in higher surface area values, higher noble metal-support interaction (observed in DR-UV-VIS results) and consequently a greater activity. Moreover, palladium loaded catalysts (T50 around 219°C) proved to be the best performing ones in terms of catalytic behaviour. Consequently, Pd5CeTi was tested for its durability under low toluene conversion rates in order to determine its stability and possible structural changes under these conditions. Doping and noble metal loading offered a stable activity of the catalysts in the conversion of toluene at low temperatures and for a long period of time, even though changes in TiO2 crystal sizes were detected. Carbonaceous compounds were formed onto the used catalyst and their quantity was investigated by DTA-TGA experiments.",
keywords = "Ageing test, Doping, Gold, Macro-mesoporous titania, Palladium, VOC oxidation",
author = "T. Barakat and V. Idakiev and R. Cousin and Shao, {G. S.} and Yuan, {Z. Y.} and T. Tabakova and S. Siffert",
year = "2014",
month = "3",
doi = "10.1016/j.apcatb.2013.05.064",
language = "English",
volume = "146",
pages = "138--146",
journal = "Applied Catalysis B Environmental",
issn = "0926-3373",
publisher = "Elsevier",

}

Total oxidation of toluene over noble metal based Ce, Fe and Ni doped titanium oxides. / Barakat, T.; Idakiev, V.; Cousin, R.; Shao, G. S.; Yuan, Z. Y.; Tabakova, T.; Siffert, S.

Dans: Applied Catalysis B: Environmental, Vol 146, 03.2014, p. 138-146.

Résultats de recherche: Contribution à un journal/une revueArticle

TY - JOUR

T1 - Total oxidation of toluene over noble metal based Ce, Fe and Ni doped titanium oxides

AU - Barakat, T.

AU - Idakiev, V.

AU - Cousin, R.

AU - Shao, G. S.

AU - Yuan, Z. Y.

AU - Tabakova, T.

AU - Siffert, S.

PY - 2014/3

Y1 - 2014/3

N2 - The catalytic oxidation of toluene over macro-mesoporous titania loaded with noble metals (Au, Pd) and doped with three different metal oxides has been investigated. Doping of titania proved to offer a better reducibility for titania and greater activity towards toluene total oxidation, with a decrease of approximately 80°C in T50 values for 5wt% ceria (5CeTi) and iron (5FeTi) doped titania. After gold loading, 5CeTi supported material demonstrated the highest performance in the removal of toluene, with a total selectivity for CO2 and formation of traces of benzene. Since CeTi support (unloaded and noble metal loaded) proved to be the most effective material in the oxidation of toluene, an investigation of the effect of dopant content of this material has been conducted. Higher ceria content resulted in higher surface area values, higher noble metal-support interaction (observed in DR-UV-VIS results) and consequently a greater activity. Moreover, palladium loaded catalysts (T50 around 219°C) proved to be the best performing ones in terms of catalytic behaviour. Consequently, Pd5CeTi was tested for its durability under low toluene conversion rates in order to determine its stability and possible structural changes under these conditions. Doping and noble metal loading offered a stable activity of the catalysts in the conversion of toluene at low temperatures and for a long period of time, even though changes in TiO2 crystal sizes were detected. Carbonaceous compounds were formed onto the used catalyst and their quantity was investigated by DTA-TGA experiments.

AB - The catalytic oxidation of toluene over macro-mesoporous titania loaded with noble metals (Au, Pd) and doped with three different metal oxides has been investigated. Doping of titania proved to offer a better reducibility for titania and greater activity towards toluene total oxidation, with a decrease of approximately 80°C in T50 values for 5wt% ceria (5CeTi) and iron (5FeTi) doped titania. After gold loading, 5CeTi supported material demonstrated the highest performance in the removal of toluene, with a total selectivity for CO2 and formation of traces of benzene. Since CeTi support (unloaded and noble metal loaded) proved to be the most effective material in the oxidation of toluene, an investigation of the effect of dopant content of this material has been conducted. Higher ceria content resulted in higher surface area values, higher noble metal-support interaction (observed in DR-UV-VIS results) and consequently a greater activity. Moreover, palladium loaded catalysts (T50 around 219°C) proved to be the best performing ones in terms of catalytic behaviour. Consequently, Pd5CeTi was tested for its durability under low toluene conversion rates in order to determine its stability and possible structural changes under these conditions. Doping and noble metal loading offered a stable activity of the catalysts in the conversion of toluene at low temperatures and for a long period of time, even though changes in TiO2 crystal sizes were detected. Carbonaceous compounds were formed onto the used catalyst and their quantity was investigated by DTA-TGA experiments.

KW - Ageing test

KW - Doping

KW - Gold

KW - Macro-mesoporous titania

KW - Palladium

KW - VOC oxidation

UR - http://www.scopus.com/inward/record.url?scp=84885484343&partnerID=8YFLogxK

U2 - 10.1016/j.apcatb.2013.05.064

DO - 10.1016/j.apcatb.2013.05.064

M3 - Article

AN - SCOPUS:84885484343

VL - 146

SP - 138

EP - 146

JO - Applied Catalysis B Environmental

JF - Applied Catalysis B Environmental

SN - 0926-3373

ER -