Article (Scientific journals)
Sol-gel Ni/γ-Al2O3 material as secondary catalyst for toluene reforming: Tailoring the γ-Al2O3 substrate with stearic acid
Claude, Vincent; Mahy, Julien; Mischeli, Francesca et al.
2020In Microporous and Mesoporous Materials, 291, p. 109681
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Keywords :
Ni-doped Al2O3 catalyst; toluene reforming; sol-gel process; mesoporous structure
Abstract :
[en] In this work, Ni-based catalysts supported on alumina were studied for toluene reforming with a particular attention on the substrate texture. Indeed, the influence of stearic acid addition during the synthesis process of Ni/Al2O3 catalysts was study on the material texture and catalytic activity. All the samples were also characterized thanks to nitrogen adsorption-desorption isotherm measurements, mercury porosimetry and X-ray diffraction. It was shown that the step of addition of the surfactant during the synthesis process and the composition of the solvent medium (water/ethanol vs. pure ethanol) strongly modified the texture of the samples. Indeed, the sample prepared with addition of stearic acid before the precipitation step and inside a pure ethanol medium showed the highest increase of micro- and mesoporosity. The modification of the textural properties also proved to influence the size of the Ni particles, and thus the reducibility of the catalysts. The sample which showed the most interesting textural properties was tested for the reforming of 24.000 ppmv of toluene at 650 °C. Results showed that the conversion of toluene strongly increased when the samples were tailored but these changes also increased the catalyst sensitivity to carbon contamination.
Disciplines :
Chemical engineering
Materials science & engineering
Author, co-author :
Claude, Vincent 
Mahy, Julien  ;  Université de Liège - ULiège > Department of Chemical Engineering > Nanomaterials, Catalysis, Electrochemistry
Mischeli, Francesca
Geens, Jérémy ;  Université de Liège - ULiège > Department of Chemical Engineering > Department of Chemical Engineering
Lambert, Stéphanie  ;  Université de Liège - ULiège > Department of Chemical Engineering > Nanomaterials, Catalysis, Electrochemistry
Language :
English
Title :
Sol-gel Ni/γ-Al2O3 material as secondary catalyst for toluene reforming: Tailoring the γ-Al2O3 substrate with stearic acid
Publication date :
January 2020
Journal title :
Microporous and Mesoporous Materials
ISSN :
1387-1811
eISSN :
1873-3093
Publisher :
Elsevier, Amsterdam, Netherlands
Volume :
291
Pages :
109681
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 30 August 2019

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