Steam reforming of toluene as model of tar compound over Mo catalysts derived from hydrotalcites

Gheorghiţa Mitran, Daniel G. Mieritz, Dong Seo

Research output: Contribution to journalArticle

Abstract

This study evaluated the catalytic activity of Mo catalysts derived from hydrotalcite-like compounds for steam reforming of toluene as a model compound for tar. The catalysts with 1.5, 3 and 4.5 Mo loadings (wt%), denoted as Mo 1.5 MgAl, Mo 3 MgAl and Mo 4.5 MgAl respectively, were prepared by coprecipitation and characterized by BET, XRD, SEM, TEM, FT-IR and UV–VIS. The results showed that toluene conversion increased with increasing molybdenum content. The hydrogen amount depended on two factors: the presence of molybdate species on the surface and the presence of aluminum cations in tetrahedral sites (Mo 3 MgAl), with molybdenum influence being more pronounced. The H 2 /CO ratio decreased at increasing temperature while, the H 2 /CO 2 ratio increased proportionally with temperature. Mo 1.5 MgAl catalyst was more selective for CO 2 and H 2 , while, Mo 3 MgAl and Mo 4.5 MgAl were more selective for CO and H 2 .

Original languageEnglish (US)
JournalJournal of Saudi Chemical Society
DOIs
StatePublished - Jan 1 2019

Fingerprint

hydrotalcite
Tars
Steam reforming
Toluene
Carbon Monoxide
Catalysts
Molybdenum
Coprecipitation
Aluminum
Cations
Hydrogen
Catalyst activity
Transmission electron microscopy
Temperature
Scanning electron microscopy

Keywords

  • Hydrogen production
  • Molybdenum hydrotalcite
  • Steam reforming
  • Toluene

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Steam reforming of toluene as model of tar compound over Mo catalysts derived from hydrotalcites. / Mitran, Gheorghiţa; Mieritz, Daniel G.; Seo, Dong.

In: Journal of Saudi Chemical Society, 01.01.2019.

Research output: Contribution to journalArticle

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abstract = "This study evaluated the catalytic activity of Mo catalysts derived from hydrotalcite-like compounds for steam reforming of toluene as a model compound for tar. The catalysts with 1.5, 3 and 4.5 Mo loadings (wt{\%}), denoted as Mo 1.5 MgAl, Mo 3 MgAl and Mo 4.5 MgAl respectively, were prepared by coprecipitation and characterized by BET, XRD, SEM, TEM, FT-IR and UV–VIS. The results showed that toluene conversion increased with increasing molybdenum content. The hydrogen amount depended on two factors: the presence of molybdate species on the surface and the presence of aluminum cations in tetrahedral sites (Mo 3 MgAl), with molybdenum influence being more pronounced. The H 2 /CO ratio decreased at increasing temperature while, the H 2 /CO 2 ratio increased proportionally with temperature. Mo 1.5 MgAl catalyst was more selective for CO 2 and H 2 , while, Mo 3 MgAl and Mo 4.5 MgAl were more selective for CO and H 2 .",
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N2 - This study evaluated the catalytic activity of Mo catalysts derived from hydrotalcite-like compounds for steam reforming of toluene as a model compound for tar. The catalysts with 1.5, 3 and 4.5 Mo loadings (wt%), denoted as Mo 1.5 MgAl, Mo 3 MgAl and Mo 4.5 MgAl respectively, were prepared by coprecipitation and characterized by BET, XRD, SEM, TEM, FT-IR and UV–VIS. The results showed that toluene conversion increased with increasing molybdenum content. The hydrogen amount depended on two factors: the presence of molybdate species on the surface and the presence of aluminum cations in tetrahedral sites (Mo 3 MgAl), with molybdenum influence being more pronounced. The H 2 /CO ratio decreased at increasing temperature while, the H 2 /CO 2 ratio increased proportionally with temperature. Mo 1.5 MgAl catalyst was more selective for CO 2 and H 2 , while, Mo 3 MgAl and Mo 4.5 MgAl were more selective for CO and H 2 .

AB - This study evaluated the catalytic activity of Mo catalysts derived from hydrotalcite-like compounds for steam reforming of toluene as a model compound for tar. The catalysts with 1.5, 3 and 4.5 Mo loadings (wt%), denoted as Mo 1.5 MgAl, Mo 3 MgAl and Mo 4.5 MgAl respectively, were prepared by coprecipitation and characterized by BET, XRD, SEM, TEM, FT-IR and UV–VIS. The results showed that toluene conversion increased with increasing molybdenum content. The hydrogen amount depended on two factors: the presence of molybdate species on the surface and the presence of aluminum cations in tetrahedral sites (Mo 3 MgAl), with molybdenum influence being more pronounced. The H 2 /CO ratio decreased at increasing temperature while, the H 2 /CO 2 ratio increased proportionally with temperature. Mo 1.5 MgAl catalyst was more selective for CO 2 and H 2 , while, Mo 3 MgAl and Mo 4.5 MgAl were more selective for CO and H 2 .

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