Zr-containing hybrid organic-inorganic mesoporous materials: hydrophobic acid catalysts for biodiesel production

Rebeca Sánchez-Vázquez, Cyril Pirez, Jose Iglesias, Karen Wilson, Adam F. Lee, Juan A. Melero

Research output: Contribution to journalSpecial issue

Abstract

Zirconium-containing periodic mesoporous organosilicas (Zr-PMOs) with varying framework organic content have been synthesized through a direct synthesis method. These materials display the excellent textural properties of the analogous inorganic solid acid Zr-SBA-15 material. However, the substitution of silica by organosilicon species provides a strong hydrophobic character. This substitution leads to meaningful differences in the environment surrounding the zirconium metal sites, leading the modification of the catalytic properties of these materials. Although lower metal incorporation is accomplished in the final materials, leading to a lower population of metal sites, hydrophobisation leads to an impressive beneficial effect on the intrinsic catalytic activity of the zirconium sites in biodiesel production by esterification/transesterification of free fatty acid -containing feedstock. Moreover, the catalytic activity of the highly hybridised materials is hardly affected in presence of large amounts of water, confirming their very good water-tolerance. This makes Zr-PMO materials interesting catalysts for biodiesel production from highly acidic water-containing feedstock.
Original languageEnglish
Pages (from-to)994-1001
Number of pages8
JournalChemCatChem
Volume5
Issue number4
Early online date21 Jan 2013
DOIs
Publication statusPublished - Apr 2013

Fingerprint

Mesoporous materials
inorganic materials
Biofuels
Biodiesel
catalysts
acids
Catalysts
Acids
catalytic activity
Zirconium
metals
substitutes
water
Metals
fatty acids
Feedstocks
Water
Catalyst activity
Substitution reactions
silicon dioxide

Keywords

  • biodiesel
  • heterogeneous catalysis
  • mesoporous materials
  • supported catalysts
  • zirconium

Cite this

Sánchez-Vázquez, R., Pirez, C., Iglesias, J., Wilson, K., Lee, A. F., & Melero, J. A. (2013). Zr-containing hybrid organic-inorganic mesoporous materials: hydrophobic acid catalysts for biodiesel production. ChemCatChem, 5(4), 994-1001. https://doi.org/10.1002/cctc.201200527
Sánchez-Vázquez, Rebeca ; Pirez, Cyril ; Iglesias, Jose ; Wilson, Karen ; Lee, Adam F. ; Melero, Juan A. / Zr-containing hybrid organic-inorganic mesoporous materials : hydrophobic acid catalysts for biodiesel production. In: ChemCatChem. 2013 ; Vol. 5, No. 4. pp. 994-1001.
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Sánchez-Vázquez, R, Pirez, C, Iglesias, J, Wilson, K, Lee, AF & Melero, JA 2013, 'Zr-containing hybrid organic-inorganic mesoporous materials: hydrophobic acid catalysts for biodiesel production', ChemCatChem, vol. 5, no. 4, pp. 994-1001. https://doi.org/10.1002/cctc.201200527

Zr-containing hybrid organic-inorganic mesoporous materials : hydrophobic acid catalysts for biodiesel production. / Sánchez-Vázquez, Rebeca; Pirez, Cyril; Iglesias, Jose; Wilson, Karen; Lee, Adam F.; Melero, Juan A.

In: ChemCatChem, Vol. 5, No. 4, 04.2013, p. 994-1001.

Research output: Contribution to journalSpecial issue

TY - JOUR

T1 - Zr-containing hybrid organic-inorganic mesoporous materials

T2 - hydrophobic acid catalysts for biodiesel production

AU - Sánchez-Vázquez, Rebeca

AU - Pirez, Cyril

AU - Iglesias, Jose

AU - Wilson, Karen

AU - Lee, Adam F.

AU - Melero, Juan A.

PY - 2013/4

Y1 - 2013/4

N2 - Zirconium-containing periodic mesoporous organosilicas (Zr-PMOs) with varying framework organic content have been synthesized through a direct synthesis method. These materials display the excellent textural properties of the analogous inorganic solid acid Zr-SBA-15 material. However, the substitution of silica by organosilicon species provides a strong hydrophobic character. This substitution leads to meaningful differences in the environment surrounding the zirconium metal sites, leading the modification of the catalytic properties of these materials. Although lower metal incorporation is accomplished in the final materials, leading to a lower population of metal sites, hydrophobisation leads to an impressive beneficial effect on the intrinsic catalytic activity of the zirconium sites in biodiesel production by esterification/transesterification of free fatty acid -containing feedstock. Moreover, the catalytic activity of the highly hybridised materials is hardly affected in presence of large amounts of water, confirming their very good water-tolerance. This makes Zr-PMO materials interesting catalysts for biodiesel production from highly acidic water-containing feedstock.

AB - Zirconium-containing periodic mesoporous organosilicas (Zr-PMOs) with varying framework organic content have been synthesized through a direct synthesis method. These materials display the excellent textural properties of the analogous inorganic solid acid Zr-SBA-15 material. However, the substitution of silica by organosilicon species provides a strong hydrophobic character. This substitution leads to meaningful differences in the environment surrounding the zirconium metal sites, leading the modification of the catalytic properties of these materials. Although lower metal incorporation is accomplished in the final materials, leading to a lower population of metal sites, hydrophobisation leads to an impressive beneficial effect on the intrinsic catalytic activity of the zirconium sites in biodiesel production by esterification/transesterification of free fatty acid -containing feedstock. Moreover, the catalytic activity of the highly hybridised materials is hardly affected in presence of large amounts of water, confirming their very good water-tolerance. This makes Zr-PMO materials interesting catalysts for biodiesel production from highly acidic water-containing feedstock.

KW - biodiesel

KW - heterogeneous catalysis

KW - mesoporous materials

KW - supported catalysts

KW - zirconium

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