Zirconium phosphate supported tungsten oxide solid acid catalysts for the esterification of palmitic acid

Katabathini N. Rao; Adapa Sridhar; Adam F. Lee; Stewart J. Tavener; Nigel A. Young; Karen Wilson

doi:10.1039/b606088a

Zirconium phosphate supported tungsten oxide solid acid catalysts for the esterification of palmitic acid

Katabathini N. Rao, Adapa Sridhar, Adam F. Lee, Stewart J. Tavener, Nigel A. Young, Karen Wilson

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125 Citations (Scopus)

Abstract

A series of zirconium phosphate supported WO_x solid acid catalysts with W loadings from 1–25 wt% have been prepared on high surface area zirconium phosphate by a surface grafting method. Catalysts were characterized by N₂ adsorption, FTIR, Raman, UV-Vis, 31P MAS NMR, pyridine TPD and X-ray methods. Spectroscopic measurements suggest a Keggin-type structure forms on the surface of zirconium phosphate as a ([triple bond, length as m-dash]ZrOH₂⁺)(ZrPW₁₁O₄₀⁵⁻) species. All catalysts show high activity in palmitic acid esterification with methanol. These materials can be readily separated from the reaction system for re-use, and are resistant to leaching of the active heteropolyacid, suggesting potential industrial applications in biodiesel synthesis.

Original language	English
Pages (from-to)	790-797
Number of pages	8
Journal	Green Chemistry
Volume	8
Issue number	9
Early online date	28 Jun 2006
DOIs	https://doi.org/10.1039/b606088a
Publication status	Published - 2006

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title = "Zirconium phosphate supported tungsten oxide solid acid catalysts for the esterification of palmitic acid",

abstract = "A series of zirconium phosphate supported WOx solid acid catalysts with W loadings from 1–25 wt% have been prepared on high surface area zirconium phosphate by a surface grafting method. Catalysts were characterized by N2 adsorption, FTIR, Raman, UV-Vis, 31P MAS NMR, pyridine TPD and X-ray methods. Spectroscopic measurements suggest a Keggin-type structure forms on the surface of zirconium phosphate as a ([triple bond, length as m-dash]ZrOH2+)(ZrPW11O405−) species. All catalysts show high activity in palmitic acid esterification with methanol. These materials can be readily separated from the reaction system for re-use, and are resistant to leaching of the active heteropolyacid, suggesting potential industrial applications in biodiesel synthesis.",

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T1 - Zirconium phosphate supported tungsten oxide solid acid catalysts for the esterification of palmitic acid

AU - Rao, Katabathini N.

AU - Sridhar, Adapa

AU - Lee, Adam F.

AU - Tavener, Stewart J.

AU - Young, Nigel A.

AU - Wilson, Karen

PY - 2006

Y1 - 2006

N2 - A series of zirconium phosphate supported WOx solid acid catalysts with W loadings from 1–25 wt% have been prepared on high surface area zirconium phosphate by a surface grafting method. Catalysts were characterized by N2 adsorption, FTIR, Raman, UV-Vis, 31P MAS NMR, pyridine TPD and X-ray methods. Spectroscopic measurements suggest a Keggin-type structure forms on the surface of zirconium phosphate as a ([triple bond, length as m-dash]ZrOH2+)(ZrPW11O405−) species. All catalysts show high activity in palmitic acid esterification with methanol. These materials can be readily separated from the reaction system for re-use, and are resistant to leaching of the active heteropolyacid, suggesting potential industrial applications in biodiesel synthesis.

AB - A series of zirconium phosphate supported WOx solid acid catalysts with W loadings from 1–25 wt% have been prepared on high surface area zirconium phosphate by a surface grafting method. Catalysts were characterized by N2 adsorption, FTIR, Raman, UV-Vis, 31P MAS NMR, pyridine TPD and X-ray methods. Spectroscopic measurements suggest a Keggin-type structure forms on the surface of zirconium phosphate as a ([triple bond, length as m-dash]ZrOH2+)(ZrPW11O405−) species. All catalysts show high activity in palmitic acid esterification with methanol. These materials can be readily separated from the reaction system for re-use, and are resistant to leaching of the active heteropolyacid, suggesting potential industrial applications in biodiesel synthesis.

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JO - Green Chemistry

JF - Green Chemistry

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Zirconium phosphate supported tungsten oxide solid acid catalysts for the esterification of palmitic acid

Abstract

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