Mesoporous phosphated and sulphated silica as solid acid catalysts for glycerol acetylation

Khadijeh Beigom Ghoreishi, Nilofar Asim, Mohd. Ambar Yarmo, Mohd Wahid Samsudin

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Sulphate- and phosphate-loaded silicas were synthesised using the sol-gel method with different sulphate and phosphate loadings. These catalysts were characterised using Fourier transform infrared spectroscopy (FT-IR), the Brunauer-Emmett-Teller (BET) method and X-ray photoelectron spectroscopy (XPS). Acidity was measured using the temperature-programmed desorption of ammonia (TPD-NH3) method. The results showed that glycerol esterification with acetic acid conversion decreased as follows: α(H2SO4) (100 %) > α(H3PO4) (99 %) > α(silica loaded with 20 % sulphuric acid) (SS-20; 98 %) > α(silica loaded with 20 % phosphoric acid) (PS-20; 83 %). These studies suggest that the solid acid catalytic activity in the esterification of glycerol is highly dependent on catalyst acidity strength, pore size and surface area.

Original languageEnglish
Pages (from-to)1194-1204
Number of pages11
JournalChemical Papers
Volume68
Issue number9
DOIs
Publication statusPublished - 2014

Fingerprint

Acetylation
Glycerol
Silicon Dioxide
Esterification
Silica
Temperature programmed desorption
Acidity
Catalysts
Sulfates
Acids
Phosphates
Photoelectron Spectroscopy
Phosphoric acid
Polymethyl Methacrylate
Fourier Transform Infrared Spectroscopy
Ammonia
Acetic acid
Acetic Acid
Sol-gel process
Pore size

Keywords

  • acetylation
  • glycerol
  • mesoporous
  • phosphated silica
  • sol-gel
  • sulphated silica

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Biochemistry
  • Industrial and Manufacturing Engineering
  • Materials Chemistry

Cite this

Mesoporous phosphated and sulphated silica as solid acid catalysts for glycerol acetylation. / Ghoreishi, Khadijeh Beigom; Asim, Nilofar; Yarmo, Mohd. Ambar; Samsudin, Mohd Wahid.

In: Chemical Papers, Vol. 68, No. 9, 2014, p. 1194-1204.

Research output: Contribution to journalArticle

Ghoreishi, Khadijeh Beigom ; Asim, Nilofar ; Yarmo, Mohd. Ambar ; Samsudin, Mohd Wahid. / Mesoporous phosphated and sulphated silica as solid acid catalysts for glycerol acetylation. In: Chemical Papers. 2014 ; Vol. 68, No. 9. pp. 1194-1204.
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AU - Samsudin, Mohd Wahid

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