Glycerol conversion into biofuel additives by acetalization with pentanal over heteropolyacids immobilized on zeolites

J. E. Castanheiro, J. Vital, I. M. Fonseca, A. M. Ramos

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Dodecamolydbophosphoric acid (HPMo) immobilized on USY zeolite was used as a catalyst for the acetalization of glycerol with pentanal at 70 °C. Catalysts were prepared with different amounts of heteropolyacid, and the most active sample was the HPMo2@Y catalyst (1.1 wt.%). The products of glycerol acetalization with pentanal were (2-butyl-1,3-dioxolan-4-yl)methanol, a five-member ring compound, and 2-butyl-1,3-dioxan-5-ol, a six-member ring compound. Good values of selectivity for the five-member ring compound (80–85%) were obtained with all materials. The reaction conditions were optimized using HPMo2@Y as a catalyst. The optimal conditions were determined to be 70 °C reaction temperature with 0.3 g catalyst and a 1:2.5 M ratio of glycerol to pentanal. The catalytic stability of HPMo2@Y was studied. The acetalization of glycerol with pentanal was performed using the same sample. High catalytic activity for HPMo2@Y was observed.

Original languageEnglish
JournalCatalysis Today
DOIs
Publication statusPublished - 1 Jan 2019

Keywords

  • Acetalization
  • Glycerol
  • Green processes
  • Heterogeneous catalysis
  • Heteropolyacids

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