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

José Eduardo F. Castanheiro, Joaquim Vital, Isabel Maria Fonseca, Ana Maria Ramos

Research output: Contribution to journalConference articlepeer-review

7 Citations (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
Pages (from-to)76-80
JournalCatalysis Today
Volume346
Issue numberSI
DOIs
Publication statusPublished - 15 Apr 2020
Event6th International Congress on Green Process Engineering (GPE) - Toulouse, France
Duration: 3 Jun 20186 Jun 2018

Keywords

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

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