Reactive distillation of glycerol in the presence of different porous type catalysts

Szilvia Mészáros, János Halász, Imre Kiricsi

Research output: Chapter in Book/Report/Conference proceedingChapter

2 Citations (Scopus)

Abstract

Pure and modified layered double hydroxides (LDH), modified ZSM5 zeolites, and new type of Raney Ni (RNi) catalysts were tested in reactive distillation of glycerol (byproduct of biodiesel production). The favorable reaction is dehydration followed by hydrogenation. The dehydration basically occurred via ionic pathway, but some catalyst can initiate radical processes, resulting higher conversion, but lower selectivity. If Ni is in ionic form, the formation of radical products, such as acetaldehyde (ZSM5) and allyl alcohol (LDH) is characteristic. With increasing metallic character, RNi promote also the formation of acetol. The Cu- and Cr inhibit the radical processes, resulting in formation mainly acetol (HT) and acrolein (ZSM5). 1,2-propanediol formation was detected just in the reaction over pure HT and Mg-Al mixed oxides, albeit with low yield. On the other hand the selective (∼90%) production of acetol was obtained in the presence of Cu and Cr containing HT. The XRD patterns and BET measurements of the catalysts indicated irreversible changes in their structures during the reactive distillation.

Original languageEnglish
Title of host publicationZeolites and related materials
Subtitle of host publicationTrends, targets and challenges
Pages1191-1194
Number of pages4
EditionB
DOIs
Publication statusPublished - Nov 6 2008

Publication series

NameStudies in Surface Science and Catalysis
NumberB
Volume174
ISSN (Print)0167-2991

Keywords

  • Raney-Ni
  • glycerol
  • hydrotalcite
  • reactive distillation
  • zeolite

ASJC Scopus subject areas

  • Catalysis
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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  • Cite this

    Mészáros, S., Halász, J., & Kiricsi, I. (2008). Reactive distillation of glycerol in the presence of different porous type catalysts. In Zeolites and related materials: Trends, targets and challenges (B ed., pp. 1191-1194). (Studies in Surface Science and Catalysis; Vol. 174, No. B). https://doi.org/10.1016/S0167-2991(08)80100-0