Journal
FUEL PROCESSING TECHNOLOGY
Volume 184, Issue -, Pages 45-56Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.fuproc.2018.11.008
Keywords
Vanadium oxides; Nanotubes; Glycerol; Acetalization; Biofuels
Funding
- CNPq [470793/2013-9]
- FUNCAP [23038.008860/2013-92]
- CAPES
- Ministerio de Economia y Competitividad, Spain [CTQ2015-68951-C3-3-R]
- FEDER funds
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The biodiesel production has led to a drastic surplus of glycerol and catalytic conversion of glycerol into value-added products is of great industrial importance. Thus, the acetalization of glycerol with ketone or aldehydes allows the glycerol transformation into bio-additive fuels. In this work, metals-containing vanadium oxides nanotubes (MeVOx NT in which, Me = Co, Pt or Ni) have been synthesized with additional internal porosity and tested in the acetalization of glycerol with acetone (AG) for valuable biofuels production. The catalysts showed remarkable performances in the AG reaction. Furthermore, by variation of the composition, catalyst loading and temperature and using distinct substrates (butyraldehyde, furfuraldehyde and benzaldehyde), NiVOxNT is active, being very selective to solketal and reciclable for 4 times in the AG reaction. On the contrary, pure VOx NT easily deactivated due to the structure agent removal during the reaction, which promote the collapse of the tubular structure. The CoVOxNT and PtVOxNT catalysts did not exhibit such a stable structure and easily deactivated in the reaction due to leaching of the metals oxides during the AG.
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