Studies on the Dehydration of Glycerol Over Niobium Catalysts

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Abstract:

The dehydration of glycerol over nanosize niobium catalysts was conducted in a stainless steel autoclave reactor. The catalysts were prepared by the calcination of niobium oxalate between 200 and 700 °C. Catalysts were characterized by N2 Physisorption, XRD and TPD of ammonia to investigate the effect of the calcination temperature and water on catalytic performance, catalysts' structures and acidity. Acrolein was mainly produced about 51–71% with useful by-products such as acetaldehyde and methanol. Amorphous Nb2O5 catalysts calcined at 200–400 °C significantly showed higher conversion of glycerol than the crystallized Nb2O5 catalyst calcined at 500–700 °C. Also the conversion of glycerol and selectivity of acrolein was increased with increasing the acidity of catalyst, which can be controlled by calcination temperature.

Keywords: ACROLEIN; DEHYDRATION; GLYCEROL; NIOBIUM OXIDE (NB2O5)

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2011.4797

Publication date: August 1, 2011

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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