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Fast pyrolysis of cassava rhizome in the presence of catalysts

Authors
Journal
Journal of Analytical and Applied Pyrolysis
0165-2370
Publisher
Elsevier
Publication Date
Volume
81
Issue
1
Identifiers
DOI: 10.1016/j.jaap.2007.09.002
Keywords
  • Cassava Rhizome
  • Analytical Pyrolysis
  • Catalysts

Abstract

Abstract Cassava rhizome was catalytically pyrolysed at 500 °C using analytical pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) in order to investigate the effect of catalysts on bio-oil properties. The catalysts studied were zeolite ZSM-5, two aluminosilicate mesoporous materials Al-MCM-41 and Al-MSU-F, and a proprietary commercial catalyst alumina-stabilised ceria MI-575. The influence of catalysts on pyrolysis products was observed through the yields of aromatic hydrocarbons, phenols, lignin-derived compounds, carbonyls, methanol and acetic acid. Results showed that all the catalysts produced aromatic hydrocarbons and reduced oxygenated lignin derivatives, thus indicating an improvement of bio-oil heating value and viscosity. Among the catalysts, ZSM-5 was the most active to all the changes in pyrolysis products. In addition, all the catalysts with the exception of MI-575 enhanced the formation of acetic acid. This is clearly a disadvantage with respect to the level of pH in the liquid bio-fuel.

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