Journal
FUEL
Volume 95, Issue 1, Pages 146-151Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2011.08.032
Keywords
Bio-oil; Upgrading; Hydrolysis; Levoglucosan; Amberlyst-70
Categories
Funding
- Australian Government
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Acid-catalysed esterification converts organic acids in bio-oil into useful esters. However, the conditions to carry out esterification also promote the hydrolysis of anhydro-sugars in bio-oil. This paper reports the hydrolysis and glycosidation of sugars during the esterification of bio-oil using Amberlyst-70 solid acid catalyst at 70-170 degrees C. The bio-oil was prepared from the fast pyrolysis of mallee biomass in a fluidised-bed reactor. Our results show that sugar oligomers and levoglucosan in bio-oil can be hydrolysed to form D-glucose, which further reacts with methanol to form methyl-alpha-D-glucopyranoside, concurrently with the esterification of acids (e.g. formic, acetic and propionic acids) in bio-oil. The effects of other important parameters such as catalyst loading and methanol to bio-oil ratio on the hydrolysis-glycosidation of sugar compounds present in bio-oil are also reported. (C) 2011 Elsevier Ltd. All rights reserved.
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