Journal
BIOMASS & BIOENERGY
Volume 71, Issue -, Pages 285-293Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.biombioe.2014.09.029
Keywords
Xylose; Vanadyl pyrophosphate; Capillary fluidized bed; Maleic anhydride; Acrylic acid
Funding
- Natural Sciences and Engineering Research Council of Canada (NSERC)
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Xylose is the second most abundant sugar after glucose. Despite its tremendous potential to serve as a renewable feedstock, few commercial processes exploit this resource. Here, we report a new technology in which a two-fluid nozzle atomizes a xylose-water solution into a capillary fluidized bed operating above 300 degrees C. Xylose-water droplets form at the tip of the injector, vaporize then react with a heterogeneous mixed oxide catalyst. A syringe pump metered the solution to the reactor charged with 1 g of catalyst. Product yield over vanadyl pyrophosphate was higher compared to molybdenum trioxide-cobalt oxide and iron molybdate; it reached 25% for maleic anhydride, 17% for acrylic acid and 11% for acrolein. Gas residence time was 0.2 s. The catalyst was free of coke even after operating for 4 h - based on a thermogravimetric analysis of catalyst withdrawn from the reactor. Below 300 degrees C, powder agglomerated at the tip of the injector at 300 degrees C; it also agglomerated with a xylose mass fraction of 7% in water. (C) 2014 Elsevier Ltd. All rights reserved.
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