Journal
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
Volume 80, Issue 1, Pages 1-5Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jaap.2006.12.012
Keywords
biomass; pyrolysis; cellulose; starch; levoglucosan
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Novel design of pyrolyzer was developed for efficient collection of primary degradation products from biomass. The apparatus consists of a pair of horizontal belt conveyers facing to each other, in a reduced-pressure chamber with pressures ranging from 600 Pa to 8 kPa. The lower belt feeds the powder of raw material to the pyrolysis region heated up to 450 degrees C; the upper belt facing the heated part is cooled from the top to condense the evaporated products with minimal secondary degradation. A continuous-feed pyrolyzer for the production of organic liquids from cellulosic biomass has been demonstrated at a laboratory-scale of 5-10 g/h of dry feed in temperature of 410-450 degrees C. Treatment of cellulose and starch gave high yields of 1,6-anhydro-P-D-glucopyranoside (levoglucosan). The yield depended on the heater temperature and the residual air pressure in the chamber. The maximum yield of levoglucosan from microcrystalline cellulose (Avicel) was approx. 70% (analytical value) under residual air of 5 kPa. (c) 2006 Elsevier B.V. All rights reserved.
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