期刊
CARBOHYDRATE POLYMERS
卷 98, 期 1, 页码 514-521出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2013.06.031
关键词
Cellulose; TG-MS; Pyrolysis; Oxidation; Kinetic model
资金
- National Basic Research Program of China (973 Program) [2012CB215306, 2010CB732206]
- National Natural Science Foundation of China [51106030]
- Jiangsu University Natural Science Basic Research Program [12KJB480005]
Cellulose degradation under inert (He) and oxidative atmospheres (7% O-2, 20% O-2 and 60% O-2) was investigated through thermogravimetric (TG) equipped with mass spectroscopy (MS) system. Two mass loss stages were observed for cellulose degraded under oxidative atmosphere, where the first mass loss stage is close to that under inert atmosphere, and the second one designated to char oxidation was enhanced by the increased oxygen concentration. The evolution of prominent volatiles including furfural, acetone, 2/5-hydromethyl furfural, formaldehyde, CO and CO2 was examined considering the influence of oxygen concentration. The plateau for mass loss and evolution of some volatiles leads to the difficulty to determine the division-point for the two stages. However, the fitting parameter (Dev%) around 5% confirms the applicability of the proposed two-stage kinetic model accounting for partial pressure of oxygen. Crown Copyright (C) 2013 Published by Elsevier Ltd. All rights reserved.
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