期刊
BIORESOURCE TECHNOLOGY
卷 131, 期 -, 页码 40-46出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2012.12.136
关键词
Biomass; Kinetic analysis; The activation energy; Page model; TGA
资金
- National Basic Research Program of China [2013CB228103]
- National High Technology Research and Development Program of China [2012AA051803]
- National Natural Science Foundation of China [50930006]
An in-depth investigation was conducted on the kinetic analysis of raw biomass using thermogravimetric analysis (TGA), from which the activation energy distribution of the whole pyrolysis process was obtained. Two different stages, namely, drying stage (Stage I) and devolatilization stage (Stage II), were shown in the pyrolysis process in which the activation energy values changed with conversion. The activation energy at low conversions (below 0.15) in the drying stage ranged from 10 to 30 kJ/mol. Such energy was calculated using the nonisothermal Page model, known as the best model to describe the drying kinetics. Kinetic analysis was performed using the distributed activation energy model in a wide range of conversions (0.15-0.95) in the devolatilization stage. The activation energy first ranged from 178.23 to 245.58 kJ/mol and from 159.66 to 210.76 kJ/mol for corn straw and wheat straw, respectively, then increasing remarkably with an irregular trend. (C) 2012 Elsevier Ltd. All rights reserved.
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