INETIC ANALYSIS OF CORNSTALK PYROLYSIS
Pyrolysis of comstalk was studied by STA449c thermogravimetric apparatus with heating rate of 5、 10、 15、 20、30K/min and final temperature 1273K. The pyrolysis process of cornstalk included three steps: losing water and pre-pyrolysis, main pyrolysis and carbonization. As the heating rate increased, the maximum pyrolysis rate increased greatly, the characteristic temperature became higher and the DSC curves sloped down. When heating rate was too fast, dehydration process lagged. The mass fraction of charcoal remained reduced at 1273K when the heating rate was too slow. The activation energy, calculated by both integral method and differential method, was 161±23kJ/mol. With Malek method, it can be determined that pyrolysis process of cornstalk accorded with the J-M-A equation, which indicated that pyrolysis mechanism of cornstalk is random nucleation and later growth. Then experiment data was simulated with MATLAB software, and the mechanism was confirmed, the kinetic parameters of cornstalk pyrolysis were determined.
cornstalk pyrolysis kinetic parameters pyrolysis mechanism
Ming-feng Wang En-chen Jiang
College of Engineering,South China Agricultural University,Guangzhou 510642,China
国际会议
广州
英文
1226-1231
2008-12-03（万方平台首次上网日期，不代表论文的发表时间）