| 光谱学与光谱分析 |
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| Analysis of Pyrolysis Process and Gas Evolution Rule of Larch Wood by TG-FTIR |
| REN Xue-yong1, DU Hong-shuang1,2, WANG Wen-liang1, GOU Jin-sheng1, CHANG Jian-min1* |
1. College of Material Science and Technology, Beijing Forestry University, Beijing 100083, China
2. Provincial Key Lab of Wooden Material Science and Engineering, Forestry College of Beihua University, Jilin 132013, China |
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Abstract The weight-loss character and gas evolution rule of larch wood at different heating rates were investigated by TG-FTIR (thermogravimetric analyzer coupled to a Fourier transform infrared spectrometer), and the results were compared with those of larch wood model-component mixture. The main weight-loss area of larch wood was wider than larch wood model-component mixture, and the residual char yield of larch wood (18.97%) was lower than larch wood model-component mixture (29.83%). During the pyrolysis process, the activation energy of larch wood model-component mixture was higher than the larch wood’s in the low-temperature region, but there was little difference between the two segments in high temperature region. Larch wood came through several stages of water extraction, main component decomposition, charring during its pyrolysis process, and gas precipitation mainly happening at near 375 ℃. The order of main gas products generated from the larch wood pyrolysis reaction was CO2>H2O>CH4>CO, and the gas product yield was significantly increased when the heating rate increased. The larch wood model-component mixture had the similar basic rules of producing gas to larch wood, but the former had relatively higher precipitation density than the latter.
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Received: 2011-09-27
Accepted: 2011-12-12
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Corresponding Authors:
CHANG Jian-min
E-mail: cjianmin@bjfu.edu.cn
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