Abstract:
In order to understand the pyrolysis characteristics of 3 main afforestation tree species of
Alnus nepalensis,
Pinus armandii and
P.yunnanensis in central Yunnan, the 3 kinds of bark were subjected to thermogravimetric test at 10 ℃/min, 20 ℃/min and 30 ℃/min. The kinetic parameters were calculated and the kinetic equation was established. The analysis showed that the order of weight loss rate was
A.nepalensis >
P.armandii >
P.yunnanensis when the pyrolysis temperature in a range of 25-800 ℃. The TG curves of the 3 barks were very similar, followed the same pyrolysis mechanism. The combustion process of the 3 kinds of bark can be described by first-order kinetics equation and activation energy order from small to large was
P.armandii,
P.yunnanensis and
A.nepalensis. It indicated that
A.nepalensis bark has good fireproof performance and poor in
P.armandii bark.