کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5201653 1502903 2014 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermal decomposition kinetics of balsa wood: Kinetics and degradation mechanisms comparison between dry and moisturized materials
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Thermal decomposition kinetics of balsa wood: Kinetics and degradation mechanisms comparison between dry and moisturized materials
چکیده انگلیسی

Thermogravimetric analyses under air atmosphere were performed up to 973 K on balsa wood to investigate the thermal degradation process of two types of samples aged differently: a dry balsa specimen and a hygroscopically aged material. The Kissinger method was used to determinate the kinetic parameters as the activation energy Ea, the pre-exponential factor k0 and the order of reaction n. The three constituents of balsa (i.e. hemicellulose, cellulose and lignin) were well identified and the decomposition temperature region well characterized. The presence of a large quantity of water affects the thermal decomposition behavior of wood inducing notably a maximal degradation temperature higher by 314 K in relation to the dry material. The determined experimental kinetic parameters Ea, k0 and n are in good agreement with those find in the literature for woods. The role of diffused water in the different thermal behavior between dry and aged balsa is explained from physical and chemical points of view.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Degradation and Stability - Volume 110, December 2014, Pages 208-215
نویسندگان
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