Thermal degradations of used cotton fabrics and of cellulose: kinetic and heat transfer modeling

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• 作者：Alain Brillard ; David Habermacher ; Jean-François Brilhac
• 关键词：Cotton pyrolysis ; Cellulose pyrolysis ; Thermogravimetric analysis ; Temperature ramp ; Kinetic modeling ; Heat transfer model
• 刊名：Cellulose
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：24
• 期：3
• 页码：1579-1595
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Bioorganic Chemistry; Physical Chemistry; Organic Chemistry; Polymer Sciences;
• 出版者：Springer Netherlands
• ISSN：1572-882X
• 卷排序：24

文摘

The thermal degradations of small samples of different used cotton fabrics and of cellulose, in comparison, in a thermogravimetric balance are considered under non-oxidative (100% N\(_{2}\)) or oxidative (20% O\(_{2}\), 80% N\(_{2}\)) atmospheres and for different temperature ramps (5–50 K min\(^{-1}\)). The associated kinetic parameters are determined for low temperature ramps using a differential isoconversional method or an Extended Independent Parallel Reaction model, with different reaction functions, and they are compared. Because these values of the kinetic parameters do not simulate in an appropriate way the thermal degradations of the materials at higher temperature ramps, a heat transfer model is proposed, which brings corrections to the temperature really acting inside the samples. With these corrections, the experimental and simulated mass loss rate curves do better superimpose, which leads to values of the kinetic parameters which are independent of the temperature ramp.