SCI和EI收录∣中国化工学会会刊

›› 2009, Vol. 17 ›› Issue (5): 860-868.

• PRODUCT ENGINEERING AND CHEMICAL TECHNOLOGY • Previous Articles     Next Articles

A New Study on Combustion Behavior of Pine Sawdust Characterized by the Weibull Distribution

Lo Kuo-Chao1, Wu Keng-Tung2, Chyang Chien-Song1, Ting Wei-The1   

  1. 1. Department of Chemical Engineering, Chung Yuan Christian University, Chung Li 32023, China;
    2. Department of Forestry, National Chung Hsing University, Taichung 40227, China
  • Received:2009-06-08 Revised:2009-08-28 Online:2009-10-28 Published:2009-10-28
  • Supported by:
    Supported by the Chung Yuan Christian University (CYCU-97-CR-CE)

A New Study on Combustion Behavior of Pine Sawdust Characterized by the Weibull Distribution

Lo Kuo-Chao1, Wu Keng-Tung2, Chyang Chien-Song1, Ting Wei-The1   

  1. 1. Department of Chemical Engineering, Chung Yuan Christian University, Chung Li 32023, China;
    2. Department of Forestry, National Chung Hsing University, Taichung 40227, China
  • 通讯作者: Chyang Chien-Song,E-mail:cschyang@gmail.com
  • 基金资助:
    Supported by the Chung Yuan Christian University (CYCU-97-CR-CE)

Abstract: An isothermal operation is implemented by employing a thermogravimetric analyzer (TGA) for simulating the thermal decomposition behavior of 58μm pine sawdust in air atmosphere.An independent parallel reaction model is adopted in this study to describe the thermal decomposition mechanism.The Weibull distribution function is used to record and analyze the weight loss during isothermal decomposition at different temperatures(500,600,700,and 800℃).The total weight loss of the pine sawdust is assumed as a linear combination of individual weight loss from three components,including the char and two volatile matters.The plot of the thermal decomposition rate curve leads to kinetic parameters such as the reaction rate constants and the reaction order.The results show that the Weibull distribution function successfully represents decomposition curves of three components,and fits the experimental data very well.Therefore,this study provides a simple way to evaluate the decomposition rate of biomass combustion in a real combustor.

Key words: biomass, combustion, Weibull distribution, parallel reaction model, reaction kinetics

摘要: An isothermal operation is implemented by employing a thermogravimetric analyzer (TGA) for simulating the thermal decomposition behavior of 58μm pine sawdust in air atmosphere.An independent parallel reaction model is adopted in this study to describe the thermal decomposition mechanism.The Weibull distribution function is used to record and analyze the weight loss during isothermal decomposition at different temperatures(500,600,700,and 800℃).The total weight loss of the pine sawdust is assumed as a linear combination of individual weight loss from three components,including the char and two volatile matters.The plot of the thermal decomposition rate curve leads to kinetic parameters such as the reaction rate constants and the reaction order.The results show that the Weibull distribution function successfully represents decomposition curves of three components,and fits the experimental data very well.Therefore,this study provides a simple way to evaluate the decomposition rate of biomass combustion in a real combustor.

关键词: biomass, combustion, Weibull distribution, parallel reaction model, reaction kinetics