Prediction of kinetic parameters of biomass pyrolysis based on the optimal mixture design method

• DOI: 10.1007/s10098-016-1137-8
• Publication Date: 2016-04-14T11:33:11Z
• Authors: Jin Zhang; Zhaoping Zhong; Bo Zhang; Zeyu Xue; Feihong Guo; Jia Wang
• Keywords: Thermogravimetric analysis; Hemicellulose; Atmospheric temperature range

Kinetic analysis is important for the study on the pyrolysis process of biomass. In this study, the contents of three components (cellulose, hemicellulose, and lignin) were firstly optimized according to the optional mixture design method. Then, the fast pyrolysis of three components and their mixtures were conducted in a thermogravimetric analyzer (TGA) to explore the pyrolysis characteristics of the mixtures and the synergistic relationship among the three components. Moreover, the prediction model of the kinetic parameters of the pyrolysis process was established and verified. The exploration results indicated that the interaction among the three components existed in the pyrolysis process, reflecting both the positive and negative synergistic relationships. The pyrolysis reaction of the mixtures of three components mainly occurred in the temperature range of 210–500 °C. In the temperature range of 210–390 °C, the average reaction order was 1.3 and the pyrolysis reaction required a high activation energy. In the temperature ranges of 390–500 °C, the average reaction order was 1.7 and the pyrolysis reaction required a relatively lower activation energy. The three components showed an interactive influence on kinetic parameters and the influence varied with the temperature range. The regression prediction model of the pyrolysis process of three components had a high accuracy and could predict the kinetic parameters of biomass pyrolysis effectively.