关键词:
生物质, 成型燃料, 热解, 动力学

Abstract: Stalk is a very important biomass resource in China. Pyrolysis is one of the most effective measures to transform biomass energy into clean energy with high quality. This paper studied on pyrolysis characteristics and dynamics laws of rice straw and wood chippellets by thermogravimetric analysis method. The paper also analyzed the experimental results under different heating rates condition with the high pure Ar as protecting gas. The results showed that rice straw briquette fuel pyrolytic process was divided into 3 phases namely preheating stage, fast pyrolysis stage and slow pyrolysis stage. Pyrolysis maximum rate increased with the rising of pyrolysis heating rate, which was beneficial for pyrolysis, but it caused incomplete reaction, so the temperature rise rate should not be too high. By comparing the performance of the 2 kinds of pellets, sawdust pellets stability was better than that of rice straw briquette fuel. Through calculating kinetic parameters of the rice straw pellets, activation energy and pre-exponential factor  increased with the rising of heating rate, and linear fitting coefficients were all above 0.99, showing that the main reaction stage are in line with the first order reaction model.

Key words: biomass, hriquettes fuel, pyrolysis, dynamics