Beschreibung:
This paper mainly studies the pyrolysis of micron-sized wood chips, and analyzes the effects of different conditions on the pyrolysis result. The results show that the pyrolysis process of wood chips is mainly divided into three stages: drying stage (<269.2°C), rapid pyrolysis stage (269.2~388.7°C), and carbonization stage (>388.7°C). For micron-sized materials, the change of particle size has little effect on the pyrolysis rate and activation energy. The humidity of the pyrolysis materials has no obvious rule for the effect on the pyrolysis result, but the accuracy of measurement can be improved by reducing the water content of pyrolysis materials, and pyrolysis materials with higher humidity have lower activation energy. The higher heating rate reduces the weight loss rate, but the overall pyrolysis rate will increase. The pyrolysis with a heating rate of 45K/min can reach a peak pyrolysis rate of 25.41%/min at 372°C. The activation energy shows a trend of first decreasing and then increasing. The higher the final pyrolysis temperature is, the higher the peak value of pyrolysis rate will be. In this experiment, the maximum pyrolysis rate corresponding to the final pyrolysis temperature of 800°C is 22.79%/min. The increase of the final pyrolysis temperature improves the integrity of the pyrolysis process, and it is also conducive to the pyrolysis reaction because of the reduction of activation energy. The influence of different pyrolysis atmosphere on the overall trend of pyrolysis mainly occurs after rapid degradation