Characteristics of Pyrolysis Products of Bori Lignite Briquette

摘要

In this paper pyrolysis experiment of the binderless hot-briquetted lignite were studied and the production characteristics of semi-coke tar and gas were analyzed. The results indicated: Along with the increase of pyrolysis temperature, the H/C of the semi-coke and the O element content reduced obviously, but both falling strength and compressive strength of the semi-coke were increased. When the pyrolysis temperature reached 650°C, the O element has completely released, and the falling and compressive strength reached 60.88% and 157.24N when the pyrolysis temperature reaches 700 °C .The semi-coke SEM changed from honeycomb-like structure to softening surface and collapsed cracks with the pyrolysis temperature rising from 400°C to 800°C. The volatile has released entirely above 800°C, while the tar yield reached the highest of 3.39% in 550°C. Furthermore, the volume of CH4, C2~C4 and H2 reached maximum at 750°C, 600°C and 800°C, with their values being 0.80L/min, 0.12 L/min and 2.79 L/min respectively.