Characteristics of Pyrolysis Products of Bori Lignite Briquette

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 degrees 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 degrees C. The semi-coke SEM changed from honeycomb-like structure to softening surface and collapsed cracks with the pyrolysis temperature rising from 400 degrees C to 800 degrees C. The volatile has released entirely above 800 degrees C, while the tar yield reached the highest of 3.39% in 550 degrees C Furthermore, the volume of CH4, C-2 similar to C-4 and H-2 reached maximum at 750 degrees C, 600 degrees C and 800 degrees C, with their values being 0.80 L/min, 0.12 L/min and 2.79 L/min respectively. (C) 2011 Published by Elsevier B.V Selection and/or peer-review under responsibility of International Materials Science Society.