The analysis of the underground coal gasification in experimental equipment

This paper describes an experiment of underground coal gasification in experimental equipment. The experiment was done within the range of the project APVV-0582-06, in May 2010. During the period of 63 h there was gasified amount of 214 kg of coal in experimental gasifier with average rate of 3.4 kg/h. The air, was the primary gasification agent in the experiment and its total volume was 661 Nm3. Oxygen was used only in a short period of the experiment. The produced gas reached an average calorific value of 3.27 MJ/Nm3. The calorific value was slightly higher (4.13 MJ/Nm3) when was using oxygen as gasification agent. This article talks not only about the analysis of the achieved results from UCG but also used experimental gasifier, input supply system of a gasification agent, and monitoring system.