Abstract
In order to make clear the effect of pressure on pyrolysis of coal, formation rates of gaseous products were measured using an anthracite as a sample under various pressures of 1-50atm, changing both the superficial velocity of inert gas and the height of coal bed. The sample was heated up to 900°C at a constant heating rate of 3.3°C/min.
No significant pressure effects on gaseous products were observed, while both the coal bed height and the superficial velocity of inert gas greatly influenced the rate of secondary methane formation above 600°C. It was found that the rate of secondary methane formation is proportional, both to the coal bed height and the reciprocal of superficial velocity.
