Abstract
In order to estimate a suitable condition for the production of high calorie gas by the hydrogasification of coal, Taiheiyo coal was gasified continuously with hydrogen, and the yield of each product or the composition of gas produced was measured. The experiments were carried out under conditions of 714-775°C and 0-50 kg/cm2G. The feed rate of the coal ranged from 0.256 to 1.47 kg/hr and of hydrogen ranged from 0.113 to 1.059 m3/hr.
The volume of methane produced was in the range of 0.2 to 0.3 m3/kg-coal, and it depended strongly on the feeding ratio of coal to hydrogen. The other factors, such as the hydrogen pressure and the coal feed rate, did not affect obviously on the evolution of methan. The yield and the viscosity of tar decreased with the residence time of gas in a reactor. The coal conversion was ranged from 0.38-0.55 kg/kg-coal and it depended on the feeding ratio of coal to hydrogen. The total heat value of the residual char was in good linear relation to the coal conversion.
