This Coal gasification has been investigated for several decades. Recently, coal gasification combined cycle power plants have been identified as attractive alternatives for Since wide variations occur generating electricity’. among coals, knowledge of the effect of coal type on gasification is important for future gasification applications. Previous investigations of coal type have dealt mainly with demonstration of particular processes, and have not attempted to determine basic coal type effects. Coal properties were also found to influence gas composition, especially those properties which affect reaction temperature (coal HHV, volatile matter content, and moisture content). Higher temperature resulted in higher H, and CO concentrations. Higher feed H/C ratio (including H in coal moisture) correlated with higher H, concentration, suggesting that some of the coal moisture reacted to form hydrogen.