The temperature is one of the most important gasification parameter influencing the product gas composition in the gasification process. A higher temperature will result in higher conversion efficiency and thereby increase the product gas yield and in a decrease in tar content (Kumar, 2009; Narvaez, 1996). The contents of H2, CO, CO2 and CH4 are affected due to a simultaneous interplay of the reactions (6.3) to (6.6), when the temperature is increased. At temperatures above 750-800°C, the H2 and the CH4 content will increase and decrease, respectively, as a result of the endothermic nature of the H2 production reactions (6.4), the water gas reaction and (6.5), the steam reforming as well as a reverse of the exothermic water gas shift reaction (6.6). If the temperature is further increased to temperatures above 850-900°C, also the reverse Boudouard reaction (6.3) plays a substantial role together with the reactions (6.4) and (6.5).