Because of the raising prices of crude oil and the environmentalism it is important to determine alternative energy source. This work is engaged with the possible alternative combustible wheat straw. The task was to combine wheat straw with blast furnace slag and molasses and to analyze their pyrolysis characteristics. The studies have been done with a thermo gravimetric analysis construction and then a DSC. In the meanwhile a personal computer mapped the mass losses and the rise of temperature to get the reaction heat flow. With these data and a MATLAB - program it was possible to create the mass loss-, heat flow- and the value curves. Because of the differences between the courses I could give information about the pyrolysis characteristics of every assay. To close the energy balance it was important to determine the useful heats, the ash content and the moisture of each example. I got the useful heat with the aid of a bomb calorimeter. Also the ash content and the moisture have been established. The combination with blast furnace slag causes a drop of whole nascent energy quantity. However could been noticed at the specific heat value curve during the pyrolysis a rising of the heat value maximum because of blast furnace slag. This indicates to a better tar cracking. Also by the use of molasses there was a rising. Further on because of these expertises wheat straw pellets with und without additives can be used into a pellets furnance.