Energetic Recovery of Straw Cereal Waste Through the Pyrolysis Process in the Microwave Field

In this study, the microwave pyrolysis process was used to carbonize wheat and oat straws for energy use. The charring effect was studied by varying the microwave power level (160–800 W) and biomass moisture content (6-60%). During the pyrolysis process, the time and temperature level were monitored until the wheat and oat straws reached the charcoal stage. By looking at the power it was possible to see that the processing time is inversely proportional, when the power level is low, the processing time increases. When it comes to the temperature level, when we have a higher power the temperature of the straws increases in a relatively shorter time than when we have a lower power and a longer time for the temperature of the straws to rise. During the pyrolysis process to reach the carbonization of wheat and oat straw, it was found that the temperature of the straw must reach over 200°C. The charcoal resulting from the microwave pyrolysis of the two investigated biomasses is intended to be used in the production of thermal energy.