Abstract:
This research aims, to study the effect of minerals on thermal decomposition of biomass. Weight loss and rate of weight loss versus temperature from pyrolysis process by using the TGA were used to investigate thermal decomposition. Rice husk, cellulose, hemicellulose and lignin were used as biomass samples. The minerals in biomass mainly consist of potassium and calcium respectively. Potassium carbonate and Calcium carbonate were employed to represent minerals in biomass in this study. Potassium carbonate had a significant effect on increasing of char yield in case of cellulose and lignin decomposition, and on decreasing decomposition temperature of cellulose about 80100 Kelvin. Addition of potassium carbonate and calcium carbonate to mixture had effect on the interaction between cellulose and lignin and cellulose and hemicellulose. When potassium carbonate and calcium carbonate were added to deminerized rice husk, char yield was droped and the value is closed to that from the raw rice husk. From these reasons, it can be concluded that these minerals had a significant effect on of behavior biomass pyrolysis.