Prediction of the Slagging and Fouling of Indonesian Coal with Hard Wood from Central and East Java

Indonesia as an agricultural country has abundant biomass potential, especially wood waste in Java. The prospect of co-firing is considered ideal to overcome the problem of coal use in boilers. This is also in line with supporting the Indonesian government program in increasing the use of renewable energy. Samples of coal co-firing with wood waste from Central Java and East Java were selected for this study. Furthermore, blending between coal and wood biomass from Central and East Java with a composition ratio of (25%:75%) and (50%:50%). Furthermore, it is predicted based on the risk tendency of slagging and fouling. The risk of slagging, fouling, abrasion, and corrosion with theoretical index. In general, increasing the composition of coal blending with hardwood increases the tendency of slagging and fouling. However, blending coal with hardwood from Central Java at a mixture of (25%:75%) can be recommended because it has a low risk of slagging and fouling.