Pengaruh Pembakaran Campuran (Co-Firing) Bahan Bakar Batubara dan Cangkang Kelapa Sawit terhadap Terbentuknya Deposit Fouling

Abstract

Energy needs in Indonesia are dominated by the use of fossil fuels, the energy of which cannot be renewed and the formation process takes millions of years. The decreasing fossil energy reserves on earth, especially in Indonesia, have caused researchers to compete to find energy that is environmentally friendly and easily renewable. Co-firing, also known as co-combustion, is a method of burning two different types of fuel in one similar combustion device. This research aims to analyze the characteristics of combustion temperature, fuel properties, and the potential for fouling that occurs in the co-combustion process. The raw materials used in this research were coal and palm oil shells. This research was carried out using a laboratory scale boiler, with two combustion processes using 100 kg of total fuel with a ratio of 60% coal and 40% palm oil shells. From variations in excess air of 20% and 25%, the fouling potential was found to be 4.43, classified as high potential, with the highest combustion temperature of 788.6℃ in test 1 at 300 minutes, and 855.5℃ in test 2 at 300 minutes. From fuel tests it was also found that coal had a carbon value of 61.35% and palm kernel shells 52.29%. The volatile matter value of coal is 11.57% and palm oil shells 8.88%. The HHV value for coal is 7564.80 Kcal/kg and the LHV is 6790.42 Kcal/kg, while for palm oil shells the HHV value is 7334.37 Kcal/Kg and the LHV value is 6559.99 Kcal/kg.