ANALYSIS OF THE EFFECT OF CO-FIRING SAWDUST ON COAL BURNING CHARACTERISTICS IN PULVERIZED COAL BURNER

• Main Author: Ahmad, Ghulam
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/82893
• Institution: Institut Teknologi Bandung

Coal is the most widely used fossil fuel in the world with a contribution of 37% to world electricity production. However, the impact of burning coal can increase greenhouse gas emissions, especially CO2. In 2022, Indonesia's total CO2 emissions is 700 million tons, with the largest contributor to emissions being power plants. Biomass is a renewable energy source that can be implemented for electricity production because it has the potential to reduce CO2, SO2 and NOx emissions. Implementation of biomass such as sawdust or sawdust in power plants can be done using co-firing method, which is combining or mixing coal fuel and sawdust biomass in existing coal plants. By modeling the combustion of coal and sawdust through the co-firing method using ANSYS Fluent software, the effect of using a mixture of coal and sawdust on temperature distribution, flame length, and pollutant emissions resulting from combustion can be obtained. Simulation results show that as the sawdust co-firing ratio increases to 15%, the maximum combustion temperature decreases by 2.8% from 1947 K to 1893 K, the same thing also happens to the temperature distribution in the burner. The length of the burning flame increased as the sawdust co-firing ratio increased up to 22% at a co-firing ratio of 15%. In addition, CO2, SO2, and NOx pollutant emissions decreased as the co-firing ratio increased with a reduction percentage of up to 13.47%, 8.5%, and 6.9% respectively at a 15% co-firing ratio.