Co-firing of Wood Waste Biopellet with Coal in Coal-Fired Power Plants (CFPP): Evaluating Combustion Efficiency and Carbon Emission Reductions to Support the Sustainable Development Goals (SDGs)
Keywords:
Aspen Plus simulation, biopellet, co-firing, coal, emission reductionAbstract
Coal-fired power plants (CFPP) remain the dominant source of electricity generation in Indonesia, but they contribute significantly to greenhouse gas emissions. This study investigates the potential of co-firing wood waste biopellets as a partial substitute for coal to enhance combustion efficiency and reduce emissions. Thermochemical simulations were conducted using Aspen Plus v14 at a fixed fuel flow rate of 100 kg/h and 20% excess air, with biopellet ratios ranging from 0% to 25% by mass. Results show a decline in flue gas temperature (FGT) from 840°C to 645°C and a reduction in mass fractions of CO₂ (from 0.5908 to 0.5086), CO (from 0.0089 to 0.0051), NOₓ (from 0.0447 to 0.0256), and SO₂ (from 0.0013 to 0.0009). Meanwhile, H₂O and O₂ mass fractions increased to 0.1928 and 0.2671, respectively. Combustion efficiency improved significantly, from 84.7% to 90.9%. These findings indicate that co-firing biopellets not only lowers pollutant emissions but also enhances thermal performance. This approach offers a promising strategy for reducing the carbon footprint of coal-based power generation and contributes to the achievement of Sustainable Development Goals (SDG) 7 and 13.
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