Conceptual design, exergoeconomic analysis and multi-objective optimization for a novel integration of biomass-fueled power plant with MCFC-cryogenic CO2 separation unit for low-carbon power production

• Published in: Energy (Oxford) Vol. 227; p. 120511
• Main Authors: Akrami, Ehsan, Ameri, Mohammad, Rocco, Matteo V.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 15.07.2021; Elsevier BV
• Subjects: Biomass-based power plant; Carbon; Carbon dioxide; Carbon dioxide emissions; Carbon sequestration; Chemical reactions; CO2 capture and storage; Combustion; Combustion chambers; Conceptual design; Design optimization; Downdraft; Efficiency; Electric power generation; Electricity; Emissions control; Exergy; Gas turbines; Gasification; Industrial plant emissions; Integration; Internally fired-gas turbine; Molten carbonate fuel cell; Molten carbonate fuel cells; Multi-objective optimization; Multiple objective analysis; Municipal solid waste; Municipal waste management; Optimization; Power plants; Rankine cycle; Separation; Solid waste management; Thermodynamics; Internally fired-gas turbine; Biomass-based power plant; CO2 capture and storage; Multi-objective optimization; Conceptual design; Molten carbonate fuel cell
• ISSN: 0360-5442; 1873-6785
• DOI: 10.1016/j.energy.2021.120511

In the present study, the low-Carbon power production concept is proposed to introduce a novel integration. In the Bio-Energy Carbon Capture and Storage framework, Municipal Solid Waste is regarded as the main fuel for the system. To administer the analysis, a combination of a downdraft gasifier, a directly fired-gas turbine, Molten Carbonate Fuel Cell, Organic Rankine Cycle, and cryogenic CO2 separation unit is considered. The proposed integration is investigated from themodynamic, exergoeconomic, and environmental points of view. The multi-objective optimization is also conducted to minimize the CO2 emission and cost of electricity besides maximizing the overall exergy efficiency. By applying the optimum values for decision parameters, exergetic and economic results indicate that the combustion chamber and downdraft gasifier are identified as the component with maximum exergy destruction rate (17.44% and 14.59% of the total, respectively) due to high combustion and chemical reactions inefficiencies. Also, the net energy and exergy efficiency, cost of electricity, and specific CO2 emission result as 51.65%, 45.98%, 80.59 USD/MWh, and 101.20 kgCO2/kWh for the proposed system, respectively. The optimization results reveal that the CO2 emission was reduced by 33%. However, the exergy efficiency and cost of electricity will increase by 3% and 1.6%, respectively. •Integration of biomass-based power plant with CO2 capture technologies is proposed.•A 300 ton/day of MSW is proposed as a biomass source.•An organic Rankine cycle has been applied as Waste-to-Energy technology.•The cost of electricity (COE) is estimated at 80.59 USD/MWh.•The payback period of the proposed system is 6.3 years under the optimal condition.