Designing And Optimizing Study On MCFC Hybrid Power System With CO₂ Capture

With the rising of global warming and sea level elevating issues, people have paid more and more attentions to the greenhouse gas emissions, as the CO2 is the main greenhouse gas, the CO2 reduction has become extremely urgent. Currently, using renewable energy to replace fossil fuels, improving the efficiency of power system and developing CO2 capture and recycling technology with lower energy assumptions are the most effective ways for energy conservation and emission reduction. However, with the development of the society, higher demands are needed for environmental protections, therefore more efforts have to be taken to explore new methods for energy using which are efficient, clean, economical and safe. This paper introduced the molten carbonate fuel cell (MCFC) hybrid systems with CO2 capture and studied how to maintain the system’s high efficiency when greatly reducing its CO2 emissions.The first section mainly introduced the research background and status of MCFC as well as the development of Aspen plus software, then focused on the introduction of MCFC operating principle, finally established and validated the MCFC ontology model using the Aspen plus. In addition, this section also described the innovative technology of oxygen ion transfer membrane (ITM), which could be used in this paper to produce oxygen with lower energy consumptions.The second section designed the ITM-integrated atmospheric MCFC hybrid system with CO2 capture and studied the effects of different ITM sweep gas on the system performance in order to find the MCFC hybrid system with the highest efficiency. The results showed that the proposed new systems have obvious advantages.The third section designed the pressurized MCFC hybrid system with CO2 capture and discussed the optimal key parameters. At the same time, this section also conducted a preliminary economic analysis for the new system.The research results of this paper will provide valuable references for the study of efficient, clean and energy-saving MCFC hybrid systems.