(313e) Energy Performance of an Integrated Biomass Gasification and SOFC Combined Cycle Power Plants with CO2 Capture

Torrefied biomass is a potential alternative fuel to replace raw biomass or coal in power plants. This study develops a hybrid power plant by integrating torrefied biomass co-gasification (TBCG) with solid oxide fuel cell (SOFC) systems. The calcium looping (CaL) CO₂ capture process is also implemented into the hybrid power system. Two configurations for the proposed hybrid power plant are designed and compared each other, namely, pre-SOFC and post-SOFC. Thermodynamic analysis is adopted to examine the performance of hybrid power generation system using Aspen Plus. Three different scenarios of the energy efficiency indexes are taken into account to evaluate the performance of hybrid power plant. The simulation results show that the maximum net system efficiency of pre-SOFC and post-SOFC are 40.73 and 36.56%, respectively. In order to improve the maximum net system efficiency of hybrid power generation system, the heat recovery approach is performed. Through the heat integration design, the maximum net system efficiency of pre-SOFC and post-SOFC are 45.72 % and 44.63 %, respectively. Overall, pre-SOFC is superior to post-SOFC in terms of energy efficiency. However, post-SOFC can pursue the hybrid power plant with zero CO₂ emissions.