2-03　CO₂回収型クローズドIGCC技術開発

諸検討結果に基づく送電端効率のアップデート

抄録

CCS is regarded as a method to reduce CO₂ emission. Huge energy is required to capture CO₂ from exhaust gas of thermal power station, thermal efficiency decreases and cost of electricity increases. The oxy-fuel IGCC system is under development to solve this problem, by Central Research Institute of Electric Power Industry (CRIEPI), Mitsubishi Heavy Industries Co. ltd. and Mitsubishi Hitachi Power Systems Co. ltd. as NEDO (New Energy and Industrial Technology Development Organization) funded project. This system is composed of O₂/CO₂ blown gasifier and semi-closed cycle gas turbine, and the system is expected to keep high efficiency more than 42% at HHV after CO₂ capture. CRIEPI runs several experimental researches and numerical simulations. This report is to update net efficiency estimation data depending on results acquired by 3-Dimensioanl numerical simulation on coal gasifier including gasification and combustion reaction and particle behavior, and to estimate impact of CO₂ purification on efficiency.