Abstract
We are imported over 90% primary energy resources from foreign countries in Japan. To keep the future electric power stable supply and to reduce the carbon dioxide emission, the development of the carbon dioxide reduction technology from the electric power generation systems is our urgent issue. The authors studied the technologies to capture the carbon dioxide from the exhaust gas and storage, and got the conclusion that it was theoretically possible, practically and economically unfeasible. To reduce the carbon dioxide, first it is necessary to improve the new power generating system's efficiency developing the more high-temperature gas turbine combined-cycle and coal gasification combined-cycle power generation systems. Secondly it is necessary to promote the carbon neutral biomass resources' use substituted for fossil resources. The BDF such as bio-ethane, fat acid ester etc. is combusted in the existing oil fired and natural gas fired power generation plats, and woody biomass and solid waste will be co-fired at the existing coal fired power generating plants. In near future, the construction of new power generating plants based on biomass co-firing technology will be necessary. In this paper the authors proposed two scenarios to achieve the carbon dioxide emission reduction from that of 1990 in 2050.
