
In efforts to address global warming, it is critical to introduce new sources energy like wind and solar power, in addition to nuclear and LNG-fired power generation. Equally important, especially for resource poor Japan, is introducing thermal power generation technologies that tap into coal, known for its abundant reserves and stable prices—thereby creating a menu of optimal energy sources and ultimately securing a stable energy supply.
This goal requires a healthy balance between ensuring reliable energy sources and addressing global warming issues, something that can be achieved through development of high-efficiency coal fired power generation technologies. Here, IGCC is expected to play a core role.
Additionally, the IGCC is expected to facilitate not just the use of coal inside Japan, but help reduce greenhouse gases significantly through dramatic improvements in efficiency for coal fired thermal power generation. The IGCC is also expected to enhance environmental performance in power generation to the same degree outside Japan.

An IGCC system is designed to achieve higher efficiency than conventional coal-fired power generation systems through the gasification of coal coupled with a combined cycle (CC) process.
System configuration:Boiler + Steam turbine
Coal is burned in the boiler. The expansive force of the resulting steam is used to drive the steam turbine, thereby driving the generator directly connected to it.

System configuration:Boiler + Steam turbine + Gas turbine
Fuel is burned in compressed air to generate combustion gas. The expansive force of the gas is used to drive the gas turbine, thus operating the generator directly connected to it. The high-temperature exhaust gas is supplied to the boiler to generate the steam needed to drive the steam turbine.

System configuration:Boiler + Steam turbine + Gas turbine + Gasifier
Coal is gasified in the gasifier to produce(syn-gas). The syn-gas is led to the gas turbine for burning to drive the gas turbine. The high-temperature exhaust gas is supplied to the boiler to generate the steam needed to drive the steam turbine.
