Overview of the OSAKI CoolGen Project
This project consists of three steps. In the first step, we will conduct a large facility demonstration of an oxygen-blown integrated coal gasification combined cycle (oxygen-blown IGCC)*1 that is a fundamental technology of the ultimate high-efficiency power generation technology of the integrated coal gasification fuel cell combined cycle (IGFC)*2.
In the second step, we plan to conduct a demonstration of oxygen-blown IGCC with CO2 capture by adding a CO2 capture facility to the oxygen-blown IGCC. In the third step, we plan to further add a fuel cell in order to conduct a demonstration of IGFC with CO2 capture.
We have been implementing this as a project assisted by the Ministry of Economy, Trade and Industry (METI) since FY2012 and as a project assisted by the New Energy and Industrial Technology Development Organization (NEDO) since FY2016.
*1. IGCC: Integrated Coal Gasification Combined Cycle
*2. IGFC: Integrated Coal Gasification Fuel Cell Combined Cycle
Project Overview Figure
- Demonstration: First Step / Oxygen-blown IGCC
- Demonstration: Second Step / Oxygen-blown IGCC with CO2 Capture
*The third step, demonstration of IGFC with CO2 separation and capture, indicates our plan at the current stage.
IGCC Demonstration Test Power Station Layout
Overall Picture of the Oxygen-blown Integrated Coal Gasification Combined Cycle Demonstration Power Plant
The oxygen-blown integrated coal gasification combined cycle (oxygen-blown IGCC) demonstration power plant is comprised of a coal gasification unit, gas clean-up unit, combined cycle unit, air separation unit and wastewater treatment unit. In the second step of this project, a CO2 capture unit will be added to the oxygen-blown IGCC facility to conduct a demonstration with the aim of verifying the high-efficiency oxygen-blown IGCC with CO2 capture technology.
1Coal gasification unit
In this facility, pulverized coal is gasified with oxygen to generate syngas with carbon monoxide (CO) and hydrogen (H2) being the main components of this.
2Gas clean-up unit
This facility removes sulfur and impurities in the syngas to create clean gas fuel to supply to the gas turbine.
3Combined cycle unit
This facility is composed of gas turbine power generation using syngas as a fuel and steam turbine power generation that extract energy from the steam generated by the recovered exhaust heat. The output is 166,000 kW.
4Air separation unit
This facility compresses/liquefies air and then uses the difference between the boiling points to separate it into oxygen and nitrogen. The oxygen is used to gasify the coal while the nitrogen is used to transport the coal.
5Wastewater treatment unit
This facility removes environmental pollutants from the plant wastewater used in the gas clean-up so that it meets the stringent emission standards of the Seto Inland Sea.
6CO2 capture unit
This facility promotes a water gas shift reaction in which carbon monoxide (CO) and water vapor are converted to carbon dioxide (CO2) and hydrogen (H2). Then the CO2 in the shifted gas is absorbed in the absorber.