Overview of the Osaki CoolGen Project
This project consists of three steps. In the first step, we’ve achieved the targets of this stage obtaining sufficient performance of an oxygen-blown integrated coal gasification combined cycle(oxygen-blown IGCC) which is a core technology of the integrated coal gasification fuel cell combined cycle(IGFC) that can be the ultimate high-efficiency technology generating electricity with Gas turbine, Steam turbine, and Fuel cells. In the second step, we are conducting the demonstration of oxygen-blown IGCC with CO2 capture. In the third step, we will add fuel cells to the IGCC system in order to enhance the efficiency in IGFC with CO2 capture.
We have been implementing it 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.
Project Overview Figure
- Demonstration: First Step / Oxygen-blown IGCC
- Demonstration: Second Step / Oxygen-blown IGCC with CO2 Capture
- Demonstration: Third Step / IGFC with CO2 Capture
Osaki CoolGen Project Demonstration Facilities Layout
Overall Picture of the Demonstration Plant
The oxygen-blown integrated coal gasification combined cycle （oxygen-blown IGCC）demonstration 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 has been added to the oxygen-blown IGCC facility to conduct a demonstration with the aim at verifying the high-efficiency oxygen-blown IGCC with CO2 capture.
In the third step, we will add Fuel cells to the oxygen-blown IGCC with CO2 capture and carry out demonstration tests for the first IGFC with CO2 capture in the world,aiming to achieve an even more efficient power generation system.
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. Oxygen is used to gasify coal while nitrogen is used to carry the pulverised 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 steam are converted into carbon dioxide (CO2) and hydrogen (H2). Then the CO2 in the shifted gas is absorbed in the absorber.
7Fuel Cell unit
（Solid Oxide Fuel Cell（SOFC））
Fuel for generation is Hydrogen-rich gas after CO2 capture