Project Overview

Demonstration: First Step / Oxygen-blown IGCC

Coal is gasified in the gasifier to generate syngas with carbon monoxide (CO) and hydrogen (H2) being the main components. After this, the heat of the syngas is recovered in a syngas cooler and a gas clean-up unit removes impurities and sulfur from the syngas. Next, the syngas is combusted in the gas turbine combustor to drive the gas turbine. The combustion exhaust gas in the gas turbine is emitted from the stack after having its heat recovered by the heat recovery steam generator. Meanwhile, the steam turbine is driven by steam generated in the syngas cooler and the heat recovery steam generator.The combined cycle is then driven by this gas turbine and steam turbine. This makes it possible to achieve power generation efficiency beyond that of conventional pulverized coal-fired power generation.

Demonstration Facility / Schematic Flow

Demonstration Facility / Schematic Flow Figure

Demonstration Schedule

Demonstration Schedule

Achievement in the first step demonstration

Highly efficiency with high "adjustment capability“
Oxygen-blown IGCC can serve as both a base-load power supply
and an adjustment power supply

Complete All target items of demonstration test !!

<Primary results>
  • We obtained forecast achieving a net thermal efficiency of approximately 46% on a commercial plant, and could expect to cut CO2 emissions by approximately 15% compared to the current maximum efficiency pulverized coal power generation (USC).
  • We achieved a load change rate that significantly exceeds that of conventional pulverized coal power generation, and verified a high "adjustment capability" that can even support the sudden output fluctuations of renewable energy.
  • We confirmed stable plant operation using coal of different types, from sub-bituminous coal to bituminous coal.
Scale Up
Item Result Achievement
Plant efficiency
  • Net efficiency:40.8% (HHV)- the world top-class efficiency for 166MW class coal thermal power plant
(Gross efficiency:51.9% LHV)
Obtained forecast for achieving net thermal efficiency of approximately 46% (HHV)on a commercial unit
(Gross efficiency of approximetly 57% LHV)
Emission level
  • SOx:<8ppm
  • NOx:<5ppm
  • Particulate:<3mg/m3N(O2equivalent16%)
Achieved goals for strict emission gas regulations in Japan and achieved environmental performance equivalent to that of LNG thermal power
  • Endurance test:5,119hour
  • Continuous operation:2,168hour
Obtained forecast for annual utilization factor of 70% or higher required for a commercial unit
Coal variety
  • Verified with four kinds of coal
    (including bituminous coal and sub-bituminous coal)
Verified wide range of coal variety compatibility, being able to contribute to both energy security and economic efficiency
  • Load change rate:〜16%/min
  • Minimum load:0MW(NET)
  • Achieved load change rate equivalent to that of an LNG combined cycle and confirmed high "adjustment capability" that can balance out the unstable output of renewable energy
  • Confirmed capability of fulfilling the role as a spare power source can handle emergency requests for demand such as during a natural disaster
  • Obtained a prospect of equivalent generating cost with commercial PCF plant
Verified economic efficiency equivalent to that of conventional pulverized coal power generation and obtained forecast for the spread of oxygen-blown IGCC