Project Overview

Demonstration: Second Step / Oxygen-blown IGCC with CO₂ Capture

Overview of Oxygen-blown IGCC with CO₂ Capture

Part of the syngas after gas clean up is sent to the added CO₂ capture unit. The shift reactor converts the carbon monoxide （CO） in the syngas with steam （H₂O）into carbon dioxide （CO₂） and hydrogen （H₂）. After that, only the CO₂ is captured in the CO₂ absorber. The syngas after the CO₂ capture becomes fuel gas rich in hydrogen （H₂） and is then sent to the gas turbine.

Demonstration Facility / Schematic Flow

Low Temperature Operating Sour Shift Catalyst Demonstration

We are conducting a demonstration of a sour shift catalyst that causes the syngas before desulfurization to shift react at a low temperature in order to reduce the amount of steam added in the shift reaction and capture the CO₂ with even higher efficiency. We will then verify the long-term reliability of the catalyst through long-term operation.

Demonstration Facility Overview

Demonstration scale	17% of syngas
CO shift system	Sweet shift（Gas extracted after desulfurization）
CO₂ capture	Physical absorption

Demonstration Schedule (Include CO₂ capture and liquefaction process)

Demonstration Targets

Item	Target/Indicator
Basic performance (Power generation efficiency)	To obtain a forecast of net power generation efficiency of approximately 40% (HHV) while capturing 90% of the CO₂ in the newly-built commercial IGCC plant (1,500°C class IGCC)
Basic performance （CO₂ capture rate and purity）	CO₂ capture rate^*1 : 90% or more CO₂ purity: 99% or more
Plant Operability and reliability	To establish the operational method of IGCC with CO₂ capture and to verify the reliability
Economy	To evaluate the cost per amount of recovered CO₂ in a commercial IGCC plant using cost target data shown in the Technology Roadmap^*2 as a benchmark.

*1. CO₂ capture efficiency (rate of CO₂ capture with the standalone capture device): (Amount of C in the captured CO₂ gas / Amount of C in the gas introduced in the CO₂ capture system) × 100
*2. This is the technology roadmap pertaining to next-generation thermal power generation formulated in a conference (established by the Ministry of Economy, Trade and Industry in June 2015) toward the early realization of next-generation thermal power generation.