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Table of Contents
Integrated Gasification Combined Cycle (IGCC)
Introduction
Classification of gasifiers
IGCC process description
Performance without CO2 capture
Efficiency
Availability
Environmental performance
Key IGCC technology issues
Maturity
Performance with CO2 capture
Process description for IGCC with CO2 capture
Efficiency
Maturity
IGCC related research and improvement potential
Research and development areas
Improvement potential
Major IGCC Blocks and Components
Gasification
Classification of gasifiers
The Shell and GE gasifiers
Gas clean up
Chemical components of raw syngas
Syngas quenching
Syngas coolers
Particle removal
Shift
Sulfur removal
CO2 capture
Air separation
Gas turbines
NOx emissions from gas turbines
Gas turbines on syngas
Compressor surge limitation
Gas turbine torque limitation
Turbine inlet temperature and material lifetime
Gas turbines on hydrogen as only fuel
IGCC System Issues
Gasification and coal quality
Integration of the gas turbine and the air separation unit
What is meant by integration?
What are the benefits of integration?
Why may integration be problematic?
Maximizing power or efficiency?
Conclusions about maximum power or efficiency
References
Appendix
Lower vs. higher heating value
Energy penalties and efficiency penalty
Various losses and net electricity generated