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Japan 250 MW Coal Based IGCC Demo Plant Set for 2007 Start-Up

by Harry Jaeger, Gas Turbine World, May-June 2006

250 MW demo plant project. Gasifier and combined cycle machinery should be ready to start IGCC operational testing in late 2007. Plant is sized to gasify 1700 tpd of powdered coal for a net output of 220 MW at 42% net efficiency (LHV).

Mitsubishi Heavy Industries is supplying a 250 MW coal-based integrated gasification combined cycle plant in Japan for mid-2007 startup. It is being built at roughly one-half commercial scale as a demonstration unit to prove out new technologies for an advanced IGCC plant. Highlights:

Plant rating. Net 220 MW output with 8125 Btu/kWh net plant heat rate (LHV) or 42% efficiency on 135 Btu/scf syngas fuel.
Power block. Modified M701DA gas turbine with air extraction for the gasifier, HRSG, and oversized steam turbine.
Gasifier. Two-stage dry feed air-blown entrained-flow gasifier, sized to process 1700 tpd coal feedstock, followed by cold gas cleanup.
Emissions. Below 5 ppm NOx with selective catalytic reduction and below 8 ppm SOx after wet chemical absorption for sulfur removal.

Mitsubishi Debuts G2 Technology

Mitsubishi’s next-generation 50Hz M701G2 was featured in recent editions of both Gas Turbine World and Diesel & Gas Turbine Worldwide. The uprated design, which successfully completed shop load testing earlier this year, combines proven design elements of the original Mitsubishi G-Series turbines with advanced steam-cooling and combustor technology to achieve near-H performance.

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