This link has been bookmarked by 2 people . It was first bookmarked on 29 Aug 2006, by Yuichiro Hanawa.
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20 Mar 09
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An Integrated Gasification Combined Cycle, or IGCC, is a power plant using synthetic gas (syngas). This gas is often used to power a gas turbine generator whose waste heat is passed to a steam turbine system (Combined cycle gas turbine).
An Integrated Gasification Combined Cycle, or IGCC, is a technology that turns coal into gas - synthesis gas (syngas). It then removes impurities from the coal gas before it is combusted. This results in lower emissions of sulfur dioxide, particulates and mercury.
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There are currently (2007) only two IGCC plants generating power in the U.S.[citation needed]; however, several new IGCC plants are expected to come online in the U.S. in the 2012-2020 time frame. The DOE Clean Coal Demonstration Project helped construct 3 IGCC plants
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Poland's Kędzierzyn will soon host a Zero-Emission Power & Chemical Plant that combines coal gasification technology with Carbon Capture & Storage (CCS). The supplement of up to 10% biomass in the combustion process will make this plant even more environmentally-friendly.
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- None of these facilities use advanced technology ("F" type) gas turbines.
- All refinery-based plants use refinery residues, rather than coal, as the feedstock. This eliminates coal handling and coal preparation equipment and its problems. Also, there is a much lower level of ash produced in the gasifier, which reduces cleanup and downtime in its gas cooling and cleaning stages.
- These non-utility plants have recognized the need to treat the gasification system as an up-front chemical processing plant, and have reorganized their operating staff accordingly.
There are several refinery-based IGCC plants in Europe that have demonstrated good availability (90-95%) after initial shakedown periods. Several factors help this performance:
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Another IGCC success story has been the 250 MW Buggenum plant in The Netherlands. It also has good availability. This coal-based IGCC plant currently uses about 30% biomass as a supplemental feedstock. The owner, NUON, is paid an incentive fee by the government to use the biomass. NUON is contsructing a 1300 MW IGCC plant in the Netherlands. The Nuon Magnum IGCC power plant will be commissioned in 2011.
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A new generation of IGCC-based coal-fired power plants has been proposed, although none is yet under construction. Projects are being developed by AEP, Duke Energy, and Southern Company in the US, and in Europe by ZAK/PKE, Centrica (UK), E.ON and RWE (both Germany) and NUON (Netherlands). In Minnesota, the state's Dept. of Commerce analysis found IGCC to have the highest cost, with an emissions profile not significantly better than pulverized coal. In Delaware, the Delmarva and state consultant analysis had essentially the same results.
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29 Aug 06
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