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Recovered Energy System TM
Air emissions from IGCC gasification plants are far below U.S. Clean Air Standards. Sulfur removal and emissions of sulfur dioxide, NOX and carbon monoxide are far below normal coal fired power plants, incinerators, combustors and most other gasifiers. However, they still contribute significantly to the "greenhouse effect" because all the gases they emit are new greenhouse gases.
In principal, an IGCC gasification plant is very similar to a Recovered Energy Systemô plant. There are, however, a few differences. The reactor for an IGCC gasification plant is pressurized and in general requires pure oxygen. REI has an option of using either normal air or pure oxygen. The use of oxygen reduces the size of the reactor but an oxygen plant is very expensive and dangerous. The BTU value of coal is 2 to 3 times that of municipal waste. Therefore, when considering both the BTU value and the impact of oxygen, the reactors for an IGCC gasification plant are about ľ the size of an REI reactor to process the same volume of waste. The pollution control equipment is similar other than the size difference. The synfuel from a large-scale gasifier has a higher BTU value than the synfuel from the REI process, which makes the turbine combustor different and an IGCC gasification plant has the compressor on the front end whereas REI has the compressor just in front of the gas turbine.
It would be possible for an IGCC gasification plant to use MSW as a feedstock with some modifications to the system. Various IGCC gasification companies have considered the possibility but they have not yet refined the feed system for MSW and they would also require drying, sorting and the use of RDF. Currently over 98% of all IGCC gasification plants use coal, petroleum coke, fuel oil, refinery tars or natural gas as a feedstock
IGCC gasifiers are inferior to plasma gasifiers for the following reasons:
Waste to Energy
Biological Waste Processing
Small Scale Gasification
Coal Gasification (IGCC)
Standard Oil Water Separation
Offshore Platform Oil Water Separation
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