Gas Cleanup Technologies

There are various technologies that can be used to remove unwanted components, including particulates, alkali, tars, sulfur, and ammonia, from the producer gas stream. The gas cleanup and conditioning technologies for gasification systems are outlined in this chapter. 

In practice, the gasifier and the gas conditioning technologies must be considered as integrated systems. 

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Hot gas cleanup technology is currently under demonstration phase, but various demonstrations have not been successful so far. Wet scrubbing technology, though with a... 

Gasifiers typically produce contaminants that need to be removed before entering the fuel cell anode. These contaminants include H2S, COS, NH3, HCN, particulate, and tars, oils, and phenols. The contaminant levels are dependent upon both the fuel composition and the gasifier employed. There are two families of cleanup that can be utilized to remove the sulfur impurities hot and cold gas cleanup systems. The cold gas cleanup technology is commercial, has been proven over many years, and provides the system designer with several choices. The hot gas cleanup technology is still developmental and would likely need to be joined with low-temperature cleanup systems to remove the non-sulfur impurities in a fuel cell system. For example, tars, oils, phenols, and ammonia could all be removed in a low-temperature water quench followed by gas reheat. 

What is the status of hot-gas cleanup technology And how would this affect the market for medium-Btu gas ... 

Gasification technologies, in combination with advancements in hot gas cleanup technologies, allow for hydrogen production with little environmental impact. 

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