Coal gasification process cell

If a membrane is manufactured so as to be already in equilibrium with the gas to be treated, it will not have to undergo the stresses inherent in the density changes associated with sulfiding a carbonate membrane or carbonating a sulfide membrane. While techniques for manufacturing such a membrane are still imder study, the concept has been successfiiUy used in both the coal gasification process cell d and the natural gas process cell ... 

Rapid thermal processing Special Report on Emission Scenarios Solid oxide fuel cell Shell coal gasification process Technical University... 

Significant effort is underway in the United States to develop and commercialize coal gasification processes for producing gaseous fuels One of the major obstacles in the development of such a process is the presence of undesirable contaminants in the product gas stream. The major contaminant in coal gasification is hydrogen sulfide (H2S), which is toxic, poisonous to downstream catalysts and extremely corrosive in nature. Control of H2S in the fuel gas to a safe level is therefore essential. The H2S removal requirements are even more critical when the fuel gas is used in combined cycle power generation or in fuel cells. 

Typical low-temperature proton exchange membrane fuel cells (LT-PEMFCs), operated at temperatures lower than 90 °C, use H2 as fuel. H2 is not a naturally occurring resource, and is mainly produced by reforming organic fuels such as natural gas and methanol or by coal gasification. The reforming process produces H2 with traces of impurities, mainly CO, H2S, and SO2, among which CO is the... 

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