Sulphur dioxide removal from flue gases

Taieb, D., Ben Brahim, A. (2013). Electrochemical method for sulphur dioxide removal from flue gases application on sulphuric acid plant in Tunisia. Comptes Rendus Chimie, 16( ), 39-50. http //dx.doi.0rg/lO.lOl6/j.crci.2Oi2.O8.OO9. 

Krammer, G., and Staudinger, G., Sulphur dioxide removal from flue gas with dry limestone. Gas Sep. Purif.. 

In the 1960s there were attempts to use a moving bed of carbon to remove sulphur dioxide from flue gas on a pilot scale. As described by Katell(46) and Cartelyou(47), this Reinluft process was abandoned because of the problems caused by the carbon igniting in the presence of oxygen. 

In liquid fuels, the sulphur is present in many different chemical forms primarily combined in organic molecules such as sulphides, disulphides and mercaptans. To remove it from the liquid fuel, the sulphur values are converted to hydrogen sulphide by reaction with hydrogen. At present solid fuels (coal) are usually combusted prior to removal of sulphur and the resulting sulphur dioxide is scrubbed from the flue gas producing waste sludge or by-product acid. However, most coal liquifaction and gasification processes favor removal of sulphur... 

For geo-sequestration of carbon dioxide in flue gas it may be necessary to first remove sulphur so as to protect the carbon dioxide solvent. The flow from the flue system has to be modified to include an additional plant prior to compression, carbon dioxide and geosequestration as illustrated by Figure 6.3. 

The first operation is to remove residual heat from the flue gas and potentially generate steam which can be used in the carbon dioxide scrubber (MEA). Next, the flue gas is treated with limestone to reduce the sulphur content of the gas stream. The stream is then compressed to a... 

Sulphur dioxide (SO2) is one of the main impurities in the flue gas from a coal-fired power plant. Indeed, calcium-based sorbents, such as limestone, are also commonly used to remove SO2 from flue gases of fluidized bed combustors [22-24]. At the typical combustion temperatures of 800-900 °C, CaCOs decomposes to CaO and CO2. Subsequently, CaO reacts with SO2 and O2, or with SO3, to form CaS04. Thus, the overall SO2 capture process proceeds according to the following two-step process ... 

Sulphur mustard" (HD) is burned to generate carbon dioxide (CO2) and water besides the environmental pollutants sulphur dioxide (SO 2) and hydrogen chloride (HCl), which have to be removed from the flue gas. 

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