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|Title:||Efficiency of Desulfurization in Sub-stoichiometric Pressurized Fluidized Bed Combustion of Coals - Theoretical and Practical Problems|
|Authors:||POHORELY Michael; SCHOSGER JEAN-PIERRE; BAXTER DAVID; ROGUT Jan|
|Other Contributors:||SVOBODA Karel|
|Citation:||Proceedings of 17th International Congress of Chemical and Process Engineering, 27 - 31 August 2006, Prague, Czech Republic|
|Publisher:||Czech Society of Chemical Engineering|
|Type:||Contributions to Conferences|
|Abstract:||Pressurised combustion technologies have been developed to achieve higher overall thermal efficiency by means of combined gas and steam cycles. The new generation of pressurized combustion technologies, e.g. the advanced, staged pressurized fluidized bed combustion (PFBC), is focused on further increase of temperature at the gas turbine inlet by two stage gasification/combustion and on resulting increase of the efficiency 1, 2. In the first stage of the process (sub-stoichiometric combustion) the synthetic gas is produced at temperatures in the range 800 - 950 oC . The gas is cleaned at elevated temperatures (over 600 oC) and burned in the second stage with preheated air to attain temperatures around 1200 oC, commonly the limit of present generation gas turbines. The suitable temperature range in the first stage is limited by sufficiently fast gasification, by efficient desulfurization of the synthetic gas by limestone (to avoid secondary measures for SO2 emission treatment) and by the onset of particle agglomeration in sub-stoichiometric PFBC.|
|JRC Institute:||Institute for Energy and Transport|
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