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Discusses how fluidized bed coal combustion/partial gasification combined cycle (topping cycle or second generation PFBC) has the potential to provide high efficiency sulfur capture with limestone through two reactions. To design a gasifier for topping cycle the kinetic information on sulfidation reactions is very important since they are supposed to be not so rapid. In this work attention was focused...
Details a study of the reactivities of two sorbents, a limestone and a semi-calcined dolomite, with H 2 S under simulated pressurized coal gasification donditions by thermogravimetry (TGA) techniques. Although the activation energies for both sorbents were 180 kJ/mol, the initial reaction rate of the semi-calcined dolomite (50 μm) was 30 times faster than that of the limestone (50 μm)...
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