Dry desulfurization of simulated flue gas in a fluidized-bed reactor for a broad range of SO2 concentration and temperature:: A comparison of models

In this work, dry desulfurization of simulated flue gas was investigated in a batchwise operated laboratory-scale stainless steel fluidized-bed reactor (46 x 500 mm(2)) by using calcium-containing local Turkish limestone (Karaagach/MUS) which was calcined at 900 degrees C with 5% H2O vapor. The sulfation reaction was carried out in a broad range of temperature (200 less than or equal to T(degrees C) less than or equal to 900) and SO2 feedstock concentration (1000 less than or equal to C(ppm SO2) less than or equal to 6000). The experimental sulfation conversion-time data were tested according to unreacted shrinking core model (SCM), changing the grain size model (GM) and random pore model (RPM). It was found that the random pore model with control of product layer (CaSO3/CaSO4) diffusion described the experimental data best.