SULFIDATION OF MIXED-METAL OXIDES IN A FLUIDIZED-BED REACTOR

Mixed metal oxides were used for the removal of hydrogen sulfide from a hot gas stream. Sorbents were prepared according to the dry and wet impregnation techniques. The desulfurization performance of the metal oxide sorbents was experimentally tested in a fluidized-bed reader sys tem. Sulfidation experiments performed under reaction conditions simil ar to those at the exit of a coal gasifier showed that the preparation procedure and technique, the type and the amount of the impregnated m etal oxide, the type of the solid carrier, and the size of the solid r eactant affect the H2S removal capacity of the sorbents. The pore stru cture of fresh and sulfided sorbents was analyzed using mercury porosi metry, nitrogen adsorption, and scanning electron microscopy.