HIGH-TEMPERATURE H2S REMOVAL OVER HIGH SPECIFIC SURFACE-AREA BETA-SICSUPPORTED IRON-OXIDE SORBENT - PART 1 PREPARATION AND CHARACTERIZATION

Iron oxide sorbents supported on high surface area (49 m(2) g(-1)) SiC have been prepared and characterized. The results show that several f orms of iron oxide can coexist including gamma-Fe2O3, alpha-Fe2O3 and an amorphous phase, and these phases are homogeneously dispersed on th e SiC surface (particle size from 1 to 5 nm). After controlled calcina tion the sorbent pore size distribution, measured by N-2 adsorption, r anged from 2.5 to 50 nm, which allowed a high accessibility of the rea ctant gas without microdiffusion phenomena.