Development of hot coal gas desulfurization process (dry process) is necessary to get high thermal efficiency in Integrated Coal Gasification Power Generation System. Fixed bed desulfurization process using Fe2O3 sorbents have been researched and developed at Yokosuka Research Laboratory.
In this study, pellet type Fe2O3 sorbents were prepared and characteristics of sorbents for H2S sorption was studied using packed bed reactor. The following results were obtained.
(1) Characteristics for H2S sorption was independent of support materials (SiO2, SiO2-Al2O3, Al2O3). Fe2O3 content must be below 20wt% to keep off crack caused by carbon deposition.
(2) H2S sorption capacity (Fe2O3-SiO2, Fe2O3-SiO2-Al2O3) was 2.5×10-3mol/g. All of Fe2O3 contained in sorbents were converted to FeS.
(3) Apparent activation energy was 11kJ/mol. H2S sorption rate at 2.1MPa was two times as fast as the rate at atmospheric pressure.
