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 Fe
2O
3 sorbents have been researched and developed at Yokosuka Research Laboratory.
In this study, pellet type Fe
2O
3 sorbents were prepared and characteristics of sorbents for H2S sorption was studied using packed bed reactor. The following results were obtained.
(1) Characteristics for H
2S sorption was independent of support materials (SiO
2, SiO
2-Al
2O
3, Al
2O
3). Fe
2O
3 content must be below 20wt% to keep off crack caused by carbon deposition.
(2) H
2S sorption capacity (Fe
2O
3-SiO
2, Fe
2O
3-SiO
2-Al
2O
3) was 2.5×10
-3mol/g. All of Fe
2O
3 contained in sorbents were converted to FeS.
(3) Apparent activation energy was 11kJ/mol. H
2S sorption rate at 2.1MPa was two times as fast as the rate at atmospheric pressure.
View full abstract