Trends in Research and Technical Development of Sorbents for Hot Gas Desulfurization for H₂S Removal

Abstract

Theoretical reviews of integrated gasification combined cycle one of the clean coal technologies and trends in the study and technology development for high temperature desulfurization sorbents were investigated. Reactivity, durability and abrasion resistance is an important key for development of high temperature desulfurization sorbents, the kind of things include calcium, zinc, manganese, iron and copper-based sorbents. Current status of high temperature desulfurization sorbents, manufacturing techniques of zinc-based sorbent in advanced countries has commercialized. In case of Korea, various research studies are underway to commercialize the Zn and non Zn-based high temperature desulfurization sorbents to cheaper and superior capability using various supports.

Investigation on the Cause of the SO2 Generation during Hot Gas Desulfurization (HGD) Process

“…In addition, the reason for SO 2 generation is still unknown [18][19][20]. There are some studies reporting that the formation of SO 2 is due to the reaction between the side products (ZnSO 4 ) of the desulfurization and H 2 O [21][22][23][24][25][26][27]. Park et al [25,26] also observed SO 2 during desulfurization over the reaction between the reducing gases (CO and H 2 ) and ZnSO 4 , which was produced during the regeneration of sorbent under conditions of a low regeneration temperature and an excessive O 2 injection.…”