Reactivity of copper oxide-based sorbent in coal gas desulfurization

Various CuO-based sorbents were prepared to investigate effects of sorbent ingredients such as SiO2, MnO2, and MoO3 on desulfurization reactivity. Sev eral candidate sorbents chosen from a TGA screening test were further teste d in a microreactor system. The amount of SiO2 support to minimize sinterin g of sorbents was 25 wt%. Sulfur loading was seriously affected by the amou nt of additives (MnO2, MoO3) in a multi-cycle test. Improvement of sulfur l oading by the additives was observed in the multi-cycle test. Effects of su pport materials on sulfur loading were also investigated by using SiO2, gam ma -alumina and zeolite. SiO2 showed the best performance among the support candidates. The sorbent showing the best sulfur loading ability was CMS6 ( CuO:MoO3:MnO2: SiO2=61 :11 :3 :25). Its sulfur loading reached up to 13.8 g sulfur/100 g sorbent in a multi-cycle test.