New development of zinc-based sorbents for hot gas desulfurization

摘要

This paper introduced two new zinc-based sorbents for hot gas desulfurization,G-201 and G-202.Evaluation tests proved that both G-201 and G-202 sorbents had good performance in desulfurization.They could reduce H2S concentration from about 10 g/m3 in coal gas to less than 20 mg/ m3.In addition,the sulfur capacity of both sorbents increased with temperature rising.No decrease in sulfur capacity of G-201 occurred during 20-desulfurization/regeneration cycle tests,whose calculated value was 19.43-24.23 g/100 g sorbent.G-201 sorbent passed a 1500 h real hot gas desulfurization test in a fixed-bed PDU.No occurence of striping,attrition and sintering on the surface of used sorbents was found after the longtime test.The reactivity was stable and the sulfur capacity is 21.19 g/100 g sorbent after the 1500 h test.