CeO2–MnOx/ZSM-5 sorbents for H2S removal at high temperature

x Ce y Mn/ZSM-5 sorbents were prepared using sol–gel method and employed for H 2 S removal in the temperature range of 600–800   °C. The sorbents exhibited high performance in sulfur removal due to the cooperative effect of CeO 2 and MnO x . The presence of H 2 was unfavorable for sulfidation and obviously shortened the breakthrough time and reduced the sulfur capacity. However, the existence of CO had little impact on the sulfur-removal performance. The characterization results revealed that the ZSM-5 structure remained intact during preparation and sulfidation process. And active species, such as CeO 2 and Mn 2 O 3 , were well dispersed on ZSM-5, which would suppress the mechanical disintegration and improve the thermal stability of x Ce y Mn/ZSM-5.