La2CuO4/ZSM-5 sorbents for high-temperature desulphurization

The high-temperature H 2 S removal was conducted over x La y Cu/ZSM-5 sorbents prepared via citric acid method. The sorbents showed good desulphurization performance, the maximal sulfur capacity of 2240.5   μmol   S/g over 5La5Cu/ZSM-5 was achieved at 700   °C. The presence of H 2 obviously shortened the breakthrough time and reduced the sulfur capacity. However, the presence of CO had little influence on the desulphurization behavior. The sulfidation activity of La 2 O 3 can be significantly enhanced by introduction of Cu due to the intimate mixing of La 2 O 3 and CuO, the formation of La 2 CuO 4 compound.