High-Temperature Desulfurization Of Coal Gas With Sm Adopted Mn-based Support MSU-S Sorbents

Hexagonally order mesoporous MSU-S assembled from nano-clustered zeolite seeds was prepared as support due to rich acidity and good steam stability. The XRD and BET results revealed that the MSU-S treated in steaming at 800 oC for 2 h still remained a well-ordered hexagonal structure. A series of Mn-based oxide/MSU-S sorbents were prepared by a sol gel method using the Sm2O3 and manganese oxides supported on novel and high stable MSU-S. The desulfurization performances of these sorbents were evaluated over a fixed-bed reactor and the properties of hot coal gas desulfurization for sorbents was improved due to high hydrothermal stability of MSU-S with high surface area as well as the synergistic effect between Mn and rare-earth oxides. In addition, the effects of reaction temperature, feed composition and Sm/Mn atomic ratio in sorbents on desulfurization performance are investigated. The result of eight successive sulfurization/regeneration cycles of sorbent showed high sulfur adsorption capacity and endurable stability of 55%5Sm95Mn/MSU-S for H2 S removal. The sorbents were characterized using X-ray Photoelectron Spectroscopy(XPS), Temperature-program desorption of ammonia(NH3-TPD), N2-adsorption,27 Al magic angel spin nuclear magnetic resonance(27Al MAS NMR), temperature-programmed reduction of H2(H2-TPR), high-resolution transmission electron microscopy(HRTEM), X-ray diffraction(XRD),thermal gravimetry and differential scanning calorimeter(TG/DSC) techniques.