Department of Chemistry, Tianjin University, Tianjin 300072, PR China.
J Hazard Mater. 2013 Mar 15;248-249:81-8. doi: 10.1016/j.jhazmat.2012.12.053. Epub 2013 Jan 5.
Several MCM-41 materials were synthesized at different conditions by hydrothermal procedure using cheap and easily available industrial water glass as silica source. Fe doped manganese-based oxide/MCM-41 sorbents were prepared by a sol-gel method. The effects of loadings of metal oxide, Fe/Mn molar ratios over MCM-41 and reaction temperature on the performance of sorbent for hot coal gas desulfurization were investigated. Various techniques such as BET, XRD, XPS, LRS and HRTEM were used to characterize the sorbents. The result indicated Fe(3+) ions could occupy a position of Mn(3+) in cubic lattice of Mn2O3 and the (FexMn2-x)O3 solid solution is mainly active phase of sorbent. Moreover, the result of nine successive sulfurization-regeneration cycles of sorbent showed high sulfur adsorption capacity and endurable stability of FeMn4Ox/MCM-41 for H2S removal.
采用水热法以廉价易得的工业水玻璃为硅源，在不同条件下合成了几种 MCM-41 材料。采用溶胶-凝胶法制备了 Fe 掺杂锰基氧化物/MCM-41 吸附剂。考察了金属氧化物负载量、Fe/Mn 摩尔比和反应温度对热煤气脱硫用吸附剂性能的影响。采用 BET、XRD、XPS、LRS 和 HRTEM 等多种技术对吸附剂进行了表征。结果表明，Fe(3+) 离子可以占据 Mn2O3 立方晶格中 Mn(3+)的位置，(FexMn2-x)O3 固溶体是吸附剂的主要活性相。此外，吸附剂连续进行了九次硫化-再生循环实验，结果表明，FeMn4Ox/MCM-41 具有较高的 H2S 吸附容量和可耐受的稳定性。
