Sulfur-resistance iron catalyst in sulfur-containing VOCs abatement modulated through H2 reduction

The deactivation of catalyst was not only resulted from coke deposit, but also caused by sulfur poisoning. The experiments showed that the sulfur resistance performance of the reduced Fe-based catalysts were improved, but the corresponding mechanism was not well established. Herein, a simple strategy modulated through direct H2 reduction method was provided to anchor Fe sites within hydroxyl groups on the silica-based SBA-15 support, which could effectively modulate the electronic environment and oxidation states of the Fe species. The catalyst prepared from direct H2 reduction process formed strong interaction between Fe and the support, which displayed efficient and stable sulfur resistance of the catalysts. The comparison of structure and chemical environment of the catalysts from different oxidation conditions were conducted by various characterizations of XRD, XPS, TEM, UV–vis, NH3-TPD, O2-TPD, Pyridine FT-IR and in-situ FT-IR.