▎ 摘　　要

Stability and deactivation of paper-like sintered stainless steel fibers-graphene (PSSF-Gr) catalyst for catalytic wet peroxide oxidation (CWPO) of phenol are investigated in a fixed-bed reactor. First, the PSSF-Gr catalyst with three-dimensional structure is synthesized by a chemical vapor deposition (CVD) technique. Then, the effect of residence time on the stability of the PSSF-Gr catalyst is explored by different catalyst bed height. Finally, the deactivation mechanisms of the PSSF-Gr are investigated by SEM, EDS, XRD, Raman spectroscopy, AAS, FTIR, TG, NH3-TPD, CO2-TPD, GC and XPS, respectively. The PSSF-Gr with residence time of 1.46 min exhibits a high phenol conversion (above 90%) after continuously operation for 72 h, but the total organic carbon (TOC) conversion experiences a downward 38 h later. However, when the residence time is increase to 5.84 min, the PSSF-Gr always achieves complete phenol conversion after continuously treatment for 96 h, and the TOC conversion always remains more than 81% within 72 h, but the TOC removal starts to decline 72 h later. After analyzing fresh and these two used PSSF-Gr catalysts, it can be summarized that the deactivation of PSSF-Gr is ascribed to the collapse of PSSF support structure, the change of graphene intrinsic properties, and the deposition of carbonaceous compounds.