Influence of catalyst pretreatments on the catalytic oxidation of toluene over nanostructured platinum based spent catalyst.
In this study, we regenerated a nano-structured platinum based spent catalyst by applying thermal gas and acid pretreatment and examined the influence of treatment on the catalytic oxidation of toluene. The spent catalysts were pretreated with air, hydrogen and six different acid aqueous solutions (HCl, H2SO4, HNO3, H3PO4, CH3COOH and C2H2O4). The physicochemical properties of the parent and its modified catalysts were characterized by XRD, BET, TEM, and ICP. The results of light-off curves showed that air and hydrogen treated catalysts were more active than the parent catalyst. In addition, the catalytic activities of toluene oxidation for acid aqueous treated samples were identical with the order of Pt/Al ratio.
Department of Applied Chemical Engineering, Chonnam National University 300 Yongbong Dong, Buk-Ku, Gwangju 500-757, Korea.
Wang-Geun
WG
Shim
Jae-Wook
JW
Lee
Sang-Chai
SC
Kim
D002384:Catalysis; D003460:Crystallization / Q000379:methods*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods*; D010084:Oxidation-Reduction; D010100:Oxygen / Q000737:chemistry*; D010316:Particle Size; D010984:Platinum / Q000737:chemistry*; D013499:Surface Properties; D014050:Toluene / Q000737:chemistry*
D046911:Macromolecular Substances; D014050:Toluene; D010984:Platinum; D010100:Oxygen