Study on the Catalytic Performance of CoCu/ZSM-5 Catalyst for Toluene Oxidation
A series of CoCu/C-ZSM-5 catalysts with low loading were prepared by sol-gel method.The results show that the 10%Co0.75Cu0.25/C-0.8 catalyst exhibits the best performance in the catalytic oxidation of toluene,and the T90 is 239.3℃,which is close to the performance of the noble met-al catalyst.The catalyst was characterized by XRD,FTIR,TEM,BET and XPS.The results showed that the catalyst maintained the structural charac-teristics of ZSM-5 molecular sieve and the active components were evenly distributed.In addition,the catalyst has rich pore structure,which is con-ducive to the mass transfer of toluene.The XPS results show that the Co3+/Co2+,Cu+/Cu2+and Oα/Oβ ratios of Co0.75Cu0.25/C-0.8 are the highest in the prepared series of catalysts,which is beneficial to the catalytic oxidation of toluene at low temperature.The doping of Cu enhances the catalytic ac-tivity of Co for toluene.This study provides a new solution for the efficient catalytic oxidation of VOCs,which has strong application value.
ZSM-5 zeolitecomposite metal oxidetoluenecatalytic oxidation
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