CoCu/ZSM-5负载型催化剂对甲苯的催化氧化性能研究
Study on the Catalytic Performance of CoCu/ZSM-5 Catalyst for Toluene Oxidation
方升响 1辛道旭 1张瑞 1王帅 1常浩然 1刘琼玉2
作者信息
- 1. 江汉大学环境与健康学院 湖北 430056
- 2. 江汉大学环境与健康学院 湖北 430056;湖北省气体净化企校联合创新中心 江汉大学 湖北 430056
- 折叠
摘要
采用溶胶凝胶法制备了系列低负载量的CoCu/C-ZSM-5 负载型催化剂.结果表明,10%Co0.75Cu0.25/C-0.8 催化剂对甲苯的催化氧化性能最佳,其T90 为 239.3℃,接近于贵金属催化剂的催化氧化性能.通过XRD、FTIR、TEM、BET和XPS等方法进行表征,结果表明,制备的CoCu/C-ZSM-5 催化剂保持了ZSM-5 分子筛的结构特性,且活性组分均匀分布.此外,催化剂具有丰富的孔道结构,有利于甲苯的传质.XPS结果表明制备的系列CoCu催化剂中Co0.75Cu0.25/C-0.8 的Co3+/Co2+、Cu+/Cu2+和Oα/Oβ比例最高,有利于甲苯低温催化氧化,且Cu的掺杂提升了Co对甲苯的催化活性.因此,为VOCs的高效催化氧化处理提供了新的解决方案,具有较强应用价值.
Abstract
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.
关键词
ZSM-5分子筛/复合金属氧化物/甲苯/催化氧化Key words
ZSM-5 zeolite/composite metal oxide/toluene/catalytic oxidation引用本文复制引用
出版年
2025
NETL
NSTL
万方数据