CATALYTIC DEGRADATION PERFORMANCE OF TOLUENE OVER CuxMn1-xCe0.75Zr0.25Oy
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摘要: 采用溶胶凝胶法制备了双主金属、双助剂的CuxMn1-xCe0.75Zr0.25Oy催化剂,在固定床反应器中评价了催化剂降解甲苯的性能,并采用XRD、H2-TPR、O2-TPD和Raman对催化剂进行表征。试验结果表明:催化剂中Cu含量的增加有助于增强Cu-Ce金属之间的相互作用,增加催化剂中的氧空位浓度和晶格氧含量,提高催化剂低温还原性,从而促进催化活性的提高。Cu1CeZr催化剂降解甲苯活性最好,其完全降解甲苯的温度(T100)为220℃,比Mn1CeZr催化剂低60℃。Abstract: A series of bimetallic and biassistant CuxMn1-xCe0.75Zr0.25Oy catalysts were prepared by sol-gel method. The catalytic degradation performance of toluene over the catalysts was tested in a fixed-bed reactor. The relationships between the catalytic activity of toluene degradation and catalyst structure were explored by XRD, H2-TPR, O2-TPD and Raman methods. It was found that the increase of copper content could enhance the interaction between Cu-Ce, and improve the oxygen vacancy concentration, lattice oxygen content and low temperature reducibility, thus promote the catalytic activity. Cu1CeZr catalyst exhibited the best activity for toluene degradation, and the temperature of complete degradation of toluene was 220℃, which was 60℃ lower than that of Mn1CeZr catalyst.
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Key words:
- Ce-Zr /
- Cu /
- Mn /
- sol-gel method /
- catalytic degradation /
- toluene
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