Effects of support property on the catalytic performance of CeO₂-ZrO₂-CrO_x for 1,2-dichloroethane oxidation

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• 作者：Fei TAO ((陶 飞)) ; Shanshan YANG ((杨姗姗)) ; Peng YANG ((杨 鹏)) ; Zhinan SHI ((石智男)) ; Renxian ZHOU ((周仁贤)) ; ^{zhourenxian@zju.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：acidic support ; composite oxide ; catalytic oxidation ; thermal stability ; 1 ; 2-dichloroethane ; rare earths
• 刊名：Journal of Rare Earths
• 出版年：2016
• 出版时间：April 2016
• 年：2016
• 卷：34
• 期：4
• 页码：381-389
• 全文大小：1640 K

文摘

HZSM-5, Al₂O₃, TiO₂ and SiO₂ supported CeO₂-ZrO₂-CrO_x catalysts were prepared by deposition-precipitation method and tested for deep catalytic oxidation of 1,2-dichloroethane (DCE), as one of the common chlorinated organic pollutants. All the catalysts were characterized by means of N₂ adsorption-desorption, X-ray photoelectron spectroscopy (XPS), ammonia-temperature-programmed desorption (NH₃-TPD) and hydrogen temperature-programmed reduction (H₂-TPR). The characterization results revealed that there was strongly synergistic effect between the oxidizability of CZCr species and the acidity of supports, which obviously promoted the catalytic activity for DCE degradation. 20%CZCr/HZSM-5 showed the highest activity and good durability during the long-term continuous test. The catalytic activity decreased in the order: 20%CZCr/HZSM-5>CZCr>20%CZCr/TiO₂>20%CZCr/Al₂O₃>20%CZCr/SiO₂.