1. MOFs-derived CuCeOx supported on H-zeolite socony mobile-5 for catalytic oxidation of 1,2-dichlorobenzene.
- Author
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Han, Shuai, Meng, Ke, Fan, Yun, Ma, Huilian, Zhang, Yichi, Yang, Jiajia, Zhang, Haijun, and Chen, Jiping
- Subjects
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CATALYTIC oxidation , *METAL-organic frameworks , *CHLOROHYDROCARBONS , *AROMATIC compounds , *INDUSTRIAL capacity - Abstract
[Display omitted] • CuCeO x /HZSM-5 complex catalyst is prepared by impregnation-pyrolysis method. • Carboxylated HZSM-5 promotes better contact with MOFs, forming a core–shell structure. • Using MOFs as precursors enables uniform deposition of CuCeO x on HZSM-5. • Acid and redox properties have an important influence on CAHs catalytic oxidation. The catalytic elimination of chlorinated aromatic hydrocarbons is the frontier of catalytic oxidation of organic pollutants, and the screen of efficient catalysts (low cost, high activity, durability and selectivity) remains challenging. In this work, the CuCeO x derived from metal-organic frameworks supported on H-zeolite socony mobile-5 (HZSM-5) complex catalyst (CuCeO x -H-C) was prepared through impregnation combined with pyrolysis and applied in the catalytic oxidation of 1,2-dichlorobenzene. The results indicate that the introduction of carboxyl groups on the surface of HZSM-5 is crucial for the formation of Ce-MOF/HZSM-COOH core–shell structure. This introduction facilitates the uniform deposition of CuCeO x on HZSM-5 and significantly enhances the overall acidity. Furthermore, the synergistic effect of Cu-Ce significantly enhanced the catalyst's activity at low temperatures. Therefore, CuCeO x -H-C exhibited the highest activity, with a T 90 of 236 °C. Additionally, the CuCeO x -H-C catalyst showed high selectivity for HCl and suppressed the generation of chlorinated by-products. The differences in catalyst activity among various catalysts arise from multiple factors, including specific surface area, dispersion of active species, oxygen mobility, oxygen storage capacity, redox properties, and others. Under the synergetic effects of above-mentioned factors, the activity of CuCeO x -H-C is remarkably enhanced and would be promising for potential industrial application. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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