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Improved activity and stability of chlorobenzene oxidation over transition metal-substituted spinel-type catalysts supported on cordierite

Huang, Q., Xu, G., Zhang, K., Zhu, J., Si, H., Yang, B., Tao, T., Zhao, Y., Chen, M. and Yang, H. ORCID: https://orcid.org/0000-0001-9940-8273 (2021) Improved activity and stability of chlorobenzene oxidation over transition metal-substituted spinel-type catalysts supported on cordierite. Catalysis Letters, 22. ISSN 1011-372X

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To link to this item DOI: 10.1007/s10562-020-03494-4

Abstract/Summary

Industrial catalysts usually encounter great challenges in Cl· deactivation, toxic by-products generation, and stability with a long running operation for catalytic oxidation of chlorinated volatile organic compounds (CVOCs). In this research, spinel-type oxides with transition metal substituted as active oxides supported on cordierite (Crd) was identified to catalytic degradation of chlorobenzene (CB). The Cu1.4Mn1.6O4 spinel-type oxides considered as the main active oxides have been identified, which were confirmed by XRD and TEM. The activities of these CuMxMn2-xO4 catalysts were markedly improved by lower calcining temperature and shorter time. CuCe0.25Mn1.75O4/Crd catalyst displayed the highest activity and good stability due to that CeO2 nano-rods structure conducive to increase the Oads amount, the dispersion of active oxides, the strength of weak acidity, the surface areas and pore volume. Moreover, spinel-type with CeO2 doping exhibited high performance in CVOCs elimination attributed to the high storage capacity of oxygen, plentiful oxygen vacancies, good efficiency in breaking C-Cl bond and the easy shuttles between Ce3+ and Ce4+, which were demonstrated by XPS. The results indicate that CeO2, Oads, and ·OH have beneficial effects on the removing Cl· into benzene, and then improving the ring-opening of CB for CB degradation.

Item Type:Article
Refereed:Yes
Divisions:Science > School of Archaeology, Geography and Environmental Science > Department of Geography and Environmental Science
ID Code:95942
Publisher:Springer

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