The influence of the catalyst on the CO formation during catalytic wet peroxide oxidation process
[EN] Herein, the formation of carbon monoxide as a harmful product upon the Catalytic Wet Peroxide Oxidation process is studied in presence of different solid catalysts: an iron supported activated carbon catalyst, a metal-free catalyst based on Graphene Nanoplatelets, and 1.6 wt.% Fe containing CrA...
| Authors: | , , , , , , , |
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| Format: | article |
| Status: | Versión aceptada para publicación |
| Publication Date: | 2019 |
| Country: | España |
| Institution: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repository: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/264287 |
| Online Access: | http://hdl.handle.net/10261/264287 |
| Access Level: | Open access |
| Keyword: | Carbon monoxide Metal-free catalyst Catalytic wet peroxide oxidation Fenton Graphene MAX phase ddc:540 |
| Summary: | [EN] Herein, the formation of carbon monoxide as a harmful product upon the Catalytic Wet Peroxide Oxidation process is studied in presence of different solid catalysts: an iron supported activated carbon catalyst, a metal-free catalyst based on Graphene Nanoplatelets, and 1.6 wt.% Fe containing CrAlC MAX phase catalyst. The CWPO performance and the evolution of the gas effluent have been compared to that obtained in a conventional Fenton process. Carbon monoxide yield released was significantly lower in Catalytic Wet Peroxide Oxidation process in relation to that obtained in the Fenton process, where CO concentration reaches a maximum of 6651 mg/Nm. By contrast, in presence of activated carbon-Fe catalyst and, notably, Graphene Nanoplatelets and CrAlC MAX phase catalysts, a more progressive phenol and aromatics intermediates oxidation resulted in a much lower CO maximum concentration in the gas phase at the exit of the reactor of 2454 mg/Nm, 170 mg/Nm and 187 mg/Nm, respectively. Hence, when compared to the homogeneous Fenton oxidation, Catalytic Wet Peroxide Oxidation process results be a more sustainable treatment for high-loaded phenolic wastewaters by decreasing the hazardous CO gaseous emissions avoiding this way a secondary pollution during the oxidation process. |
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