Exploring the Influence of CeTiO x Morphology on Wet Catalytic Oxidation Performance of Phenol over the Ru-Based Catalyst

• Published in: Industrial & engineering chemistry research 2024-10, Vol.63 (40), p.17014-17024
• Main Authors: Zhang, Qing, Cui, Rongji, Wu, Jun, Tang, Zhicheng
• Format: Article
• Language: English
• Subjects: Kinetics, Catalysis, and Reaction Engineering
• ISSN: 0888-5885; 1520-5045
• DOI: 10.1021/acs.iecr.4c01515

Phenol is one of the predominant hazardous organic compounds found in industrial wastewater. The use of catalytic oxidation technology to eliminate phenol has garnered significant interest due to its wide applicability and substantial economic benefits on an industrial scale. In this paper, CeTiO x supports with different morphology-supported Ru catalysts were tested in the CWAO of phenol and were characterized thoroughly using XRD, Raman, BET, NH3-TPD, H2-TPR, HR-TEM, and XPS techniques. The results suggested that CeTiO x -NS and CeTiO x -NT exhibited superior performance in the oxidation of phenol compared to CeTiO x -NP due to their enhanced redox properties, higher surface acidity, and more active oxygen content. Ru/CeTiO x -NS, Ru/CeTiO x -NT, and Ru/CeTiO x -NP had comparable COD conversion rates with values of 80.8%, 83.6%, and 79.1%, respectively. However, ruthenium aggregation was observed on CeTiO x -NP, while Ru was well-dispersed on CeTiO x -NT. Additionally, stronger interaction between Ru and support was indicated by the pronounced hydrogen spillover during the reduction of Ru/CeTiO x -NT and Ru/CeTiO x -NS. Ru/CeTiO x -NS demonstrated the best catalytic stability, with only a 4.5% decrease in activity after five cycles. The resistance to carbon deposition and metal leaching of catalysts significantly influenced their stability, with carbon deposition identified as the primary factor impacting the catalyst stability.