Influence of Ru precursors on the activity of Ru/Al2O3–TiO2 catalysts for catalytic wet air oxidation of high concentration organic compounds. Issue 77 (3rd August 2016)

• Record Type: Journal Article
• Authors: Lu, Fagui; Yu, Chaoying; Meng, Xu; Zhang, Jinqi; Chen, Gexin; Zhao, Peiqing
• Is Part Of: RSC advances. Volume 6:Issue 77(2016)
• Page Start: 73810
• Page End: 73816
• Publication Date: 2016-08-03
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c6ra13235a
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : The nature of the Ru precursors affected the performance of Ru catalysts with those prepared from chloride-free Ru precursors being more active than those prepared from chlorine-containing Ru precursors. Abstract : RuCl3, Ru3 (CO)12 and Ru(NO)(NO3 )3 were used as Ru precursors to prepare supported Ru catalysts by an impregnation method. The effect of the precursors on the catalysts was investigated in the catalytic wet air oxidation (CWAO) of high concentration organic compounds. The surface properties of the catalysts were characterized by BET, XRD, XPS, TEM and H2 -TPR. The different Ru precursors led to different particle sizes and distributions, reducibilities, and content of chemisorbed as-synthesized catalysts, which resulted in discrepancies in their catalytic performances. The order of the catalyst activity was as follows: Ru(NO)/Al2 O3 –TiO2 > Ru(CO)/Al2 O3 –TiO2 > Ru(Cl)/Al2 O3 –TiO2 . The surface structure and the concentration of chemisorbed oxygen on the surface of the catalysts played important roles in the activity of the Ru catalysts in the CWAO of organic compounds.