Oxidation of organic substances in aqueous solutions over Ru catalysts by oxygen |
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| Institution: | 1. UFZ—Helmholtz Centre for Environmental Research, Department of Proteomics, 04318 Leipzig, Germany;2. School of Environmental Sciences, University of East Anglia, Norwich NR4 7TJ, UK;3. UFZ—Helmholtz Centre for Environmental Research, Department of Environmental Microbiology, 04318 Leipzig, Germany;4. UFZ—Helmholtz Centre for Environmental Research, Department of Isotope Biogeochemistry, 04318 Leipzig, Germany;5. UFZ—Helmholtz Centre for Environmental Research, Department of Metabolomics, 04318 Leipzig, Germany;6. Aalborg University, Department of Biotechnology, Chemistry and Environmental Engineering, Aalborg University, 9000 Aalborg, Denmark;7. University of Hohenheim, Institute of Animal Nutrition, 70599 Stuttgart, Germany;1. Promising Centre for Sensors and Electronic Devices (PCSED), Najran University, P.O. Box-1988, Najran 11001, Kingdom of Saudi Arabia;2. Department of Chemistry, College of Science and Arts, Najran University, P.O. Box-1988, Najran 11001, Kingdom of Saudi Arabia;3. PG Department of Chemistry, JCDAV College (Panjab University), Dasuya 144205, Punjab, India;4. Department of Physics, Faculty of Science, King Khalid University, P.O. Box-9004, Abha, Kingdom of Saudi Arabia;5. Department of Physics, College of Science and Arts, Najran University, P.O.Box-1988, Najran 11001, Kingdom of Saudi Arabia;1. Instituto de Carboquímica, ICB-CSIC, Zaragoza, Spain;2. Department of Applied Physics and Electromagnetism, Universitat de Valencia, Valencia, Spain;3. Department of Chemical Engineering, Universitat de Valencia, Valencia, Spain;4. ICMUV, Universitat de València, Valencia, Spain;5. Department of Chemical Engineering, University of Bath, Bath BA2 7AY, UK |
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| Abstract: | The catalytic performance of supported Ru catalysts has been studied in the reactions of wet oxidation of acetonitrile, N,N-dimethyl formamide and carbamide at T=433–533 K and P=2.0–4.6 MPa, and wet oxidation of real sewage from an alcohol plant (so-called Luther water) at T=403–473 K and P=1.5–3.6 MPa. The Luther water contained a mixture of low-boiling (C1–C5) aldehydes and alcohols. The experiments were carried out in a perfectly mixed batch autoclave reactor. The conversion of alcohols and aldehydes contained in the Luther water and selectivity of the process towards CO2 and water as well as the selectivity of the oxidation of acetonitrile, N,N-dimethyl formamide and carbamide towards CO2, N2 and water were determined at various temperatures and reaction times. Ru (4.8 wt.%)/graphite-like carbon was effective in the oxidation of Luther water (ΔTOC=97.5% at T=423 K for 1 h), carbamide (XCO(NH2)2=100%, SCO(NH2)2→CO2=100%, SCO(NH2)2→N2=71% at 473 K, 2 h) and acetonitrile (XCH3CN=100%, SCH3CN→CO2=100%, SCH3CN→N2=75% at 493 K, 1 h). Ru/active carbon/γ-Al2O3 was effective in the oxidation of N,N-dimethyl formamide (XHCON(CH3)2=100%, SHCON(CH3)2→CO2=61%, SHCON(CH3)2→N2=100% at 493 K). |
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