CO preferential oxidation in H2-rich stream over the CuO-MnOx mixed oxide catalysts prepared by a facile mechanochemical preparation method |
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| Affiliation: | 1. Department of Chemical Engineering, Biotechnology and Materials, FCFM, University of Chile, Santiago, Chile;2. Department of Chemical Engineering, University of Notre Dame, Notre Dame, USA;3. Department of Physics, University of Concepción, Concepción, Chile;4. School of Chemical Sciences and Engineering, Yachay Tech University, Urcuquí, Ecuador;1. Centre for Advanced Materials and Industrial Chemistry (CAMIC), School of Science, RMIT University, GPO BOX 2476, Melbourne, VIC, 3001, Australia;2. Chemical Engineering, College of Engineering and Applied Science, University of Cincinnati, Cincinnati, OH, 45221-0012, United States;3. Department of Chemistry, Osmania University, Hyderabad, 500 007, India;4. Laboratory of Advanced Catalysis for Sustainability, School of Chemistry, University of Sydney, Sydney, NSW, 2006 Australia;5. Department of Chemistry and Materials Center for Sustainable Energy & Environment, Birla Institute of Technology & Science (BITS) Pilani, Hyderabad Campus, Hyderabad, 500 078, India;1. Institut de Recherches sur la Catalyse et l’Environnement de Lyon, Université Lyon 1, CNRS, Villeurbanne, France;2. Normandie Univ., ENSICAEN, UNICAEN, CNRS, Laboratoire Catalyse et Spectrochimie, 14000 Caen, France;1. Instituto de Investigaciones en Catálisis y Petroquímica, INCAPE (FIQ, UNL-CONICET), Santiago del Estero 2829, 3000 Santa Fe, Argentina;2. Université de Haute Alsace (UHA), CNRS, IS2M UMR 7361, 68100 Mulhouse, France;3. Université de Strasbourg, F-67000 Strasbourg, France |
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| Abstract: | The CuMn samples with various CuO weight percentages were synthesized by the mechanochemical route. The catalytic activity of the prepared samples was determined in the preferential oxidation of CO process (CO-PROX) in the temperature range of 40–250 °C. According to the XRD results, the 5CuMn and 10CuMn samples exhibited the spinel phase in their structures. The spinel phase formation enhanced the CO adsorption active sites and modified the redox properties. The results indicated that the copper incorporation into the manganese oxide modified the catalytic activity and structural properties. The 5CuMn catalyst with the highest BET area (72.1 m2 g−1) possessed 96% CO conversion and 50% CO2 selectivity at 70 °C (GHSV = 30,000 ml/h.gcat) and significant resistance in the presence of water due to the formation of hydroxyl groups over the catalyst surface. The catalyst activity remained stable for 14 h at 130 °C. Furthermore, the influence of calcination temperature, feed composition, and GHSV value on the catalytic performance of the 5CuMn catalyst was studied. |
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| Keywords: | Hydrogen Spinel Mechanochemical Mixed-oxides Carbon monoxide |
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