Steam reforming of methanol over Cu/ZnO/Al2O3 modified with hydrotalcites |
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| Affiliation: | 1. Department of Organic Chemistry, University of Szeged, H-6720 Szeged, Dóm tér 8, Hungary;2. Department of Colloid Chemistry, University of Szeged, H-6720 Szeged, Aradi vt. 1, Hungary;3. Institut für Chemie, Technische Universität Berlin, Sekr. TC-8, Straße des 17. Juni 124, 10623 Berlin, Germany;4. Fritz-Haber Institut der Max-Planck-Gesellschaft, Abteilung Anorganische Chemie, Faradayweg 4-6, 14195 Berlin, Germany;1. Department of Energy and Environmental Systems, North Carolina Agricultural and Technical State University, Greensboro, NC, 27411, USA;2. Department of Chemical, Biological and Bioengineering, North Carolina Agricultural and Technical State University Greensboro, NC, 27411, USA;3. Department of Chemistry, North Carolina Agricultural and Technical State University Greensboro, NC 27411 USA;1. LEPABE – Departamento de Engenharia Química, Faculdade de Engenharia da Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal;2. Instituto de Tecnología Química, UPV-CSIC, Avda. de los Naranjos s/n, 46022 Valencia, Spain;1. The Petroleum and Petrochemical College, Chulalongkorn University, Bangkok 10330, Thailand;2. Department of Chemical Engineering, University of Michigan, MI, USA;1. Technische Universität München, Department of Chemistry, Lichtenbergstraße 4, Garching b. München 85748, Germany;2. Technische Universität München, Catalysis Research Center, Ernst-Otto-Fischer-Straße 1, Garching b. München, 85748, Germany;3. Clariant Produkte (Deutschland) GmbH, BU Catalysts, Waldheimer Str. 13, D-83052 Bruckmühl, Germany;4. Department of Inorganic Chemistry, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, Berlin D-14195, Germany;5. Saint Petersburg State University, Research Centre for X-ray Diffraction Studies, Decabristov lane 16, St. Petersburg 199155 Russia;1. Université Lille Nord de France, F-59000 Lille, France;2. Université du Littoral Côte d''Opale, Unité de Chimie Environnementale et Interactions sur le Vivant, E.A. 4492, MREI 1, 59140 Dunkerque, France;3. Conseil National de la Recherche Scientifique Libanais (CNRSL), Liban |
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| Abstract: | Dilution of a commercial Cu/ZnO/Al2O3 (CZA) catalyst by well-crystallized MgAl hydrotalcite nitrate (HTNO3) and chloride (HTCl) resulted in the formation of the modified samples CZA–HTN and CZA–HTCl, respectively. The samples were characterized by N2 sorption and XRD measurements. The structures of the CZA–HT materials proved to be more compact than those of the pristine clays. The modified samples were investigated as catalysts for the steam reforming of methanol under steady state conditions. The catalytic activity and the long-term stability of CZA–HT were found to depend strongly on the nature of the interlamellar anion of HT. CZA–HTN exhibited a marked catalytic activity and an enhanced thermal stability. It was pointed out that dilution with HTNO3 improved the catalytic performance of CZA by increasing the methanol conversion and decreasing the CO production. The moderate increase in the methanol conversion for CZA–HTN during time-on-stream was attributed to partial delamination of the HT structure under SRM conditions. The application of an enhanced H2O:MeOH ratio of 1.3 for CZA–HTN was found to decrease both the methanol conversion and the CO formation to an appreciable extent. |
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