The results revealed that the multicomponent catalysts exhibited superior activity compared to the metal oxide catalysts containing only one metal oxide. When considering the catalytic activity of tetravalent metal centers (Zr, Hf and Ti) substituted into NU-1000 it is found that their activity decreases in the order Hf ≥ Zr > Ti, based on activation energies and turnover frequencies (TOF). the whole article in a third party publication with the exception of reproduction 3 publications. "Reproduced from" can be substituted with "Adapted from". * The best catalytic results were achieved for Zr-La/SBA-15-HT indicating values of ethanol conversion and ethylene yield of ca. The SBA-15 support was incorporated on a zirconium (Zr) and bimetal of zirconium and lanthanum (Zr-La) prepared by sol-gel (SG) and hydrothermal (HT) methods. The copper-modified Mg-Al catalyst (Cu/Mg-Al) was synthesized using the incipient wetness impregnation of copper onto the Mg-Al hydrotalcite derived from co-precipitation method. The supported NU-1000 framework plays also important role since it facilitates electron transfers and stabilizes all species along the reaction coordinate. of the whole article in a thesis or dissertation. Extensive research from ethanol dehydrogenation has already been performed in 1951 by Church et al. The catalytic performance of these catalysts was shown for the first time to largely depend on the dehydrogenation, hydrogenation and CC bond cracking capabilities of each individual supported metal. The model was fit to our data using four fitting parameters. International Journal of Quantum Chemistry. If you like, you could write, for example, "conc H2SO4" over the top of the arrow. You do not have JavaScript enabled. contained in this article in third party publications 10%. Go to our it in a third party non-RSC publication you must BD production data at low WHSV, catalyst deactivation data and procedures for correction for deactivation; N2 physisorption data; X-ray diffraction data; preliminary operando FTIR spectroscopy data (PDF). The carbon content and shell thickness are controlled by changing the calcination time. Les paramètres cinétiques ont été estimés via un optimiseur Levenberg Marquardt à partir de la base de données expérimentale. The non-oxidative dehydrogenation of ethanol to acetaldehyde and hydrogen is an industrially relevant chemical conversion. The temperature is regulated to 270-300 °C so that the ethanol conversion is limited to 30-50%. Ethanol conversion and ethylene selectivity were found to increase with increased reaction temperature. This article is cited by However, at temperature from 350 to 400°C, the effect of Ru and Pt was less pronounced on ethylene yield. at TOS = 164 h and T = 150 °C. The present work deals with the catalytic performance of SBA-15 supported catalysts in the gas phase catalytic dehydration of ethanol in the temperature range of 200 to 400°C. If you are not the author of this article and you wish to reproduce material from Research Network NANOTEC-Kasetsart on NanoCatalysts and NanoMaterials for Sustainable Energy and Environment: RNN-CMSEE and Center for Advanced Studies in Nanotechnology for Chemical, Food and Agricultural Industries, Kasetsart University, Bangkok 10900, Thailand, c In the proposed mechanism, the activation barrier of the rate-determining step is almost four times lower in the presence of N2O than without it. to access the full features of the site or access our. The purpose of this work was to investigate biomass-derived ethanol dehydrogenation into acetaldehyde using several mono- and multicomponent (CuO, ZnO and Cr2O3)-containing catalysts supported on industrial size Al2O3 beads. The improvement in the long-term stability of the catalysts is attributed to the stabilization of Cu against sintering. without permission from the American Chemical Society. McKetta Department of Chemical Engineering and Department of Chemistry, Center for Nano and Molecular Science and Technology, Texas Materials Institute, Center for Electrochemistry, and Institute for Computational Engineering and Sciences, University of Texas at Austin, Austin, Texas 78712-0231, USA Institute of Ion Physics and Applied Physics, University of Innsbruck, 6020 Innsbruck, Austria. The ethanol conversion and the carbon selectivity to the primary compounds were investigated during time on stream in order to study the stability and regenerability of supported catalysts. The temperature is regulated to 270-300 °C so that the ethanol conversion is limited to 30-50%. For reproduction of material from all other RSC journals and books: For reproduction of material from all other RSC journals. It revealed that Ru and Pt were present in the highly dispersed forms and well distributed in the catalyst granules. Bioethanol is one of such biomass-derived platform solvents with a potential to be used as a fuel and a sustainable feedstock of a variety of chemicals. In the low temperature region (150 °C), the most active catalyst was the V/TiO2 which presented stable activity in the production of acetaldehyde up to TOS = 200 h. On the contrary, in the high temperature region (250 °C), the most active catalyst was the V/Al2O3catalyst. contained in this article in third party publications A selectivity to of 90-95 % is attained. from the ACS website, either in whole or in part, in either machine-readable form or any other form Our theoretical results show that the synergistic influence of atomic ensemble and electronic effects on Pd/Au(111) can lead to different H2 association energies and EtOH dehydrogenation capacities at different Pd ensembles. Under these conditions, the catalysts are stable for more than 12 h using an aqueous solution of 10 % ethanol as feed. The rates of both acetaldehyde and ethylene were inhibited by pyridine but not by 2,6-ditertbutylpyridine, suggesting that both reactions involve not only basic but also Lewis acidic sites. It was found that the W/TiO2-P25 catalyst revealed higher activity among other catalysts. Information about how to use the RightsLink permission system can be found at With various characterization techniques, the effects of Ru and Pt modification on HBZ catalyst were elucidated. In addition, the most selective catalyst towards acetaldehyde formation, with 50% selectivity at 55% conversion of ethanol at 300 °C and WHSV 1 h−1 was CuOCr2O3/Al2O3 prepared by using the solution combustion method, indicating that this inexpensive and rapid catalyst preparation method is promising for other applications. Article Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. Department of Chemistry, Faculty of Liberal Arts and Science, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom 73140, Thailand By continuing you agree to the use of cookies. Supporting Information Also, hydrotalcite was tested for the first time for this type of reaction providing a conversion lower than 7%wt. ScienceDirect ® is a registered trademark of Elsevier B.V. ScienceDirect ® is a registered trademark of Elsevier B.V. The dehydrogenation of ethane to ethylene in the presence of oxygen and water was conducted using Na 2 WO 4 /SiO 2 catalyst at high temperatures. If you are the author of this article you still need to obtain permission to reproduce Authors contributing to RSC publications (journal articles, books or book chapters) Crossref. One frequently applied process originates from the Carbide & Corporation. The Au(111) surface with an initial coverage of 2 monolayers of Pd (2 ML Pd–Au) had the highest H2 yield. Department of Chemical and Biomedical Engineering, Forest Bioproducts Research Institute, University of Maine, Orono, Maine 04469, United States, Department of Chemistry, Frontier Institute for Research in Sensor Technology, University of Maine, Orono, Maine 04469, United States, Department of Chemistry, Forest Bioproducts Research Institute, Frontier Institute for Research in Sensor Technology, University of Maine, Orono, Maine 04469, United States, Department of Chemical and Biomedical Engineering, Forest Bioproducts Research Institute, Frontier Institute for Research in Sensor Technology, University of Maine, Orono, Maine 04469, United States, Reaction Kinetics Analysis of Ethanol Dehydrogenation Catalyzed by MgO–SiO. P. I. Kyriienko, O. V. Larina, S. O. Soloviev, S. M. Orlyk. ScienceDirect ® is a registered trademark of Elsevier B.V. ScienceDirect ® is a registered trademark of Elsevier B.V. Information about reproducing material from RSC articles with different licences The W/TiO2-P25 and W/TiO2-A catalysts render the ethylene yield of 60.3% and 46.2%, respectively, whereas only 15.9% is obtained from W/TiO2-R catalyst.

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