A comparative study of Ni catalysts supported on Al2O3, MgO–CaO–Al2O3 and La2O3–Al2O3 for the dry reforming of ethane |
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| Affiliation: | 1. Laboratory of Alternative Fuels and Environmental Catalysis (LAFEC), Department of Chemical Engineering, University of Western Macedonia, GR-50100, Greece;2. Department of Chemical Engineering and Environmental Technology, Universidad de Zaragoza, Campus Río Ebro-Edificio I+D, 50018, Zaragoza, Spain;3. Instituto de Nanociencia y Materiales de Aragón (INMA), Universidad de Zaragoza- CSIC, C/ María de Luna 3, 50018, Zaragoza, Spain;4. Networking Research Center on Bioengineering, Biomaterials and Nanomedicine, CIBERBBN, 28029, Madrid, Spain;5. Department of Mechanical Engineering, Khalifa University of Science and Technology, Abu Dhabi, P.O. Box 127788, United Arab Emirates;6. Center for Catalysis and Separations, Khalifa University of Science and Technology, Abu Dhabi, P.O. Box 127788, United Arab Emirates;7. The Surface Analysis Laboratory, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford, GU2 4DL, UK |
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| Abstract: | CO2 utilization through the activation of ethane, the second largest component of natural and shale gas, to produce syngas, has garnered significant attention in recent years. This work provides a comparative study of Ni catalysts supported on alumina, alumina modified with CaO and MgO, as well as alumina modified with La2O3 for the reaction of dry ethane reforming. The calcined, reduced and spent catalysts were characterized employing XRD, N2 physisorption, H2-TPR, CO2-TPD, TEM, XPS and TPO. The modification of the alumina support with alkaline earth oxides (MgO and CaO) and lanthanide oxides (La2O3), as promoters, is found to improve the dispersion of Ni, enhance the catalyst's basicity and metal-support interaction, as well as influence the nature of carbon deposition. The Ni catalyst supported on modified alumina with La2O3 exhibits a relatively stable syngas yield during 8 h of operation, while H2 and CO yields decrease substantially for Ni/Al2O3. |
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| Keywords: | Dry ethane reforming Ni catalysts Basic/lanthanide promoters Modified alumina Carbon deposition |
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