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Development of a Ru catalyst supported on HY zeolite for the oxidative decomposition of NH3 triggered at room temperature
Affiliation:1. School of Computer Science and Technology, Shandong Technology and Business University, Yantai, 264005, China;2. Department of Mathematics, R. M. K. College of Engineering and Technology, Thiruvallur, Tamilnadu, India;3. Department of Mathematics, Periyar Maniammai Institute of Science & Technology, Thanjavur, Tamilnadu, India;4. School of Science, SVKM''s NMIMS Deemed to be University, Navi Mumbai, 410 210, India;5. Department of Mathematics, Vel Tech Multi Tech Dr. Rangarajan Dr. Sakunthala Engineering College, Aavadi, Thiruvallur, Tamilnadu, India;6. Department of Mathematics, Kalasalingam Academy of Research and Education (Deemed to be University), Krishnankoil, 626126, Srivilliputtur, Tamilnadu, India;7. Department of Mathematics, Dmi St John The Baptist University, 800-Central Africa, Malawi;8. Mathematics Program, Department of Science and Technology, Ranyah University College, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia;9. Mechanical Engineering Department, College of Engineering and Islamic Architecture, Umm Al-Qura University, P. O. Box 5555, Makkah, 21955, Saudi Arabia;10. Department of Mechanical Engineering, Lebanese American University, Kraytem, Beirut, 1102-2801, Lebanon;11. Department of Mathematics and Statistics, Riphah International University I-14, Islamabad, 44000, Pakistan;1. Khristianovich Institute of Theoretical and Applied Mechanics of SB RAS, 630090, Novosibirsk-90, Institutskaya Str. 4/1, Russian Federation;2. Voevodsky Institute of Chemical Kinetics and Combustion of SB RAS, 630090, Novosibirsk-90, Institutskaya Str. 3, Russian Federation;3. Novosibirsk State University, Novosibirsk-90, Pirogov Str. 2, 630090, Russian Federation;1. Department of Physics, University of Agriculture-38040, Faisalabad, Pakistan;2. Department of Chemistry, University of Agriculture-38040, Faisalabad, Pakistan;1. Institute of Advanced Optical Technologies − Thermophysical Properties (AOT-TP), Department of Chemical and Biological Engineering (CBI) and Erlangen Graduate School in Advanced Optical Technologies (SAOT), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Paul-Gordan-Straße 8, 91052 Erlangen, Germany;2. Forschungszentrum Jülich GmbH, Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Cauerstraße 1, 91058 Erlangen, Germany;3. Institute of Chemical Reaction Engineering (CRT), Department of Chemical and Biological Engineering (CBI), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Egerlandstraße 3, 91058 Erlangen, Germany;1. School of Chemistry, University of Tehran, Iran;2. Computational and Bio-Simulation Research Group, University of Calabar, Nigeria;1. Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland;2. Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland
Abstract:On-site hydrogen production from the oxidative decomposition of NH3 with a catalyst is highly required in the countryside where external heat is hardly supplied. In this study, Ru-based zeolite catalysts were prepared by impregnation and subsequent washing using RuCl3·3H2O and HY zeolite or H-MOR zeolite for the oxidative decomposition of NH3. The H-MOR-supported Ru catalyst could not be self-heated by feeding 80% NH3/20% O2 to the catalyst bed at room temperature. By contrast, the HY-supported Ru catalyst underwent self-heating to approximately 773 K upon feeding the reactants owing to the heat released by NH3 adsorption and oxidation, leading to excellent performance for the oxidative decomposition of NH3 during five cycles of start-up tests. Characterization results indicated that the Cl-free Ru/HY catalyst exhibited self-heating due to the presence of small well-dispersed Ru metal particles and a large amount of surface acidic sites.
Keywords:Cl-free Ru/HY zeolite catalyst  Oxidative decomposition of ammonia  Adsorption and oxidation heat  Room temperature  Start-up cycle test
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