Ammonia synthesis on magnesia supported ruthenium catalysts with mesoporous structure |
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| Affiliation: | 1. Honda R&D Co., Ltd., Tochigi Research Center, 4630 Shimotakanezawa, Haga-machi, Haga-gun, Tochigi 321-3393, Japan;2. Center for Advanced Science and Innovation, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan;1. KAUST Catalysis Center and Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia;2. King Abdullah University of Science and Technology (KAUST), Core Labs, Thuwal 23955-6900, Saudi Arabia;3. Department of Physics, Khalifa University, Abu Dhabi, United Arab Emirates;4. SABIC Corporate Research and Development Center at KAUST, Saudi Basic Industries Corporation, Thuwal 23955, Saudi Arabia;1. Center for Biorefining, And Department of Bioproducts and Biosystems Engineering, University of Minnesota Twin Cities, St. Paul, MN 55108, USA;2. The Harbin Institute of Technology, Haerbin Shi, Heilongjiang Sheng, 150001, China;3. MOE Biomass Engineering Research Center, Nanchang University, Jiangxi, 330047, China;1. Institute of Industry Catalysis, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, China;2. Sichuan Huadi Construction Engineering Co., Ltd., Chengdu 610081, Sichuan, China;1. National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou, Fujian 350002, China;2. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | Mesoporous Ru/MgO catalysts for ammonia synthesis were prepared by sol–gel method with concurrently decomposing Ru carbonyl complex. The catalytic properties were characterized mainly by means of nitrogen adsorption isotherm, hydrogen chemisorption, X-ray diffraction, and transmission electron microscopy. The detailed observation of decarbonylation behavior on the catalysts prepared under various conditions revealed that the carbonyl complex acted as an effervescent reagent to form a mesoporous structure with radius of 1–9 nm on MgO support. Furthermore, both specific surface area and metal dispersion tended to increase with increasing the Ru carbonyl complex concentration. The best ammonia formation rate was consequently observed on the Ru/MgO catalyst (Ru: 7.1 wt%) with high surface area (290 m2/g) of this series. |
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