Improved catalytic stability and anti-coking ability of Ni/La2O3–Al2O3 catalyst by doping alkaline earth metals for n-decane reforming |
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| Affiliation: | 1. College of Oil and Natural Gas Engineering, State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, 610500, Sichuan, China;2. Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu, 610064, Sichuan, China;1. Department of Applied Chemistry, College of Science, Northeast Agricultural University, Harbin, Heilongjiang, 150030, PR China;2. College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin 150040, PR China;1. School of Materials Science and Engineering, Inner Mongolia University of Technology, Hohhot, 010051, PR China;2. Key Laboratory at Universities for Materials Processing & Control Engineering of Inner Mongolia Autonomous Region, Hohhot, 010051, PR China;1. School of Mechanical Engineering and Automation, Harbin Institute of Technology, Shenzhen, Guangdong, 518055, People’s Republic of China;2. School of Energy Science and Engineering, Harbin Institute of Technology, Key Laboratory of Aerospace Thermophysics, MIIT, Harbin, 150001, People’s Republic of China;1. Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China;2. Collaborative Innovation Center of Chemical Science and Engineering(Tianjin), Tianjin, 300072, China |
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| Abstract: | In this paper, a series of alkaline earth metals oxides doped Ni/La2O3–Al2O3 catalysts were synthesized by the coprecipitation method combined with two step impregnation methods. n-decane reforming was used to investigate these catalysts, in order to develop an excellent catalyst with better hydrogen selectivity, activity, stability, as well as lower carbon deposition. Deactivation by carbon deposition, the catalyst regenerability and stability tests were also used to weigh the selected catalyst. These catalysts are characterized by N2 adsorption-desorption, XRD, NH3-TPD, Raman, and TEM. The introduction of alkaline earth metals modifiers enhances the activity, stability and anti-coking ability, meanwhile the SrO modified Ni/La2O3–Al2O3 shows the best catalytic activity. Moreover, the hydrogen selectivity and conversion over regenerative Ni/La2O3–Al2O3/SrO catalysts were quite close to the results of fresh ones. The enhancements of M oxides doped catalysts (especially Sr) can be due to the improved textural properties, basicity, metal-support interaction and anti-coking ability. As a consequence, loading different metals in different ways helps to gradually improve the stability, activity and coking inhibition of catalysts is an effective approach to obtain a multi-function catalyst. |
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| Keywords: | Steam reforming N-decane Anti-coking Thermal stability Regeneration |
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