Promotion effect of different lanthanide doping on Co/Al2O3 catalyst for dry reforming of methane |
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| Affiliation: | 1. State Key Laboratory of Clean and Efficient Coal Utilization, College of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan, 030024, Shanxi, PR China;2. Key Laboratory of Coal Science and Technology, Ministry of Education, Taiyuan University of Technology, Taiyuan, 030024, Shanxi, PR China;3. College of Chemistry, Taiyuan University of Technology, Taiyuan, Shanxi, 030024 PR China;4. National Engineering Laboratory for Multi Flue Gas Pollution Control Technology and Equipment, School of Environment, Tsinghua University, Beijing 100084, China;5. Non-ferrous Metals Development Zone Management Committee, Chifeng, 024400, Inner Mongolia, China;1. Institute of Refrigeration and Cryogenic Engineering, Xi''an Jiaotong University, Xi''an 710049, China;2. China Special Equipment Inspection and Research Institute, Beijing, 100029, China;3. College of Petroleum and Chemical, Lanzhou University of Technology, Lanzhou, 730050, China;1. Department of Metallurgical and Materials Engineering, Nevsehir Haci Bektas Veli University, Nevsehir, 50300, Turkey;2. Department of Metallurgical and Materials Engineering, Eskisehir Osmangazi University, Eskisehir, 26040, Turkey;1. Department of Smart Manufacturing Engineering, Graduate School of Engineering, Changwon National University, 20 Changwondaehak-ro, Uichang-gu, Changwon 51140, Republic of Korea;2. Defense Development Team, Hyundai Wia Corp., 154 Jeongdong-ro, Seongsan-gu, Changwon 51537, Republic of Korea;3. Department of Mechanical Engineering, College of Mechatronics, Changwon National University, 20 Changwondaehak-ro, Uichang-gu, Changwon 51140, Republic of Korea;1. Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, PR China;2. University of Chinese Academy of Sciences, Beijing, 100049, PR China |
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| Abstract: | In this paper, a series of cobalt catalysts modified by different lanthanide metals were synthesized via co-impregnation method using inexpensive industrial-grade alumina as a support for dry reforming of methane. The effect of lanthanide metals as accelerators of cobalt-based catalysts on catalytic performance and anti-coking properties was mainly investigated. The textural relationships between the catalytic performance and physicochemical properties of cobalt-based catalysts doped with different lanthanide metals were further investigated. Different characterization techniques demonstrate the positive effect of lanthanide metals on the physicochemical properties of catalysts. The results show that the electron transfer between cobalt species and lanthanide metal oxides is significantly enhanced due to the introduction of lanthanide elements. The process generates more active sites, which is favorable for the adsorption and activation of methane. In addition, the abundant medium basic sites and oxygen vacancies on the surface of cobalt-based catalysts with the effect of lanthanides promoted the adsorption and activation of carbon dioxide and the gasification of carbon accumulation, which greatly improved the anti-carbon accumulation performance of the catalysts. Therefore, the prepared cobalt-lanthanum-based catalysts showed the best catalytic effect and have great potential for application. |
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| Keywords: | Methane dry reforming Carbon dioxide Catalytic performance Lanthanide Co-based catalyst |
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