The use of ferrites as highly active oxygen storage materials for chemical looping hydrogen production under intermediate temperature |
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| Affiliation: | 1. Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing, 210096, PR China;2. School of Fine Art, Baoji University of Arts and Sciences, Baoji, 721013, PR China;3. Department of Mechanical Engineering, Chiang Mai University, Chiang Mai, 50200, Thailand;1. Department of Chemical and Biomolecular Engineering, North Carolina State University, 911 Partners Way, Raleigh, NC 27695-7905, USA;2. College of Chemistry & Chemical Engineering, Northeast Petroleum University, Daqing, Heilongjiang 163318, PR China;1. Hydrogen and Fuel Cell Department, Korea Institute of Energy Research (KIER), 152 Gajeong-ro, Yuseong-gu, Daejeon 305-343, Republic of Korea;2. Department of Chemical and Biomolecular Engineering, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Republic of Korea;3. Clean Fuel Department, Korea Institute of Energy Research (KIER), 152 Gajeong-ro, Yuseong-gu, Daejeon 305-343, Republic of Korea;1. Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, Dalian 116023, China;2. Department of Chemical & Biomolecular Engineering, National University of Singapore, Singapore 117585, Republic of Singapore;3. School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China;4. Laboratory of Alternative Fuels and Environmental Catalysis, Department of Environmental and Pollution Control Engineering, Western Macedonia University of Applied Sciences, Kozani 50100, Greece;1. School of Environment and Resource, Southwest University of Science and Technology, Mianyang, 621020, PR China;2. Sichuan College of Architectural Technology, Deyang, 618000, PR China;3. Mianyang Teacher''s College, Mianyang, 621000, PR China;4. Fundamental Science on Nuclear Wastes and Environment Safety Laboratory, Southwest University of Science and Technology, Mianyang, 621020, PR China;5. National Co-Innovation Center for Nuclear Waste Disposal and Environmental Safety, Southwest University of Science and Technology, Mianyang, 621010, China;6. School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, PR China;7. College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong 518060, China |
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| Abstract: | Shifting chemical looping from high temperatures to intermediate temperatures could mitigate the materials from sintering and benefit for longer durability as well as process economy. However, oxygen carriers cannot perform sufficiently due to the degrading effect at lower temperatures, resulting in the decrease of hydrogen production ability. Although doping precious metals can improve the poor performance at intermediate temperatures, the high cost impeded their large-scale application. In this paper, a range of oxygen carrier materials consisted of earth abundant elements were prepared for chemical looping hydrogen production. The results indicated that CoFe2O4 exhibited the highest hydrogen yield of 11.9 mmol·g−1 and hydrogen production rate of 0.051 mmol g−1·s−1 at 650 °C, which was 1.7 times higher than that of Fe2O3. A combined experimental and DFT calculation method was used to understand the mechanism behind the performance. The results indicated that the synergistic effect between Co and Fe increased the reactivity of the ferrite materials. The enhanced hydrogen production performance was attributed to the high reduction degree and reversible phase change. This study can be also extended to develop more active oxygen carrier for chemical looping processes at intermediate temperatures. |
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| Keywords: | Ferrite materials Oxygen carrier Chemical looping Hydrogen production |
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