Concept design of a novel reformer producing hydrogen for internal combustion engines using fuel decomposition method: Performance evaluation of coated monolith suitable for on-board applications |
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| Affiliation: | 1. The Graduate School, Department of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea;2. Department of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea;1. School of Physics and Technology, Center for Ion Beam Application, Hubei Key Laboratory of Nuclear Solid Physics, Wuhan University, Wuhan, 430072, China;2. International Research Center for Renewable Energy and State Key Laboratory of Multiphase Flow in Power Engineering, Xi''an Jiaotong University, Shanxi, 710049, China;1. School of Materials and Energy, Southwest University, Chongqing, 400715, PR China;2. College of Architecture and Environment, Sichuan University, Chengdu, 610065, PR China;3. China Academy of Engineering Physics, Mianyang, 621900, PR China;1. Boreskov Institute of Catalysis, Pr. Akademika Lavrentieva, 5, Novosibirsk 630090, Russia;2. Novosibirsk State University, Pirogova St., 2, Novosibirsk 630090, Russia;1. School of Materials Science and Engineering and Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, South China University of Technology, Guangzhou 510641, China;2. China-Australia Joint Laboratory for Energy & Environmental Materials, South China University of Technology, Guangzhou 510641, China;3. Guangdong Research Institution of Rare Metals, Guangzhou 510650, China;1. School of Chemical and Biological Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea;2. School of Chemical Engineering and Material Science, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Republic of Korea;3. School of Chemical and Biological Engineering, Institute of Chemical Process, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea;1. Key Laboratory of Aircraft Environment Control and Life Support, Ministry of Industry and Information Technology, Nanjing University of Aeronautics & Astronautics, China;2. AVIC Jincheng Nanjing Engineering Institute of Aircraft System, Nanjing, China |
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| Abstract: | Hydrogen addition effectively reduces the fuel consumption of spark ignition engines. We propose a new on-board reformer that produces hydrogen at high concentrations and enables multi-mode operations. For the proposed reformer, we employ a catalytic fuel decomposition reaction via a commercial NiO–CaAl2O4 catalyst. We explore the physical and chemical aspects of the reforming process using a fixed bed micro-reactor operating at temperatures of 550–700 °C. During reduction, methane is decomposed to form hydrogen and carbon. Carbon formation is critical to hydrogen production, and free space for carbon growth is essential at low temperatures (≤600 °C). We define a new accumulated conversion ratio that quantitatively measures highly transient catalytic decomposition. The free space of the coated monolith clearly aided low-temperature decomposition with negligible pressure drop. The coated substrate is therefore suitable for on-board applications considering that our reformer concept also utilizes the catalytic fuel decomposition reaction. |
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| Keywords: | Catalytic fuel decomposition Coated monolith Hydrogen production Internal combustion engine On-board reformer |
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