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
| Autor: | Heeseon Kim, Soonho Song |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Hydrogen Renewable Energy Sustainability and the Environment Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Combustion 01 natural sciences Methane 0104 chemical sciences Catalysis law.invention Ignition system chemistry.chemical_compound Fuel Technology chemistry Chemical engineering law Fuel efficiency 0210 nano-technology Chemical decomposition Hydrogen production |
| Zdroj: | International Journal of Hydrogen Energy. 45:9353-9367 |
| ISSN: | 0360-3199 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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