Optimization fluidization characteristics conditions of nickel oxide for hydrogen reduction by fluidized bed reactor
| Autor: | Kwan Young Lee, Yong-Ha Kim, Kwang Deuk Kim, Naim Hasolli, Jae Rang Lee, Kang San Lee, Seong Min Jeon, Young Ok Park |
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| Rok vydání: | 2018 |
| Předmět: |
Pressure drop
Materials science Hydrogen Scanning electron microscope General Chemical Engineering Nickel oxide Non-blocking I/O Analytical chemistry chemistry.chemical_element 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Catalysis 020401 chemical engineering chemistry Fluidized bed Fluidization 0204 chemical engineering 0210 nano-technology |
| Zdroj: | Korean Journal of Chemical Engineering. 35:2321-2326 |
| ISSN: | 1975-7220 0256-1115 |
| Popis: | We evaluated the optimal conditions for fluidization of nickel oxide (NiO) and its reduction into high-purity Ni during hydrogen reduction in a laboratory-scale fluidized bed reactor. A comparative study was performed through structural shape analysis using scanning electron microscopy (SEM); variance in pressure drop, minimum fluidization velocity, terminal velocity, reduction rate, and mass loss were assessed at temperatures ranging from 400 to 600 °C and at 20, 40, and 60 min in reaction time. We estimated the sample weight with most active fluidization to be 200 g based on the bed diameter of the fluidized bed reactor and height of the stocked material. The optimal conditions for NiO hydrogen reduction were found to be height of sample H to the internal fluidized bed reactor diameter D was H/D=1, reaction temperature of 550 °C, reaction time of 60 min, superficial gas velocity of 0.011 m/s, and pressure drop of 77 Pa during fluidization. We determined the best operating conditions for the NiO hydrogen reduction process based on these findings. |
| Databáze: | OpenAIRE |
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