Fixed-bed reactors for exothermic reactions: A qualitative relation between start-up time and traveling waves velocity
| Autor: | Marco J. Castaldi, Yegor Nikitin, Frederic Marias, Tasnuva Moutushi, Michael Lugo-Pimentel, Axel Fache |
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| Rok vydání: | 2021 |
| Předmět: |
Physics
Exothermic reaction Linear function (calculus) Fixed bed Applied Mathematics General Chemical Engineering Front (oceanography) 02 engineering and technology General Chemistry Function (mathematics) Mechanics 021001 nanoscience & nanotechnology Industrial and Manufacturing Engineering Setpoint 020401 chemical engineering Methanation Upstream (networking) 0204 chemical engineering 0210 nano-technology |
| Zdroj: | Chemical Engineering Science. 235:116504 |
| ISSN: | 0009-2509 |
| Popis: | An experimental investigation of the reaction front movements upon reacting gas injection in a pre-heated non-adiabatic fixed-bed methanation reactor is conducted. The relocation starts with a backward movement of the front, whose maximal velocity turns out to be a linear function of the temperature setpoint. The front then moves forward in response to the fact that the injected cold gas cools down the bed in the upstream zone. The front stabilizes asymptotically in the downstream (upstream, resp.) zone of the reactor after a characteristic time that is an increasing (decreasing, resp.) function of the temperature setpoint, if the setpoint is below (above, resp.) a certain threshold. This behavior is interpreted in terms of reaction wave velocity. |
| Databáze: | OpenAIRE |
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