Analysis of inter-particle dilution effects in a catalytic packed bed reactor
| Autor: | Divesh Bhatia, Michael P. Harold, Mayank Tanwar |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Packed bed
Inert Work (thermodynamics) Materials science Particle number General Chemical Engineering Thermodynamics 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Industrial and Manufacturing Engineering 0104 chemical sciences Catalysis Dilution Reaction rate Environmental Chemistry Particle 0210 nano-technology |
| Zdroj: | Chemical Engineering Journal. 337:750-754 |
| ISSN: | 1385-8947 |
| DOI: | 10.1016/j.cej.2017.12.101 |
| Popis: | The widely used Koros-Nowak criterion and Madon-Boudart test which are based on intra-particle dilution effects have been extended by various researchers to study inter-particle dilution effects. In this work, numerical simulations are performed to investigate the inter-particle dilution effects in a packed bed containing catalyst and inert particles. It is shown that if the turnover rate is found to be independent of the inter-particle dilution ratio, it does not necessarily imply that the diffusional limitations are absent, i.e., if the Madon-Boudart test which was originally developed on the basis of intra-particle dilution is used to study inter-particle dilution effects, the results could be error prone. We show that a straight line with a slope of 1 on a log-log scale between the reaction rate and the weight of the catalyst, or a constant turnover rate with respect to catalyst particle number density does not always imply that the diffusional limitations are absent. It is also emphasized that maintaining low conversions does not always ensure the absence of diffusional limitations. |
| Databáze: | OpenAIRE |
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