Predicting Catalyst Extrudate Breakage Based on the Modulus of Rupture
| Autor: | Theodore E. Datz, Cunningham Majosefina, Natalie A. Fassbender, Jean W. Beeckman, Mazzaro Dana L |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
General Chemical Engineering Mechanical Phenomena 02 engineering and technology Die swell Catalysis General Biochemistry Genetics and Molecular Biology Stress (mechanics) Engineering Issue 135 020401 chemical engineering Flexural strength Breakage Materials Testing 0204 chemical engineering Composite material Length to diameter ratio Rupture modulus of rupture General Immunology and Microbiology General Neuroscience 021001 nanoscience & nanotechnology Aspect ratio (image) optical diameter impulsive force flexural strength stress in a fixed bed aspect ratio Impact 0210 nano-technology |
| Zdroj: | Journal of Visualized Experiments : JoVE |
| ISSN: | 1940-087X |
| DOI: | 10.3791/57163 |
| Popis: | The mechanical strength of extruded catalysts and their natural or forced breakage by either collision against a surface or by a compressive load in a fixed bed are important phenomena in catalyst technology. The mechanical strength of the catalyst is measured here by its bending strength or flexural strength. This technique is relatively new from the perspective of applying it to commercial catalysts of typical sizes used in the industry. Catalyst breakage by collision against a surface is measured after a fall of the extrudates through the ambient air in a vertical pipe. Quantifying the impact force is done theoretically by applying Newton's second law. Measurement of catalyst breakage due to stress in a fixed bed is done following the standard procedure of the bulk crush strength test. Novel here is the focus on measuring the reduction in the length to diameter ratio of the extrudates as a function of the stress. |
| Databáze: | OpenAIRE |
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