Sample interview questions: How do you approach analyzing and troubleshooting issues related to catalyst deactivation or degradation in petrochemical engineering?
Sample answer:
Approach to Catalyst Deactivation and Degradation Analysis and Troubleshooting
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Initial Assessment:
- Review process conditions (temperature, pressure, feed composition) and catalyst characteristics (type, age, preparation).
- Identify potential deactivation mechanisms based on known catalyst aging pathways.
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Physical Characterization:
- Conduct visual inspections for changes in catalyst morphology, color, or texture.
- Utilize techniques such as BET surface area analysis, X-ray diffraction, and SEM to evaluate catalyst surface changes, crystal structure, and pore structure.
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Chemical Characterization:
- Employ X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), or mass spectrometry to identify surface contaminants, reaction products, or degradation products.
- Perform chemical leaching or extraction to quantify metal loss or deposition.
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Activity and Selectivity Testing:
- Conduct bench-scale or pilot-scale tests to determine the catalyst’s residual activity and selectivity.
- Compare results to fresh catalyst performance to assess … Read full answer
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