The effect of sulfur-containing compounds on Pt/Al2O3-based catalysts
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Many devices use Pt-based catalysts. In dehydrogenation units for low-carbon alkanes (propane, isobutane), the temperature ranges from 525 to 700°C, and the reaction pressure is slightly above atmospheric pressure; hydrogen is used to dilute the feed in order to prevent coking. In this reaction atmosphere, do trace sulfur-containing compounds in the feedstock (less than 10 ppm) have a significant impact on the stability of catalyst activity? To ensure a two-year operational life of the catalyst, to what extent must the concentration of sulfur-containing compounds be reduced? I hope to meet a teacher with similar experience. Thank you!
Effects below 10 ppm should be minimal; it’s also possible to reduce it further, but the cost would be too high
Coking of olefins at high temperatures after dehydrogenation is a problem; sometimes sulfur needs to be added to suppress coking