catalyst
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What are the common phenomena that occur in catalysts over time as they are used? Are there any methods for its regeneration? Can all catalysts be regenerated?
It depends on what kind of catalyst it is; some cannot be regenerated.
Generally, the efficiency of catalysts decreases after multiple uses; some catalysts cannot be regenerated, while others are not cost-effective to regenerate. The method of regeneration must be determined based on specific circumstances.
Taking hydrocracking as an example: as the catalyst ages, the reaction temperature increases, and the distribution of the products at the outlet changes, with an increase in light components； Here I am using external regeneration; during regeneration, the catalyst usually gets burned, and after regeneration its activity still needs to be analyzed. Not all catalysts can be regenerated; for example, the catalysts in residue hydrogenation fixed-bed reactors do not require regeneration.
In the later stages of use, catalysts often exhibit a decline in catalytic activity, which leads to a decrease in the reaction conversion rate. Catalysts generally find it difficult to reach their initial values after regeneration, and the regeneration conditions vary as well. Not all catalysts can be regenerated.
Not all catalysts can be regenerated； For example, desulfurization catalysts cannot be regenerated
This post was last edited by yydyz on 2010-3-3 09:31. As catalysts are used over time, their activity declines and the conversion rate decreases. As long as the microstructure is not damaged, it can be regenerated and reused. But the effectiveness of the regenerator declines.
Activity declines and yield is low; it depends on the catalyst used. In the case of an ammonia synthesis catalyst, CO poisoning can be addressed through high-hydrogen reduction, whereas hydrogen sulfide poisoning cannot be resolved in this way