In the sulfur-based acid production process, how is the conversion rate calculated, and which indicators are closely related to it?
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As the title suggests, can the decrease in conversion rate be determined on-site based on changes in the pressure drop across the catalyst layer? ? Thank you all**!
If the measured pressure drop across a certain bed suddenly decreases, it is possible that the bed has suffered perforation, and in such a case the conversion rate will drop. If a layer of surface-derived powder scabs forms, the thickness and density of these scabs can vary from time to time; as a result, the air flow distribution becomes uneven, and the conversion rate decreases as well. It is best to make a comprehensive judgment by combining other methods; for example, an increase in the temperature of the subsequent bed layer (i.e., a shift towards the end of the reaction) can sometimes indicate a decrease in the conversion rate of that layer.
It is agreed that it is best to make a comprehensive judgment by combining other methods; for instance, a subsequent increase in bed temperature rise (i.e., shift of the reaction to later stages) can sometimes be used to infer a decrease in the conversion rate at a certain layer. Additionally, stage-wise conversion rates can also be determined through measurement.