The issue of the difference between the regenerator and the raw catalyst carbon
Thread Content
What does the difference between the regenerator and the raw catalyst carbon indicate? What are the effects of a difference that is too large or too small?
It explains the charring effect – are there any questions about this? The charring effect is good, with low carbon fixation in the regenerated material and more raw coke; the carbon fixation in the unprocessed material is high. Of course, it’s also possible that this is due to an excessively low oil-to-agent ratio.
A high oil ratio can reduce carbon defects and increase the number of active centers. How should this sentence be understood?
After thinking it over, the carbon difference you mentioned is the carbon difference in carbon balance, so it’s not the same concept. The carbon difference is the amount of coke carried per unit mass of catalyst as it changes from a regenerated catalyst to a raw catalyst. Therefore, it can be concluded that the oil-to-agent ratio multiplied by the carbon difference equals the amount of coke produced per unit mass of feedstock. Based on this formula, it can be seen that if the oil-to-agent ratio is too high, the carbon difference will be too small; however, due to the high conversion rate, the coke yield increases, and thus energy consumption inevitably rises. If the oil-to-agent ratio is too low, the carbon difference becomes excessive; as a result, the conversion rate drops and the yield of light liquids decreases. So, I understand that an appropriate carbon difference corresponds to an appropriate oil-to-agent ratio.
There’s not much to explain about the active centers – the more catalysts there are, the more active centers there are as well.