What does catalytic re-refining ratio mean?
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This post was last edited by lijianhuai on 2011-5-12 at 10:55. What does the catalytic reprocessing ratio mean?
The reprocessing ratio is the ratio of the amount of reprocessed oil to the amount of fresh feedstock.
The reprocessing ratio is the ratio of the amount of reprocessed oil to the amount of fresh feedstock. The main purpose of reprocessing is to increase the yield of the catalytically produced product and improve efficiency. However, it is widely agreed that re-refining oil is difficult to crack. Moreover, it affects the processing capacity of the device and increases coking. If the refinery has equipment for processing recycled oil, it is possible to use less recycled oil or none at all. Another advantage of reprocessing oil is that when the feed pump runs out of fluid, the amount of reprocessed oil can be increased immediately, which reduces the adverse effects on the reaction process and provides a buffer time to deal with the issue with the feed pump. We are short of raw materials for the equipment, with a reprocessing ratio of 0.4.
Reply to 1# Discussion: The reprocessing ratio refers to the ratio of the amount of oil that is reprocessed to the amount of fresh feedstock. 1. Industrial plants often use reprocessing operations to improve the product distribution and increase the yield of light oils； 2. Recycled oil contains a high amount of aromatics, making it difficult to crack; thus, more stringent reaction conditions are required ； 3. The size of the reprocessing ratio should be determined based on the properties of the raw materials and the product specifications. When using the gasoline scheme, a lower reprocessing ratio can be selected ； When producing diesel as well needs to be taken into account, a higher reprocessing ratio can be chosen ； 4. The reprocessing ratio is generally less than 1.
The reprocessing ratio is expressed as the ratio of the mass flow rate of the reprocessed oil products (typically including reprocessed oil and reprocessed slurry) to the mass flow rate of the fresh feedstock to the plant. An increase in the reprocessing ratio reduces the processing capacity of the unit and the overall conversion rate, but it increases the yield of light oil products.
The reprocessing ratio is the ratio of the amount of oil reprocessed to the amount of fresh feedstock. Its purpose is to increase the yield of the product; generally, each processing unit has an appropriate reprocessing ratio.
That’s right; for small and medium-sized refineries, reprocessed oil is still very important. When there is no raw material available, almost all of the feedstock we use is reprocessed oil and oil slurry
That’s right; for small and medium-sized refineries, reprocessed oil is still very important. When there is no raw material available, almost all of the feedstock we use is reprocessed oil and oil slurry
The reprocessing ratio is defined as (reprocessed oil + reprocessed slurry) / amount of fresh feed, and can also be expressed as total conversion rate / one-pass conversion rate – 1. Note that the slurry in the molecule is connected back, not discharged outward. The purpose of reprocessing is to increase the yield of light oils. With a constant overall conversion rate, as the one-pass conversion rate decreases – meaning that the reaction is not as thorough – the diesel yield increases, and consequently the recycle ratio rises. Total conversion rate = (Gas + Gasoline + Coke) / Total feed. One-pass conversion rate = (Gas + Gasoline + Coke) / Fresh feed. The total feed includes fresh feed, reprocessed oil, and reprocessed oil slurry.