Correlations to Predict Coking Yields

Lieberman (1986) proposed several rules of thumb for calculating product yields in delayed coking. For instance  

Apart from these rules of thumb, various correlations have been reported in the literature to calculate the yields, API gravity, and snlfur content of the products of delayed coking. Most of them only use the CCR content of the feed, while only a few incorporate the effect of pressure and temperature. The correlations have been developed using a wide range of type of feeds, whose properties can be found in the respective literature. Due to the empirical nature of correlafions, applying them beyond the range of feed properties, operating conditions, and product yields from which they were derived is risky, and the calculated values should be taken only as approximate estimates. 

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