Abstract
Batch coking reaction experiments of Qingdao vacuum residues were carried out in the temperature range of 420–480 °C and at reaction times in the range of 5–90 min. A four lump kinetic model was developed for delayed coking process of Qingdao vacuum residues. The feedstock and products were considered as a unique and three separated lumps, respectively, in the model. The product lumps were included gas (C1~C4), distillate (C5+~500 °C) and coke (toluene insoluble and 500+ °C). Reactions were assumed in first order and based on Arrhenius reaction rates. The kinetic model was developed to predict unconverted feed values and product yields. The results showed a very good agreement between the experimental yield and predicted yield of different pseudocuts was obtained.
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