Catalyst feedstock: What is the relationship between density and carbon residue?
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As the title suggests: In catalytic feedstocks, what is the relationship between density and residue? What is their relationship with coke yield? Our test analyses often show a high density but a low residue carbon content; how should we interpret this situation?
Crude oil of the same type that yields catalytic feedstock with a high carbon residue generally has a higher specific gravity； Catalytic feedstocks derived from different types of crude oil, such as paraffin-based ones, have a higher slag inclusion ratio and higher residual carbon content; however, their specific gravity is actually lower than that of naphthenic-based feedstocks, contrary to what might be expected. Naphthenic crude oil-derived catalytic feedstocks require less slag inclusion, or in some cases, no slag at all ； There is no simple linear relationship between residual carbon and the density of the raw material
Reply to 2# linweihua6: Which has a greater impact on coke yield, density or residual carbon?
Coking in the regenerator refers to the carbonization of carbon; during the reaction process, the residual carbon is essentially converted into coke and burned off. Raw materials with a higher density, such as those containing more aromatic and naphthenic components, are more difficult to react with, so measures such as increasing the degree of reprocessing are taken to enhance the depth of the reaction. An increased reaction depth leads to the formation of coke. Generally, the higher the density of a raw material, the more coke it produces. During the production process, raw materials with a higher density generate less coke compared to those with lower density. High residual carbon levels (for example, 5%) further increase coke production. There is no absolute consistency in the way density and residual carbon affect coke production
Are there any papers and data to support this?