Feed specifications for diesel hydrogenation unit
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What are the feed specifications for a diesel hydrogenation unit? The 400,000 tons per year diesel hydrogenation unit faces a shortage of raw materials; what key parameters need to be controlled if other raw materials are used for processing? Also, could the experts share what kinds of raw materials are suitable for diesel hydrogenation? The composition of the diesel hydrogenation feedstock at your company.
Pay attention to ensuring that the sulfur and nitrogen contents do not exceed the specified limits, as well as the chloride ion content, dry point, ash and residue contents, and metal ion contents; for specific details, it is necessary to consult the research institute.
The feed to the originally designed diesel hydrogenation unit included； There is vacuum distillation diesel, catalytic diesel, coker diesel, and coker naphtha. Now that the amount of straight-distilled diesel available is insufficient, do any of you have raw materials suitable for diesel hydrogenation? Please give your advice
The raw materials you mentioned are quite comprehensive; in addition, it’s also necessary to control the distillation range and density of diesel.
I’m referring to the scope of control – it’s not as simple as just controlling alkaline nitrogen; how much alkaline nitrogen needs to be controlled in diesel hydrogenation?
Your company likely didn’t start operations all at once; it initially had units for atmospheric and vacuum distillation as well as coking and catalysis, and only later, when there was more money available, were units for diesel and gasoline hydrogenation added. As a result, the volume of material processed at the input end is low, while the volume processed at the output end is high; furthermore, the workshops downstream don’t have enough material to work with. Diesel hydrogenation generally involves mixed feedstocks, including catalyzed naphtha and coked naphtha. Coking gasoline, atmospheric and vacuum distillate gasoline – processing, sulfur content, nitrogen content, gum content; the value should be below 85. The final product’s value ought not to exceed 85 either, as high values make it difficult to adjust the oil in the storage tanks. The gum content should not be too high, as it has a significant impact on backwashing processes and the reactors. As for which type of oil to purchase, it depends on what type is most cost-effective to process on the market; it is also possible to outsource the processing of semi-finished products to other companies.
Our plant also sends its atmospheric gasoline to diesel hydrogenation, while the resulting naphtha is used in naphtha aromatization- -