95% distillation range of hydrogenated diesel
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Hydrogenation diesel feedstocks: 95% distillation range coke fuel at 363°C, normal diesel at 372°C, catalyzed diesel at 371°C; after hydrogenation, the temperature of the hydrogenated diesel is only 346°C, with repeated measurements showing values between 345–352°C. What’s the explanation? Why has the boiling range decreased so much after hydrogenation?
This is easy to understand. Catalytic diesel is diesel obtained through secondary processing of wax oil; it contains high levels of heavy components as well as sulfur and nitrogen. Deep hydrogenation processing can break down some of these heavy components in the diesel, removing elements such as sulfur and nitrogen, which naturally results in a lighter product
By looking at the 95% distillation range of these three crude oils, it can be determined that they contain a high amount of polycyclic aromatics; after hydrogenation, these aromatics are broken down, which results in a shorter distillation range for the hydrogenated oil. If possible, please provide the specific gravity of your feed oil as well as the temperatures of each bed section in the hydrogenation reactor.
Where there is hydrogenation, there is also cracking; it’s not possible to have merely hydrogenation for desulfurization, denitration, deoxygenation, and demetallization – there are also reactions such as the saturation of unsaturated hydrocarbons, ring opening, and chain scission. Regardless of the difficulty level of the reaction, any reaction that meets all four requirements will occur, and it happens simultaneously; there is no situation where lighter components react first. So it’s not strange that heavier components react more easily