How to increase the cetane number of hydrogenated diesel? ? ?
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How can the cetane number of hydrogenated diesel be improved? ? ?
In simple diesel hydrogenation, the improvement in cetane number is due to the hydrogenation and saturation of aromatics in the feed oil, and this improvement is quite limited. In diesel upgrading technology, in addition to the saturation of aromatics, ring-opening reactions can also occur in polycyclic hydrocarbons, resulting in a significantly greater increase in cetane number.
The increase in the cetane number of diesel occurs primarily in hydrocracking units. The sophistication of these units is now sufficient to meet Euro 5 standards, but the processes and catalysts used may need to be more advanced. The elevation of the diesel cetane number is mainly achieved through the saturation of aromatics, a process that takes place under low temperature and high pressure.