What are everyone’s thoughts on diesel hydrogenation (with dewaxing) and the optimization of atmospheric pressure units to reduce the amount of hydrotreated naphtha used?
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The facility does not have an ethylene plant with diesel hydrotreating capabilities (including dewaxing). When producing -35 grade diesel in winter, the yield of naphtha is too high, at around 6-8%; moreover, the sulfur content in the refined naphtha ranges from 100-200 ppm, with significant fluctuations. This results in poor performance of the reforming unit, and the octane number of the feedstock sent to the blending tank (or gasoline hydrotreating unit) is too low, at around 70-75. 1. How can the degree of hydrotreating for dewaxing be reduced in order to lower the naphtha yield? 2. What adjustments can be made under atmospheric pressure? 3. What are the adverse effects on atmospheric-pressure devices? Manager Discussion Group
Operational adjustments were made to the hydrodesulfurization unit; cooling and reduction tests were carried out to further decrease the output of naphtha, while simultaneously adjusting the reaction severity in the hydroprocessing unit； The goal of reducing the production of light naphtha is achieved by lowering the reaction depth in the hydrodesulfurization unit and the hydrorefining unit
Operational adjustments were made to the hydrodesulfurization unit; cooling and reduction tests were carried out to further decrease the output of naphtha, while simultaneously adjusting the reaction severity in the hydroprocessing unit； The goal of reducing the production of light naphtha is achieved by lowering the reaction depth in the hydrodesulfurization unit and the hydrorefining unit
The reformed version should be edible; just adjust the mixing ratio
I really don’t understand this. I’m sorry, I’m still learning*
This needs to be adjusted according to the catalyst loading in your anticoagulation reactor. Typically, hetero-nucleating agents, hydrocracking agents, and refining agents are loaded into the antifreeze reactor. The key to reducing the naphtha yield lies in controlling the temperature of the bed where the hydrocracking agent is located. At lower temperatures, the cracking reaction is relatively weak, resulting in less naphtha yield, but the freezing point decreases to a lesser extent.
Either replace the catalyst, or lower the temperature or modify the feed material
This depends on the properties of your raw materials; if the raw materials are relatively mild in nature, then the temperature for the anti-settling reaction can be kept lower, and less cracking will occur as well. The most fundamental solution still lies in the properties of the catalyst.