On the storage loss issue of mixed aromatics
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Dear everyone: Mixed aromatics are not clearly defined; they can be considered chemical products, but they are actually used in petroleum products, which means that the quantities are calculated based on the volume of petroleum products. Recent storage observations have shown that the goods suffer significant damage due to temperature changes. The current daily temperature difference is around 10 degrees, which is not considered very large; therefore, it should have little impact on both normal respiration and cellular respiration. However, re-sampling to analyze density and other properties revealed no significant changes. I would like to ask the experts: could it be that the presence of components such as xylene, along with mixed ingredients, leads to an illusion of shortages during measurement? Or is there some other reason?
Is it decreasing continuously, or does it fluctuate? If it keeps decreasing, you should check whether there is a leak inside the valve or at the bottom of the tank.
Mixed aromatic hydrocarbons, as a type of medium, contain a large amount of light components, and the product is highly volatile; therefore, significant volatilization occurs during operations that involve large-scale breathing in of air, such as during loading processes, and effective measures must be taken to control this phenomenon； The minor losses due to normal storage are also relatively high compared to those in gasoline and diesel; these can be compared through daily inventory checks. Efforts should be made to prevent the float level from dropping too low. If the losses are excessive, possible causes include oil mixing, measurement errors, or damaged floats. Generally, under operating conditions, the monthly loss is within 3‰, while when not in operation it is within 1.5‰. For reference only.