Does oil and gas recovery need to be considered when loading light cycle oil?
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First, let’s give a brief introduction to light cycle oil. Light cycle oil is a type of light oil, abbreviated as LCO in English. It is produced as a by-product of catalytic cracking (FCC) processes and constitutes an intermediate product in crude oil production. It can be used as fuel for large machinery, mines, ships, etc., and holds a crucial position in the domestic ship fuel market in China at present ； Light cycle oil is a type of diesel base oil that can be processed into diesel through processes such as hydrodesulfurization, and is used to blend with diesel. In terms of specifications, compared to diesel: indicators such as sulfur content, density, and carbon residue are slightly higher, while the cetane number is lower; the total aromatic content exceeds 50% (only other similar products in which the weight of aromatic components exceeds that of non-aromatic components are classified as light cycle oils). It can be used directly in the main and auxiliary engines of high-power fishing boats and cargo ships, and it can also be used to blend with grade 0 ordinary diesel. Then, should a oil and vapor recovery system be considered for the loading system of light cycle oil? In accordance with the provisions of the \"Technical Standards for Oil and Gas Recovery Facilities\" (GB/T 50759-2022), oil and gas recovery facilities shall be installed in the loading systems for volatile flammable liquid materials. The term in bold is defined as: flammable liquid materials whose actual vapor pressure at the corresponding temperature during storage or loading is greater than 7.9 kPa. The problem is that it’s difficult to find online the actual vapor pressure of light cycle oil at operating temperature (or room temperature). . . So, are there any other ways to determine it? I hope the teachers will kindly offer their guidance.
The loading system for light cycle oil requires consideration of installing an oil and vapor recovery system. Since light cycle oil is a volatile flammable liquid, oil vapor is generated during loading. In accordance with relevant standards and requirements for safety and environmental protection, appropriate oil vapor recovery systems must be installed. If the actual vapor pressure of light cycle oil cannot be obtained directly, data for similar materials can be consulted, or judgments can be made using safety documents such as Material Safety Data Sheets (MSDS). At the same time, it is also possible to consult professional institutions or conduct experimental measurements. .
Listen to the opinions of the local environmental supervision authorities; theoretically, during the loading process of light cycle oil, volatile gases are released, which can be considered VOCs.
It is possible to learn about and refer to the practices of gas stations.