May I ask the process engineers at the gasoline hydrogenation unit: what does the naphtha component mean? ? ?
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May I ask the operators of gasoline hydrogenation units: what does it mean when the naphtha composition varies? ? ? Does the hydrogen-to-oil ratio need to be adjusted depending on the composition of the naphtha? Since the sulfur content in the naphtha fed into the production unit varies from time to time, is the operation still carried out according to uniform standards? There is also a table of naphtha components; for example, PC24C corresponds to 21.8w%, and there are many more entries like this. I don’t understand what the purpose of this is. Looking forward to an answer! ! ! Thank you to my classmate for helping me resolve my confusion. :handshake:handshake:handshake
The names are different; in my opinion, the naphtha component you’re referring to is light gasoline – is it the oil extracted from the top of the distillation tower? The hydrogen-to-oil ratio is determined by the volume ratio of the hydrogenated oil to hydrogen gas.
Yes, it’s light gasoline, but I don’t understand why the sulfur content of the light gasoline fed into the unit varies from time to time, which in turn requires different adjustments to the hydrogen-to-oil ratio. (PC24C means that each component added during oil filling corresponds to 21.8W%. I don’t understand this.)?
This is just a theoretical value that can be adjusted; the lower the proportion of low-octane gasoline used, the lower the sulfur content. The theoretical values are only based on the design materials
The device operation manual specifies a hydrogen-to-oil ratio of not less than 200 by volume. What does this mean? The flow rate of fresh hydrogen entering the unit is controlled at 125 NM3/h; there is no standard specification for the recycled hydrogen, only a purity requirement of over 80%. No specific amount is specified for the feed oil either. How to adjust the hydrogen-to-oil ratio so that it is not less than 200 volume ratio?
Add me on QQ at 917+8327+93 for a private chat; chatting like this is too troublesome
The hydrogen-to-oil ratio is determined based on the hydrogenation technology used in this unit; it must not be lower than this value, otherwise the degree of hydrogenation will be insufficient and the sulfur content in the product will not meet the requirements； The sulfur content varies among different raw materials. The types and levels of sulfur content in oils are determined by the fractions of the crude oil; therefore, when the sulfur content in the crude oil is low, it is possible to reduce the hydrogen-to-oil ratio appropriately to meet the requirements. The amount of recycled hydrogen is related to the flow rate of the recycled hydrogen compressor, and the hydrogen partial pressure in the reaction can be determined from the hydrogen purity. In practice, the hydrogen-to-oil ratio can be controlled by the feed rate of the crude oil.
Does insufficient hydrogenation depth refer to temperature or the desulfurization effect? (I only know that it is a standard for National V gasoline.) Is a hydrogen purity of over 80% higher than 0.8? We estimate the feed oil volume to be 6500 KG/h, and the amount of oil used in hydrogenation is 6230 KG/h. No matter how I calculate the hydrogen-to-oil ratio, it’s incorrect; it seems to me that the amount of oil used in hydrogenation isn’t that high Could you help me solve three problems?