Regarding the National VI standards and the composition of new formula gasoline, which devices will become popular?
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As the title suggests: National Standard V has led to the widespread use of gasoline hydrogenation desulfurization, etherification, and alkylation units. Questions: 1. What are the key parameters for National Standard VI gasoline? Is 15% olefins one of them? Aromatic hydrocarbons 30%? Is the ratio of olefins to aromatics less than 40%? 50% at 120°C? It might not be entirely accurate; please correct and add more details! 2. Can everyone meet the current National V standards? How much was lost in terms of octane rating and efficiency respectively? 3. The National VI standards will lead to **changes in gasoline formulations. May I ask: what is the current status of the use of alkylation (solid acids)? 4. What units are included in the alkylation and isomerization units? What are the reasons why there is no large-scale implementation at the moment? ? ? 5. If National VI standards are implemented, how will current refining and chemical integration be adjusted? Manager Discussion Group
The key sulfur content specifications for National VI gasoline are no more than 150 ppm (a unit of measurement for gas concentration) and 50 ppm, respectively
Alkylation units mainly include hydrorefining, reaction, refrigeration compression, effluent refining, product distillation, and chemical treatment. Many alkylation and isomerization units have been put into operation recently, while many others are shut down.
Alkylation will become standard, and the proportion of base oil from catalytic cracking will further decline; ultimately, a composition of 1/3 each for catalytic gasoline, reformed gasoline, and alkylated oil will be achieved
What does 150ppm mean? For National VI standards, the sulfur content must be less than 30
Have the National VI standards and various specifications been released? Could you share it?
I can overlook the guy who claims that the sulfur content limit for National V gasoline is 150PPM, but the 30PPM figure you mentioned – what century’s standard is that? Please don’t talk nonsense if you don’t know anything! The sulfur content limits for National V and National VI standards are both below 10 PPM; we really give in to you guys! :funk:
This is currently a draft version of the standards: for National VI gasoline, the threshold is not more than 110°C; the aromatic content must be no more than 35%, and the benzene content must be no more than 0.8%. Regarding olefins, two different proposals exist – one specifies a limit of not more than 18%, while the other specifies a limit of not more than 15%. Sulfur has not changed
Sulfuric acid alkylation mainly consists of a feedstock light-end removal system, a reaction system, a distillation system, an acid circulation system, and a refrigerant circulation system