How does your facility implement plans to increase gasoline production?
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The group company has requested that the plant develop a production plan to increase gasoline output. How did your plant go about doing this?
Produce more gasoline blending components: raise the dry point of the stabilizing gasoline to the maximum allowable level; produce more reforming feedstock oil and less naphtha; produce more reforming product oil and less aromatic products; reprocess low-octane gasoline components, etc
It mainly increases the dry point of gasoline, resulting in less naphtha and diesel production.
Regarding the increase in the dry point of gasoline, I have a question: if the dry point of the constituent gases increases, how can we ensure that the dry point of the final gasoline remains within the controlled range?
The dry point of gasoline is controlled at an upper limit to increase gasoline yield.
Increase the dry point of gasoline, raise its vapor pressure
The dry point of the stable steam is controlled at 203±2. Add all that can be added: naphtha, toluene, xylene, MTBE.
Catalysis: Significantly increases the dry point of gasoline and the freezing point of diesel –8 >>>> +8, 175 >>>> 200
What was said on the 5th floor is correct; gasoline products are regulated by upper limits.
Apart from the distillation point, from a process perspective, for example in hydrogenation units, the operating temperature can be increased to raise the cracking rate, increase the production of naphtha, and then use reforming to produce gasoline. Additionally, there are currently technologies for producing gasoline from catalytic naphtha, which primarily take advantage of the high branched-chain content and high aromatic content of catalytic naphtha to partially crack it and produce high-octane gasoline.
In addition to considering the dry point of gasoline, adjustments can also be made to the reverse regeneration system, such as by injecting terminators, appropriately lowering the reaction temperature to reduce secondary reactions and excessive cracking of oil and gas, as well as increasing the catalyst circulation rate.
The catalytic partial adjustment is likely to have little effect
Our unit also adopted a plan to increase diesel production last year; the specific plan was based on a paper from the Karamay Refinery in Xinjiang. Everyone can look into that paper – it’s advisable to keep the final boiling point of the diesel fraction between 370°C and 375°C. Otherwise, the stability of the diesel deteriorates, and rapid changes in color can affect the quality of the product before it leaves the factory； Secondly, the dry point of diesel exceeds the specified limit; operational conditions and the modification of certain equipment are key factors. It’s explained quite clearly in the paper. I’ll go look for it and share it with everyone once I find it. *Improvement! This post was last edited by yuzhu0524 on 2009-2-25 at 17:27.]
The dry point of gasoline is controlled at an upper limit in order to increase gasoline production and reduce diesel production.
In the atmospheric and vacuum distillation unit, the gasoline level is currently controlled at 150–160, which represents the upper limit.
To enable the catalytic unit to produce more gasoline, the reaction section must first employ a higher degree of reaction, operating under conditions of high conversion rates and low recycle ratios, or through single-pass cracking. Specifically, a higher reaction temperature should be used; operating with a larger catalyst circulation volume is also an option. Molecular sieve catalysts that exhibit high activity, good selectivity, and the ability to produce more gasoline can be utilized to achieve satisfactory results； At the distillation station, operate the gasoline dry point at the upper limit to produce as much gasoline as possible.
Simply, if it’s necessary to widen the gasoline boiling range, then find a way to do so. . . Catalytic reforming of gasoline or gas production schemes. . . The others are just the same two methods and approaches mentioned above. . . :lol
The market is currently short of gasoline; what technologies can effectively increase its supply?
Our factory’s approach: adjust the reaction temperature through catalysis, control the dry point of gasoline properly, and increase it by 5–10 degrees Celsius (205–210°C)； Reduce diesel production: Properly control the 95% point of diesel (around 320°C)
In hydrocracking, more heavy fractions are produced and fewer light fractions; the dry point of the heavy fractions approaches the upper limit of 175. The reaction section can be used to control the degree of cracking, while the distillation section allows for an appropriate increase in the top temperature and a reduction in the reflux from the middle section
Device Name, Control Scheme, Control Parameters, Unit, Specifications: Distillation – Control of the initial dry point at the top of the distillation column at or below the upper limit; the constant third line is modified for cracking. Initial dry point at the top of the column: ℃ ≤165; Dry point at the top of the column: ℃ ≤165; 95% distillation temperature at the constant third line: ℃ ≤365. Catalysis – Control of high-load processing capacity； The reaction temperature is increased ； The dry point of gasoline after distillation is controlled at its upper limit ； Raise the initial distillation temperature of diesel to improve separation; dry point of crude gasoline: 204±6 °C; dry point of gasoline after dehydration: 204±6 °C. For hydrogenation, the dry point of gasoline is controlled at the upper limit; dry point of gasoline: 200±6 °C. Continuous reforming allows for high throughput and heavy-load operation ； The initial boiling point of the reformation feed increases ； Increased benzene content in gasoline: Benzene content % ≤4; Reforming dry point ℃ ≤210. Improved quality of gasoline; Dry point of the finished gasoline ℃ ≤204