Reduce diesel production

Methods to reduce production: 1. Methods to increase the initial boiling point of diesel and decrease its final boiling point； ⒉Increase the reprocessing of diesel in catalytic cracking to produce more gasoline. Produces gasoline, light diesel, and aviation fuel.

At normal pressure it’s possible; catalysis requires adjusted operations, and production should be carried out according to the gasoline process.

This is only useful at atmospheric pressure; catalysis should deepen the reaction depth, increase the reaction temperature, and boost the catalyst activity within the system.

I agree with the opinion from the third floor... Under normal circumstances, in a catalytic reaction riser, diesel is not directly injected into the process to facilitate catalytic cracking as a way to adjust the catalytic reaction. For the reprocessing of diesel, we use atmospheric or vacuum distillation processes, or send it into an absorption unit where it is slowly processed and reused. What’s most important in catalytic reactions is stability; only when the raw materials are stable can the product distribution remain stable. If one wants to change the yield distribution of the final products, it’s better not to rely too much on adjustments made during the reaction stage. Instead, focus on factors such as the width of the distillation range, product processing methods, and raw material selection – that’s the right approach. When working in technical management, don’t just make suggestions based on assumptions or try to show off the theoretical knowledge learned in university. According to chemical equilibrium theory, intentionally adding more of one of the products to the side of the catalytic reaction equation can reduce the actual yield of that product. If you applied this logic when taking exams on chemical equilibrium theory, I would definitely give you full marks... But in actual chemical production, as a practical organizer and technical manager, one cannot rely solely on theory. It’s more important to consider the costs and side effects associated with certain approaches; otherwise, it will lead to negative consequences. I believe that as people spend more time in the petrochemical industry, they will gain more experience and insights... That means technology needs to be combined with economics, safety, and the practical challenges involved in operations... etc. I don’t support the idea of using diesel in the reaction process to reduce the yield of catalytic diesel. In fact, such a practice hasn’t been seen yet. Isn’t that simply reducing the amount of catalytic treatment? Using products as raw materials in the riser is a foolish approach that wastes resources. If done this way, diesel will undergo catalytic cracking. Leaving aside any potential interactions with waxy oils, just from the perspective of diesel cracking alone, it will definitely result in the formation of gasoline and gases. There will also be issues related to gum formation, carbon formation, and the generation of sludge that needs to be reprocessed. In short, it will definitely reduce economic efficiency. Everyone knows that the value of catalytic diesel far exceeds that of waxy oils or residue oils. I won’t say more. I advise everyone, especially those who want to reduce diesel yields, to come up with economically viable solutions for their managers. I’ve seen many posts on this forum discussing such simple topics. There are plenty of ideas, but few that are actually feasible. To avoid further debates, I’ll suggest some general solutions and approaches here: 1. Tell your boss that if you want to produce less diesel, choose heavier crude oils or those with lower diesel yields during atmospheric/vacuum distillation. Control the range of the diesel fraction carefully. If one end of the range is too heavy and the other too light, it will definitely result in less diesel production... (Forget about making money for now... hahaha...) 2. Tell your boss that if you want to produce less diesel, choose appropriate raw materials. Avoid using naphthenic waxy oils, as they yield a high amount of diesel and easily cause color changes. Instead, use paraffinic or intermediate waxy oils mixed with residue oils. Follow the gasoline production guidelines and increase the reaction temperature as much as possible. Ignore concerns about coking rate and dry gas production. The distillation unit should also be adjusted to control the diesel fraction. This will definitely result in less diesel production... (Don’t worry about economics or profitability for now... until such that it forces all companies to shut down... hahaha...) 3. It’s true that diesel is currently in short supply, and raw material prices are high. Diesel and gasoline are piling up in warehouses, causing difficulties for administrative and technical managers. It’s a test from the market for those who aren’t truly competent. I hope that when working in technical roles, people will consider the combination of technology and economics. If we only focus on market demands, then in this economic crisis, without demand, our refineries won’t be able to survive. We need to combine theory with practice better. People should explore various methods using their specific raw materials to find a balanced approach that ensures both efficient operation and profitability for the refinery. Otherwise, why would anyone continue to work in the refining industry? Haha... [This post was last edited by wangsc on 2009-3-8 19:10]

Agree with the opinion from the third floor; the gasoline-based solution works fine, normal pressure is sufficient, and catalytic adjustment can be used! !