How can catalytic cracking operations be adjusted to reduce the benzene content in gasoline?
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How can catalytic cracking operations be adjusted to reduce the benzene content in gasoline? Let’s discuss what the effects are of operating while reducing the benzene content
The original poster has raised a global challenge. The volume fraction of conventional catalytic cracking gasoline does not exceed 1%. The propylene yield in this process is high, sometimes reaching 2.1%. Due to the two key characteristics of catalytic gasoline—low benzene content and high olefin content, which have a devastating effect on solid acid catalysts—there are currently no successful subsequent treatment methods available. From the perspective of catalyst operation itself, it is impossible to avoid this directly; the only option is to reduce the severity, which often leads to a decrease in efficiency. Therefore, the plant usually adopts conventional practices, typically controlling the benzene content in the finished gasoline through oil blending.
I really haven’t heard of it; the processes and adjustments for reducing benzene levels
Reducing the severity is merely a suitable adjustment method, while lowering the gasoline yield affects the product distribution. To ensure the yields of liquefied gas and propylene, it is necessary to maintain an appropriate catalyst-to-oil ratio, which in turn affects the circulation in the regeneration system and the occurrence of coking. When using the approach of reducing strictness along with adjustment, it is also necessary to weigh the amount of profit involved. Can the properties of the raw materials be improved to control the benzene content in the finished gasoline? Can an optimal method that maximizes efficiency be found to control the benzene content in finished gasoline?