Catalytic cracking (DCC) naphtha

Does the catalytic unit produce naphtha? You mean crude gasoline, right?

It is crude gasoline, sometimes referred to as naphtha.

The crude gas oil enters the absorption tower of the stabilization system, while the rich absorption oil goes to the desorption tower; the desorbed oil then enters the stabilization tower to form stabilized gasoline, which is sent to the hydrogenation unit for hydrodesulfurization before being exported as the final product.

1. The gasoline reprocessing nozzle is used for cracking. The nozzles are divided into upper nozzles and lower nozzles. 2. It can also be fed into a gasoline cracking furnace for separate cracking.

I haven’t worked with DCC devices before, but I’d like to analyze them for reference only. DCC uses heavy oil as a raw material, and similar to catalytic cracking, its aim is to produce more gaseous products. Most of the readily cleavable linear hydrocarbons have undergone cleavage; the naphtha fraction should be composed mainly of aromatics, giving it a high octane rating. Since heavy oil is used as the raw material, impurities such as sulfur and nitrogen are likely to be present in large amounts. During high-temperature pyrolysis, there should also be a significant amount of unsaturated hydrocarbon components, resulting in poor stability. Regarding this naphtha, in my opinion: it should first be hydrogenated and refined to remove sulfur and nitrogen, and the unsaturated hydrocarbon components should be hydrogenated to saturation in order to improve its stability. Hydrogenated naphtha has two possible destinations: it can be used as a component in gasoline blending, or it can serve as a raw material for producing aromatic compounds BTX.

Thank you:handshake

Thank you:handshake

Thank you:handshake

Hydrogen cutting: 30-180 or 75-180 to the aromatics plant; it can also go to the large ethylene plant

DCC naphtha contains a high amount of aromatics and can be used as a reforming feedstock