What is a hydrodesulfurization unit?
In an industrial hydrodesulfurization unit, such as in a refinery, the hydrodesulfurization reaction takes place in a fixed-bed reactor at elevated temperatures ranging from 300 to 400 °C and elevated pressures ranging from 30 to 130 atmospheres of absolute pressure, typically in the presence of a catalyst consisting …
How do you remove Sulphur from fuel?
The current industrial method for removal of sulfur from fuels is hydrodesulfurization (HDS), which is a high temperature, high pressure catalytic process. This makes HDS a very costly option for deep desulfurization.
What is the purpose of hydrodesulfurization?
Hydrodesulfurization (HDS) or Hydrotreating is a catalytic chemical process widely used to remove sulfur compounds from refined petroleum products such as gasoline or petrol, jet fuel, diesel fuel, and fuel oils.
How do you remove sulfur from diesel?
Hydrotreating is the most common method for removing sulfur from diesel fuel as of today. This process is very expensive. The cost of hydrotreating units depends on the performance and the required depth of processing, and in theory it can reach millions of US dollars.
Why is sulfur used in diesel fuel?
Diesel fuel contains sulfur which derives from the original crude oil source and can still be present after refining. After combustion in the engine, the sulfur in fuel forms particulates that are a primary contributor to air pollution and the cause of harmful corrosion in the engine.
What does Sulphur do in petrol?
Sulfur is a natural component in crude oil that is present in gasoline and diesel unless removed. Sulfur in gasoline impairs the effectiveness of emission control systems and contributes to air pollution. Reducing the sulfur content in gasoline enables advanced emission controls and reduces air pollution.
Why do we need hydrotreating?
The purpose of a hydrotreater unit is primarily to remove sulfur and other contaminants from intermediate streams before blending into a finished refined product or before being fed into another refinery process unit.
Why are Hydrocrackers so valuable to a refinery?
The hydrocracker is particularly valuable in a refinery that is trying to maximize diesel production and reduce residual fuel oil. The hydrocracker yields a high volume of kerosene and light gasoil (distillate) of good quality (high cetane and low sulfur).
What is a hydrocracking unit?
A hydrocracking unit, or hydrocracker, takes gas oil, which is heavier and has a higher boiling range than distillate fuel oil, and cracks the heavy molecules into distillate and gasoline in the presence of hydrogen and a catalyst.
