What is hydrodesulfurization process?

Hydrodesulfurization (HDS) is a catalytic chemical process widely used to remove sulfur (S) from natural gas and from refined petroleum products, such as gasoline or petrol, jet fuel, kerosene, diesel fuel, and fuel oils.

What is Sulfiding process?

The Sulfiding Process. The sulfiding process involves passing feed spiked with a sulfiding agent over the catalyst bed in a carefully controlled procedure that includes several temperature holds.

What is the main purpose of 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.

What is hydrotreating in petroleum refining?

Hydrotreating or hydrodesulfurization refers to a set of operations that remove sulfur and other impurities (Figure 1). During hydrotreating, crude oil cuts are selectively reacted with hydrogen in the presence of a catalyst at relatively high temperatures and moderate pressures.

What chemical is used in the desulfurization process?

A widely used mixed chemical/physical process is Sulfinol, which uses a mixture of Sulfolane (tetra-hydrothiophene dioxide) and an aqueous amine (Korens et al., 2002).

What is DHDS unit in refinery?

Diesel Hydrodesulphurisation (DHDS) Unit. High Speed Diesel (HSD) contains contaminants like organic sulphur, nitrogen and metal compounds which contribute to increased levels of air pollution, equipment corrosion etc.

What is meant by fuel gas desulphurisation?

Abstract. Flue-gas desulfurization (FGD) materials are solids generated when the SO2 in exhaust gases from coal-fired power plants is removed before the gases are released to the atmosphere.

What type of reaction is desulfurization?

Desulfurization or desulphurisation is a chemical process for the removal of sulfur from a material. This involves either the removal of sulfur from a molecule (e.g. A=S → A:) or the removal of sulfur compounds from a mixture such as oil refinery streams.

How do you test sulphur content in diesel?

The ASTM D 7039 Standard Test Method for Sulfur in Gasoline and Diesel Fuel by Monochromatic Wavelength Dispersive X-ray Fluorescence Spectrometry is similar to the WDXRF technique, ASTM D 2622, in that it relies on exciting K-shell electrons in sulfur and then measuring the resulting fluorescence as they return to …