What is the purpose of hydrodesulfurization?
Hydrodesulfurization is a high-pressure (150 to 250 psig) and high-temperature (200 to 425°C) process that uses hydrogen gas to reduce the sulfur in petroleum fractions (particularly diesel) to hydrogen sulfide, which is then readily separated from the fuel.
How is Sulphur removed by hydrodesulfurization?
Hydrodesulfurization (HDS) is the current industrial method to remove aliphatic and acyclic sulfur-containing compounds from diesel oil. This process is usually applied using CoMo and NiMo-type catalysts and allows removing sulfur compounds by their conversion to H2S [5], [6].
How do Hydrotreaters work?
During hydrotreating, crude oil cuts are selectively reacted with hydrogen in the presence of a catalyst at relatively high temperatures and moderate pressures. The process converts undesirable aromatics, olefins, nitrogen, metals, and organosulfur compounds into stabilized products.
Which reactor is used for hydrodesulfurization?
co-current trickle bed reactors
Hydrodesulphurization (HDS) of gasoils is conventionally carried out in the petroleum industry in co-current trickle bed reactors.
How is sulphur removed from crude oil?
Sulfur removal from crude oil and straight-run diesel was achieved by combining gamma-irradiation with other physical/chemical processes (i.e. liquid/liquid extraction and oxidation) which provided a considerable levels of total sulfur reduction in the investigated products (AH and SRD).
How is sulphur removed from natural gas?
Traditionally natural gas treatment for sulphur removal is done with Claus/amine based scavenging or technology (dry or wet). In the past decades this hasn’t changed much, event though the needs of the market have shifted.
What catalyst is used in hydrocracking?
zeolite catalyst
The performance of hydrocracking units is fundamentally dependent on the zeolite catalyst used to break down the heavier oil molecules.
What is a hydrodesulfurization unit?
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 is sulphur removed from fuels?
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.
How do you remove sulfur?
Chlorine bleach can effectively remove medium to high levels (over 6 mg/l) of hydrogen sulfide. The chlorine in the bleach chemically reacts with (oxi- dizes) the hydrogen sulfide eliminating the “rotten egg” odor. Chlorine bleach also reacts with iron or manganese, and disinfects water supplies.