Hydrodesulfurization Back

Action Hydrogenation treatment
Method Catalytic
Purpose Remove impurities (nitrogen, sulphur, metal…), saturate hydrocarbon
Feedstock Residues, Naphtas, distillate Cracked hydrocarbon Sour gas oil


Product(s) goes to

Gas plant

Crude oil has all sorts of contaminants. If these contaminated petroleum fractions pass into the refinery processing units, the impurities can harm the equipment and the catalysts. When they leave the refinery in finished products, they can also pollute the environment. Therefore, refineries or governments set limits on the amount of some impurities; among the most important of these is sulfur.

Any refinery streams that have C6 and heavier hydrocarbons do probably have some sulfur in the mixture, even if they come from sweet crude. The sulfur is attached to different molecules and cannot be removed by mechanical processes like distillation; it has to be removed chemically. Catalytic hydrotreating is a hydrogenation process used to remove about 90 % of contaminants such as nitrogen, sulfur, oxygen and metals from liquid petroleum fractions.

Hydrotreating to remove sulfur is called hydrodesulfurization. In a typical catalytic hydrodesulfurization unit, the feedstock is mixed with hydrogen and charged under high pressure in a reactor. After the process, the hydrogen is recycled and the product is stabilized in a column to separate the light ends. During this process, sulfur and nitrogen compounds are removed from the feedstock and converted to hydrogen sulfide (H2S) and ammonia (NH3).

DMA 35 Ex Petrol

The DMA 35 portable density meter measures the density, SG and °API of samples on-site within seconds. The intrinsically safe instrument (ATEX-marking II 2 G Ex ib IIC T4) has a special housing, resistant to petroleum samples. It is therefore perfectly suitable for measuring petroleum samples in hazardous areas. The integrated RFID interface enables quick sample identification (e.g. tank number) before measurement. Measured results can be stored and printed or exported to a PC wirelessly via IrDA later on. The instrument fully complies with the ASTM D7777 standard.

0.001 g/cm3

Repeatability s. d.:
0.0005 g/cm3

Measuring range:
0 g/cm3 to 3 g/cm3

Minimum sample volume:
2 mL

Benefits of DMA 35 Ex Petrol at Hydrodesulfurization

The DMA 35 Ex Petrol portable density meter measures the API gravity, API SG or API density (calculated from true density) of the different liquid final products and byproducts resulting from hydrotreating (product group B: refined products) directly at the sampling location for quick identification. It automatically displays the measured value, already compensated to your reference temperature of choice.