Close

Catalytic hydrocracking Back

Action Hydrogenate
Method Catalytic
Purpose Convert to lighter hydrocarbons
Feedstock Gas oil, cracked oil, residue
Product(s)

Lighter, higher-quality products; gas

Product(s) goes to

Blending
Gas plant

Located in the middle of a refinery, hydrocracking can eliminate many troubles refiners face, when the market requirement changes from season to season. Hydrocrackers can produce gasoline components from various types of gas oils (LGO or HGO, cracked, or SR from distillation unit). They can produce light distillates (e.g. jet fuel) from HGO. Hydrocrackers can produce iso-butane, a necessary material for the alkylation unit. The most important feature of a hydrocracking unit is that it does not produce any bottoms (residue). The final product is low-boiling, high-value and light; such as light oil, gasoline, jet fuel or distillate fuel.

Refiners use the hydrocracking process to produce products from max diesel & distillate fuels in the winter time to max gasoline and maybe even jet fuel in the summer time.

Hydrocracking is simply catalytic cracking in the presence of hydrogen & catalysts, in that relatively heavier feedstock is cracked to produce more desirable lighter products. Hydrocracking has an advantage over catalytic cracking: In hydrocracking, high-sulfur feedstock can also be processed without previous desulfurization.

In the first stage, feedstock is mixed with hydrogen, heated and sent to the first reactor, where a large amount of the feedstock is converted to middle distillates. Sulfur and nitrogen compounds are converted here by a catalyst to hydrogen sulfide and ammonia. The residue is heated and sent to a high-pressure separator, where gases rich in hydrogen are removed and recycled. The remaining hydrocarbons are stripped to remove the hydrogen sulfide, ammonia and light gases, which are collected in an accumulator, where gasoline is separated from sour gas.

Liquid hydrocarbons from the first reactor are mixed with hydrogen and sent to a second reactor, where they are cracked into high quality products, like gasoline, jet fuel and distillate blending stocks. These products are processed further to remove gases. The light naphtha is also used in gasoline blending.

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.

Accuracy:
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 Catalytic hydrocracking

The DMA 35 Ex Petrol portable density meter measures the API gravity, API SG or API density (calculated from true density) of the different final products resulting from catalytic hydrocracking (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.