Neftesintez

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Hydrogen Sulfide Removal From Crude Oil And Oil Products

The problem of eliminating of hydrogen sulphide (H2S) in the crude oil and petroleum products in recent years is getting increasingly acute.

There are a few approaches to hydrogen sulfide removal:

A key disadvantage of the first two methods is quite high loss of oil in form of hydrocarbon vapor blown away with hydrogen sulfide, which affects quality of the oil.

The disadvantages of the most commonly used scavengers are in their content – most of them are formaldehyde based composition - a chemical that is toxic and carcinogenic.

For comparison the permissible threshold for formaldehyde is 0,5 mg/м?, and for hydrogen sulfide is in 20 times higher (10 mg/м?).

Our company offer a catalyst for binding hydrogen sulfide with the procedure, which does not require special equipment and air supply into crude oil.

Use of the catalyst THIONOL is waste-free and environmentally friendly.

The catalyst of the catalytic oxidation THIONOL found its application both in refineries and in the oil fields of Russia and Kazakhstan.

Traditional Scavenger THIONOL Catalyst
Method Of Application Dosing Into Flow Dosing Into Flow
Rate Of Dosage (Chemical ppm / H2S ppm) 3/1 1/1
Harmful Contaminant Formaldehyde No
Air emissions Formaldehyde No
Deposits in the pipes Yes No

The need to ban scavengers based on formaldehyde (triazine).

Product of reaction of hydrogen sulfide formaldehyde are organosulfur compounds, which are not naturally occur in crude oil. These compounds are not removed during the preparation of oil at oil field and in refinery distillation column. During distillation, reaction products of formaldehyde with hydrogen sulfide undergoing thermal decomposition to form active volatile sulfur compounds (including recombinant mercaptans) which leads to problems in the processing of crude oil.

It is also worth to note that use of hydrogen sulfide scavengers based on derivatives of formaldehyde leads to an unpleasant smell during preparation of oil before trnsportation.