MARC Catalyst Technology

Sweetening of Oil Products

Advanced & Unique Odorless Fuel Oil


About the Company

The company in Cyprus was founded 14 years ago based on know-how from Lomonosov Moscow State University (lab of molecular-organized catalytic systems).

The company's specializes in the development and production of catalysts for the oxidative purification of oil and oil products from active sulfur compounds (hydrogen sulfide and mercaptans). The technologies we use are protected by patents of the Eurasian Patent Union, the USA and Canada.

The company mission is to provide high-end and low cost solutions for Odorless Fuel Oil by removing the hydrogen sulfide and the mercaptans.

Our solution for fuel oil is in production in the refining industry since 2015. In Tuapse refinery (Rosneft) our technology has been used to purify straight-run fuel oil from hydrogen sulfide from 40 to less than 2 ppm. and the annual savings of the company is around 50% when compared to the alternative annual operating charges for hydrogen sulphide removal.


Bernard Hertz – Chairman 

Boaz Amram – CEO

Alexey Konovalov – CTO

Pictures of our unit in Nizhniy Novgorod

Our Solution

Sweetening of Fuel Oil Products

MARC is the first direct catalytic process for converting mercaptans by oxidation to disulfides.

Implementation of MARC technology in the process of hydrogen sulphide removal from heavy fuel oil increase export potential of this kind of product and decrease operating charges of the refinery.

Our company implements MARC technology at all levels of the process. The entire cycle – starting with laboratory tests through industrial equipment launch – takes about 4-6 months.

Over 14 years of scientific research & trails

We conducted extensive industrial pilots in many refineries in the USSR which allow us to improve the solution, to lower the cost and to reduce any potential risk of using it.


MARC catalyst Technology

In accordance with technical regulations for furnace fuel the hydrogen sulfide content shall not exceed 2 - 10 ppm (depend on local regulation per country). The content of hydrogen sulfide in raw components of fuel oil is limited by 20-40 ppm for a straight run, and by 60-140 ppm for visbreaker tar. Therefore, the content of hydrogen sulfide has to be reduced.

One of the old ways to reduce hydrogen sulfide content in commercial fuel oil is inclusion (injection) of hydrogen sulfide scavengers (absorbents)  in the oil flow. Scavengers operation includes chemical binding of hydrogen sulfide with the formation of non-volatile chemical compounds.

The process of hydrogen sulphide binding takes a long time and, in its significant part, occurs directly in the reservoir. In addition, in fuel oil components, volatile highly toxic mercaptans are generally present, for which hydrogen sulphide scavengers are ineffective. As a result, significant amounts of dangerous, foul-smelling substances through the respiratory system of the reservoirs fall into the surrounding atmosphere, which leads to a deterioration of the environmental situation in the area of ​​the refinery. It should be noted that the threshold of sensitivity of the human sense of smell to this class of substances is significantly lower than the level that represents a real danger. This leads to the creation of negative, often unjustified, impression by the general population about the refinery as the main sources of pollution of the ambient air.

MARC catalyst technology of fuel oil cleaning is the oxidation of hydrogen sulfide and mercaptans by air oxygen in the presence of MARC (Mercaptan Arid Conversion) homogeneous catalyst according to the following scheme:


The decrease of mercaptan sulfur content in the product is achieved by direct mercaptans conversion to disulfides:


H2S and mercaptans oxidize by MARC catalyst directly in hydrocarbon raw materials flow. Because of reactions high velocities, almost complete removal of H2S and mercaptans from the product is possible during its internal pipeline run before it enters the commercial tank. The absence of H2S and volatile mercaptans in the product entering the commodity tank, eliminates harmful emissions into the atmosphere, after reaction residual nitrogen is removed through basins.

Flow diagram for fuel oil:


Successful Implementation & Trials


The first industrial use of our catalysts took place at a gas processing plant in Astrakhan in 2008. We reduced the concentration of light mercaptans (C1, C2) in gas condensate fuel oil from 200 ppm to 2 ppm.

Kstovo (Lukoil)

In 2015, Catalytic oxidation was successfully applied to reduce the concentration of hydrogen sulfide in visbreaking fuel oil from 150 to 10 ppm at the refinery in Kstovo (Lukoil).

Tuapse (Rosneft)

One of the most successful implementations of our technology is in Tuapse refinery. Since 2016 we reduced the hydrogen sulphide in heavy fuel oil from 40 to lower than 2 ppm in the final product. As a result of the improvement the export demand for fuel oil increased dramatically since it now conformed to the requirements of the European standards.

In addition, the annual savings of the company is around 50% of the alternative annual operating charges for hydrogen sulphide removal.


Since 2018, the catalytic oxidation of hydrogen sulphide and mercaptans has been used by the refinery in Krasnodar to improve the environmental situation in the area of ​​the plant surrounded by residential areas.


Since 2019, the technology has been used to purify technical kerosene from mercaptans at the refinery in Shakhtinsk.


Future Roadmap Solutions


Crude Oil & Gas Condensate Production

MARC technology is unprecedented in its compactness. It can be implemented by itself in direct dosing of catalyst into the flow of crude oil/product.  This allows for attaching MARC technology equipment to the existing oil processing unit, as well as into new prospective systems of oil processing.

MARC catalyst-based technology makes it possible to carry out the “dry” demercaptanization directly within the oil product flow. This ensures the absence of waste formation. Capital costs and time for the equipment assembly will be several times lower than the existing alternative solutions.


Aviation and Other Fuels

MARC catalyst technology is based on the oxidation of highly corrosive light mercaptans and heavy mercaptides to inert disulfides.

This chemical reaction is effectuated in the soft conditions and capital expenditures are 10-12 times less in comparison with hydrofining unit construction and operation. 


Liquefied Petroleum Gas

The Global Liquefied Petroleum Gas (LPG) market is set for growth, and is expected to reach a value of USD 346.63 billion by 2024 from USD 267.88 billion in 2017.

The most economically effective way to remove light mercaptans and heavy mercaptides from liquefied gases.


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SBA Consultants Ltd.

27 Akiva st., Raanana 4326105, Israel.



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