HDS Hydrodesulfurization Catalysts (Par-Hyd-Cat)

Product Introduction:

Hydrodesulfurization is a process in which sulfur-containing components present in crude oil or natural gas cuts used in petroChemicals are removed by reaction with hydrogen. This process results in the removal of nitrogen and oxygen along with the hydrogenation of aromatics and olefins; Therefore, the set of these processes is called hydrotreating.

Heavy metals, aromatics and olefins can also be removed with the help of par-Hyd catalysts. Hydrotreating simply leads to the conversion of organic compounds containing sulfur, nitrogen and oxygen into hydrocarbons and hydrogen sulfide, ammonia and water, respectively. At the same time, it is possible to convert olefins and aromatics into saturated hydrocarbons without any cracking process on hydrocarbons. In fact, this process leads to the production of fuels with the lowest amount of sulfur and impurities. With the passage of time and heavier crude oil entering the refineries, the amount of sulfur compounds in the hydrocarbon cuts from the distillation tower has also increased. Environmental regulations based on the production of refined products, including gasoline and diesel, are compatible with quality and environmental standards in such a way that the permissible limit of pollutants is reduced every year; Therefore, refiners have been directed to use processes to reduce the amount of sulfur and polluting compounds in hydrocarbon cuttings. Due to the catalytic nature of this process, this product includes the catalyst used in these processes.

Technical Specifications:

To make this type of catalyst, gamma-alumina is often used as a catalyst base. The active metal catalyst is nickel or cobalt and molybdenum, which is added to the catalyst base using various methods, including common Impregnation methods. It is worth mentioning that due to the existence of different cuts in an oil refinery, such as naphtha, kerosene, gas oil, and mazut, a special process and catalyst are used for each of these cuts. Naphtha catalysts include naphtha hydrotreating (NHT), kerosene hydrotreating (KHT) and gas oil hydrotreating (GHT) catalysts.

The preparation of these catalysts consists of several steps:

1. Preparation of catalyst base or support, which is usually a formulation based on gamma alumina. (The company claims that it uses gamma alumina produced by the company itself).

2. Formation of the catalyst base

3. Drying and curing the catalyst base

4. Solubilization of catalyst salts, which are water-soluble salts of active metals (nickel, cobalt, and manganese).

5. Impregnation of the catalyst solution on the catalyst base

6. Heat treatment and final drying (removal of physical water) and calcination (removal of chemical water in meso and micro pores) of the catalyst