Oil exploitation
In the development of sour natural gas and oil fields in low-lying areas and the development of subsea oil and gas fields, not only a large amount of H2S gas is produced, but also the seawater erosion makes the drilling pipeline sulfurized brittle and corroded rapidly. High strength stainless steel pipe containing molybdenum can effectively resist the corrosion of H2S and seawater, greatly save steel and reduce the drilling cost of oil and gas wells.
Molybdenum can not only be used in oil and gas field drilling pipeline, but also often combined with drilling and nickel. Catalysts for petroleum refining pretreatment mainly include desulfurization of petroleum, petrochemical products and liquefied coal. In the process of hydrogen treatment, sulfide reacts with hydrogen on the surface of catalyst, and sulfur ion is removed in the form of hydrogen sulfide. Meanwhile, nitrogen and metal impurities in crude oil are eliminated, so as to reduce the poisoning of these impurities on other catalysts during petroleum refining, so as to improve the color, smell and stability of products. After passivation, a layer of carbon remains on the surface of molybdenum catalyst. If the carbon layer is burned off, the catalyst can recover its active state, and its service life can be about 1-5 years. Molybdenum plays an important role in petroleum cracking and reforming. It is an ideal electron donor and carrier.
