The difference between regular diesel and hydrogenated diesel

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　Difference between regular diesel and hydrogenated diesel Hydrogenated diesel is more environmentally friendly than non-hydrogenated diesel, and due to the increased hydrogen content, it produces more heat energy upon combustion. The reason is hydroprocessing, one of the most important refining methods for petroleum products. It refers to the process of converting harmful impurities such as sulfur, oxygen, and nitrogen in oils into corresponding hydrogen sulfide, water, and ammonia under hydrogen pressure and in the presence of a catalyst, thereby removing these impurities. It also involves the hydrogenation of olefins and dienes to saturate them, as well as the partial hydrogenation of aromatics, in order to improve the quality of the oils. Sometimes, hydrofining refers to the refining and modification of light oils, while hydroprocessing refers to the refining and desulfurization of heavy oils. 　　In the 1950s, hydrogenation methods were applied and developed in the petroleum refining industry. In the 1960s, with the increase in catalytic reforming units, petroleum refineries were able to obtain inexpensive by-product hydrogen, leading to an increasingly widespread use of hydrogenation for refining. According to statistics from the early 1980s, hydrorefining in major industries accounted for 38.8% to 63.6% of the crude oil processing capacity. 　　Hydrorefining can be used for the refining of gasoline, kerosene, and diesel from various sources, as well as for the refining of materials used in catalytic reforming. It is also applied to the refining of lubricating oils and petroleum waxes (see color illustrations), to the partial hydrosaturation of aromatics in jet fuels, to the hydrodesulfurization of fuel oils, and to the removal of heavy metals and the pretreatment of residue oil. The hydrogen partial pressure is generally between 1 and 10 MPa, with a temperature of 300 to 450°C. The active metal components in catalysts are often two of molybdenum, tungsten, cobalt, and nickel (referred to as binary metal components), while the catalyst carrier is mainly alumina, with small amounts of silica, molecular sieves, and boron oxide added; sometimes phosphorus is also included as a catalyst promoter. For the hydrogenation of the aromatic fraction in jet fuel, metals such as nickel and platinum are used. Palladium is commonly used for the selective hydrogenation of dienes.