Method for reducing aromatic hydrocarbons in composition of gasoline
Abstract
In recent years, with an increasing number of ground vehicles with internal combustion engines, the need for fuel, including motor gasoline, has increased significantly.It is known that during the operation of vehicles, a large number of exhaust gases are emitted into the atmosphere, containing such substances as carbon oxides, nitrogen oxides and benzapyrenes.The main source of education benzapyrene are aromatic hydrocarbons, primarily benzene.In this regard, the content of aromatic hydrocarbons in motor gasoline is subject to strict environmental requirements Euro-5.As the object of research was taken gasoline AI-80.All studies were conducted in accordance with State standards and generally accepted practical guidelines for the analysis of petroleum products.Based on the above, at the next stage of research, hydroisomerization of the benzene-containing fraction of AI-80 gasoline was carried out on a nickel-tungsten-containing catalyst, which was basic nickel and tungsten deposited on chlorinated aluminum oxide.Many isomerization processes use highly acidic carriers.To do this, during its preparation, various zeolites or a carrier are added, which are treated with halogens (Cl or F).We treated the support (-alumina) with HCl.The AlNiW-Cl catalyst contains: 4.0% NiO, 5.0% WO 3 and 91% chlorinated Al 2 O 3 .The resulting modified gasoline based on hydroisomerizate meets European standards in terms of the content of benzene and aromatic hydrocarbons