In-depth comparative analysis of catalytic reforming and light hydrocarbon aromatization in the field of aromatics production

Aromatic hydrocarbons, especially light aromatic hydrocarbons BTX (benzene, toluene, xylene), are important basic organic chemical materials.The output and scale are second only to ethylene and propylene.Its derivatives are widely used in the production of chemical products and fine chemicals such as chemical fibers, plastics and rubber.In recent years, with the continuous development of petrochemical and textile industries, the world's demand for aromatic hydrocarbons has continued to grow.

Benzene and toluene are mainly derived from petroleum, accounting for 83% of the total production of benzene and toluene; the rest comes from coking benzene.Paraxylene, on the other hand, comes entirely from petroleum.At present, petroleum aromatics have become the main source of aromatics.The technology of producing aromatics from petroleum is mainly divided into three aspects: naphtha reforming, ethylene pyrolysis gasoline hydrogenation extraction and C4 and C5 aromatization technology.The amount of aromatic hydrocarbons produced by naphtha reforming accounts for 80% of the amount of aromatic hydrocarbons produced from petroleum, the amount of aromatic hydrocarbons produced by ethylene pyrolysis gasoline extraction accounts for 16% of the total amount of aromatic hydrocarbons, and the remaining 4% will be produced by C4 and C5 aromatization technologies production.Ethylene cracking aromatics is a by-product of ethylene plant, but the main raw material for ethylene cracking is naphtha, and the aromatics separation technology is the same as the reforming aromatics separation technology, so it can be considered that most of the aromatics come from naphtha to aromatics technology.